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Showing posts with label Insects. Show all posts
Showing posts with label Insects. Show all posts

Wednesday 25 October 2023

Aphids of the family: Aphididae - Αφίδες της οικογένειας Αφιδίδες – Cyprus

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Order: Hemiptera

Family: Aphididae

The Aphididae are a very large insect family in the aphid superfamily (Aphidoidea), of the order Hemiptera. These insects suck the sap from plant leaves. Several thousand species are placed in this family, many of which are considered plant/crop pests. They are the family of insects containing most plant virus vectors (around 200 known) with the green peach aphid (Myzus persicae) being one of the most prevalent and indiscriminate carriers.

Evolution

Aphids originated in the late Cretaceous about 100 million years ago (Mya), but the Aphidinae which comprises about half of the 4700 described species and genera of aphids alive today come from their most recent radiation which occurred in the late Tertiary less than 10 Mya.

Reproduction

Most aphid species can reproduce both asexually and sexually, with several parthenogenetic generations between each period of sexual reproduction. This is known as cyclical parthenogenesis and, in temperate regions, sexual reproduction occurs in autumn and results in the production of overwintering eggs, which hatch the following spring and initiate another cycle. Many pest aphids, however, do not overwinter as an egg but as nymphs or adults and others as both eggs and active stages (see Williams and Dixon 2007). For their size, the parthenogenetic individuals have very short developmental times and potentially prodigious rates of increase (de Réaumur 1737 Huxley 1858; Kindlmann and Dixon 1989; Dixon 1992). Thus, aphids show very complex and rapidly changing within-year dynamics, with each clone going through several generations during the vegetative season and being made up of many individuals, which can be widely scattered in space. The survival of the eggs and/or overwintering aphids determines the numbers of aphids present the following spring.

The within-year dynamics of aphids are largely determined by seasonal changes in host quality. Aphids do best when amino acids are actively translocated in the phloem. In spring, the leaves grow and import amino acids via the phloem; in summer leaves are mature and export mainly sugars. In autumn, the leaves senesce and export amino acids and other nutrients. Thus on trees the leaves are most suitable for aphids in spring and autumn. The differences in within-year population dynamics of aphids are due to differences in the effect these seasonal fluctuations in host plant quality have on the per capita rate of increase and intraspecific competition in each species. This annual cycle, consisting of two short periods when the host plant is very favourable and a long intervening period when it is less favourable, is well documented for tree dwelling aphids. This has greatly facilitated the modelling of their population dynamics. In general the aphid carrying capacity of annual crop plants tends to increase with the season until the plants mature after which it tends to decrease very rapidly. Thus, the aphid carrying capacity of trees tends to be high in spring and autumn and low in summer, whereas that particularly of short-season annual crops tends to be low early in a year, peaking mid year and then declining.

Characteristics

Members of the Aphididae are soft-bodied, pear-shaped insects called aphids, as are other members of the superfamily Aphidoidea. Most of them have a pair of little tubes, called cornicles, projecting dorsally from the posterior of their abdomens. The cornicles have been variously interpreted as organs of excretion or for the production of honeydew, but their only confirmed function to date is that they produce fatty alarm pheromones when the insects are attacked by predators

When wings are present they occur only on particular morphs called "alates", and wingless morphs are said to be "apterous". The forewing (mesothoracic wing) of the alate in the Aphididae has four to six veins attached to a major vein-like structure that has been interpreted as the combined stems of all the other major wing veins. That structure ends in a stigma, a solid spot on the anterior margin of the forewing. The rear (metathoracic) wings have a similar scheme, but simpler in structure, with no stigma[5] The rear wing however, does bear a hamulus, a small hook that, when in flight, engages the claval fold of the forewing, keeping the wing beats in synchrony.

All aphids have very small eyes, sucking mouthparts in the form of a relatively long, segmented rostrum, and fairly long antennae.

These insects are so small (a few millimeters in length), that winds can transport them for fairly long distances. They are often green, but might be red or brown, as well. They move quite slowly and cannot jump or hop. Aphids excrete a sugary liquid called honeydew, because the plant sap from which they feed contains excess carbohydrates relative to its low protein content. To satisfy their protein needs, they absorb large amounts of sap and excrete the excess carbohydrates. Honeydew is used as food by ants, honeybees, and many other insects.

Classification

There is considerable controversy in the classification of aphids, with conservative classifications recognizing as many as 24 subfamilies within a single family Aphididae and others elevating various subfamilies to establish as many as 9 other families within Aphidoidea in addition to Aphididae. From https://en.wikipedia.org/wiki/Aphididae

                                                      Photos by George Konstantinou

Thursday 19 October 2023

The citrus leafminer - Phyllocnistis citrella Stainton, 1856 - Cyprus

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Order: Lepidoptera

Family: Gracillariidae

The citrus leafminer (Phyllocnistis citrella) is a moth of the family Gracillariidae. It is also known as CLM in agriculture. It was described by Henry Tibbats Stainton from India in 1856. It was first found in Florida, United States, in 1993, but is now found all over the world, including Argentina, Australia, Brazil, China, Corsica, Costa Rica, Cuba, India, Israel, Madeira, Malaysia, Mauritius, Mexico, the Philippines, South Africa, Spain, Sri Lanka and other parts of the United States.The wingspan is about 5 millimetres (0.20 in).The larvae are considered a serious agricultural pest on Citrus species, such as Aegle marmelos, Atalantia, Citrofortunella microcarpa, Citrus limon, Citrus paradisi, Citrus maxima, Fortunella margarita, Murraya paniculata and Poncirus trifoliate. Larvae have also been recorded on Garcinia mangostana, Pongamia pinnata, Alseodaphne semecarpifolia, Loranthus and Jasminum sambac. They mine the leaves of their host plant. The mine consists of a long epidermal corridor with a well-marked central frass line. The mine is mostly lower-surface, but sometimes upper-surface, and rarely on the rind of the developing fruit. Citrus leaf miner larvae are thus protected from many topic insecticide treatments. Pupation takes place in a chamber at the end of the corridor, under an overturned part of the leaf margin.

Citrus leafminer (CLM) are native to Asia and are found throughout the continent and beyond. Japan, the Philippines, New Guinea, India and Taiwan are some of the countries in which the pest is distributed. The pest is not exclusively found in these countries having spread to nearly every citrus growing area in the world. Recent spread into North and South America was reported in the early 1990s. This is especially important because major citrus growing operations are found in Brazil and the US. These two countries account for half of the world's citrus production From https://en.wikipedia.org/wiki/Phyllocnistis_citrella

Photos Strovolos / Demetris Kolokotronis 06.09.22







Wednesday 18 October 2023

Common green lacewing - Chrysoperla carnea (Stephens, 1836) - Χρύσωπας - Cyprus

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Order: Neuroptera

Family: Chrysopidae

Chrysoperla carnea, one of the species of common green lacewing, is an insect in the Chrysopidae family. Although the adults feed on nectar, pollen and aphid honeydew, the larvae are active predators and feed on aphids and other small insects. It has been used in the biological control of insect pests on crops.

Chrysoperla carnea was originally considered to be a single species with a holarctic distribution but it has now been shown to be a complex of many cryptic, sibling subspecies. These are indistinguishable from each other morphologically but can be recognised by variations in the vibrational songs the insects use to communicate with each other, which they especially do during courtship.

Description
The green lacewing eggs are oval and secured to the plant by long slender stalks. They are pale green when first laid but become gray later. The larvae are about one millimetre long when they first hatch. They are brown and resemble small alligators, crawling actively around in search of prey. They have a pair of pincer-like mandibles on their head with which they grasp their prey, sometimes lifting the victim off the leaf surface to prevent its escape. The larvae inject enzymes into the bodies of their victims which digest the internal organs, after which they suck out the liquidated body fluids.[citation needed] The larvae grow to about eight millimetres long before they spin circular cocoons and pupate.

Adult green lacewings are a pale green colour with long, threadlike antennae and glossy, golden, compound eyes. They have a delicate appearance and are from twelve to twenty millimetres long with large, membranous, pale green wings which they fold tent-wise above their abdomens. They are weak fliers and have a fluttery form of flight. They are often seen during the evenings and at night when they are attracted by lights.[4][unreliable source?] The high green sensitivity of the superposition eyes allows the green lacewings to recognize fresh green leaves that they use to find honey dew produced by aphids, a site for egglaying and a resting place

Distribution and habitat
Chrysoperla carnea is an exclusively European species. However, due to taxonomic revisions to the genus, in particular the Chrysoperla carnea species group, the exact geographic bounds of the species remain in question. As of 2009, two of the primary candidates for the true C. carnea are designated as Cc2 ("slow motorboat") and Cc4 ("motorboat"). Cc2 is the more restricted of the two candidates, only extending from central Spain north to England and east to Greece and Hungary. Cc4 is more widespread, ranging from the Southern Alps to the north through the United Kingdom and into the southern portion Fennoscandia and to the east to western or central Russia. Both candidates also differ in terms of habitat, with Cc2 being restricted to warmer elevations of below 1,000 meters whereas Cc4 is more tolerant of the cold and ranges into elevations above 1,000 meters

The green lacewing adults overwinter buried in leaf litter at the edge of fields or other rough places, emerging when the weather warms up in spring. Each female lacewing lays several hundred small eggs at the rate of two to five per day, choosing concealed spots underneath leaves or on shoots near potential prey. The eggs are normally laid during the hours of darkness.

The larvae hatch in three to six days, eat voraciously and moult three times as they grow.They feed not only on aphids but also on many other types of insects and even prey on larger creatures, such as caterpillars. They can consume large numbers of prey and completely destroy aphid colonies. When food is scarce they turn cannibal and eat each other.[citation needed] After two to three weeks, the mature larvae secrete silk and build round, parchment-like cocoons in concealed positions on plants. From these, the adults emerge ten to fourteen days later. The length of the life cycle (under 4 weeks in summer conditions) is greatly influenced by the temperature and there may be several generations each year under favourable conditions. From https://en.wikipedia.org/wiki/Chrysoperla_carnea

Photo Geri 2005 by George Konstantinou



Ventocoris trigonus (Krynicki, 1871) .- Cyprus

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Order: Hemiptera

Family: Pentatomidae

Pentatomidae is a family of insects belonging to the order Hemiptera, generally called shield bugs or stink bugs. Pentatomidae is the largest family in the superfamily Pentatomoidea, and contains around 900 genera and over 4700 species.[1][2] As hemipterans, the pentatomids have piercing sucking mouthparts, and most are phytophagous, including several species which are severe pests on agricultural crops. However, some species, particularly in the subfamily Asopinae, are predatory and may be considered beneficial.

Photo Geri 2005 by George Konstantinou



Velia (Plesiovelia) affinis Kolenati, 1857 - Cyprus

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Order: Hemiptera

Family: Veliidae

Veliidae is a family of gregarious predatory insects in the suborder Heteroptera. They are commonly known as riffle bugs, small water striders, or broad-shouldered water striders because the segment immediately behind the head is wider than the rest of the abdomen. The genus Rhagovelia is also referred to as a ripple bug.

Veliidae have a specialized body plan that allows them to walk on water and are neuston. Gerridae is another closely related group that is also neuston and both are in the superfamily Gerroidea. Veliidae are smaller however, between 1.5 and 6 mm (0.059 and 0.236 in). They can be found on ponds, near lake shores, and in rivers worldwide. Some species can also be found on plants near water, in salt water or in mud flats.

Life cycle

Like all Heteroptera, the Veliidae go through an egg, nymph and adult stage. They have four or five nymphal instars. Both the adults and nymphs live together gregariously, in loose communities and can often be found in large groups. Eggs are usually laid underwater, attached to the stream bed, rocks or plant material and held together by a gelatinous substance. In most species females lay under 30 eggs. Nymphs are very similar to adults, but have one segmented tarsus on mid and hind leg as opposed to the adults' two. Some species prefer rapids or riffles in streams but many prefer calmer water.

Distribution

Veliidae is the largest gerromorphan family and has almost 1173 species and 66 genera. The present distribution of these species points to two centers of origin: one in the Indo-Malayan region and another on the shores of the Caribbean Sea. The geographical distance between these points is probably due to continental drift. And now they are present across all continents (except Antarctica).

Description

Veliidae are very similar to Gerridae. The most consistent characteristic used to separate these two families are internal genitalia differences, however external cues are usually sufficient to tell the families apart.

A general description is as follows: an oval to elongate body covered with hydrofuge hairs. Wings can be present or absent; when present the wings range from well devolved to vestigial. The four segmented antennae is longer than the head and readily visible. The antennae is non-aristate. The eyes are usually large, but there are no ocelli.

Males and females can be differentiated by the fore tibiae. Males have smaller tibiae with a grasping comb, as opposed to the larger plain female tibiae.

Water walking

Veliidae can walk on water because they take advantage of the high surface tension of water and have hydrophobic legs that distribute their weight across more water.

Although Gerridae typically have longer legs, Veliidae also have legs that spread out the weight over a relatively large area. Thousands of hydrofugal hairs also coat the entire body, mitigating potential problems incurred by water contact: air bubbles, trapped among the tiny hairs if the insect is submerged, lift the insect towards the surface again. From https://en.wikipedia.org/wiki/Veliidae

Photo by Michael Hadjiconstantis




Sunn pest or corn bug – Eurygaster integriceps Puton, 1881.- Cyprus

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Order: Hemiptera

Family: Scutelleridae

Eurygaster integriceps is a species of shield bug in the family Scutelleridae, commonly known as the sunn pest or corn bug. It is native to much of northern Africa, the Balkans and western and central Asia. It is a major pest of cereal crops especially wheat, barley and oats.

Morphology and biology

The colour of the sunn pest varies but it is usually light brown. The body is a broad oval about 12 millimetres (0.5 in) long. The scutellum is wide and chitinous and covers the wings and the whole abdomen. The insect lives for about a month during which time the females lay twenty eight to forty two eggs. These are laid in batches each having two neat rows of seven eggs, on the underside of leaves and on the stems of the host plant, or sometimes on weeds. The eggs take six to twenty eight days to hatch and the nymphs moult five times while they feed on the leaves, stems and ears of cereal crops for the next twenty to forty five days. They grow fastest at an air temperature of 20–24 °C (68–75 °F). The second and third instars have a pale abdomen and dark head and thorax. The fourth instar has the rudiments of fore wings and the fifth instar, the rudiments of hind wings as well.

Distribution

The sunn pest is found in Northern Africa, Albania, Greece, Bulgaria[1] and Romania. In Asia it occurs in Turkey, Syria, Lebanon, Iran, Iraq, Afghanistan and Pakistan and the republics of Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Uzbekistan. In Russia it has spread into the central and Volga Basin regions, the Northern Caucasus, the Chelyabinsk region and Bashkortostan.

Ecology

The adults mostly overwinter in leaf litter in woods but some find refuge among rough vegetation. When the temperature reaches about 13 °C (55 °F) they seek out cereal crops, start to feed on the stems, leaves and developing seed heads, mate and lay their eggs. There is only one generation each year so adults and nymphs can be found feeding together on the ripening grain. If the insects are not fully developed when the crop is harvested, some nymphs and young adults feed and mature on fallen grain and other crop residues before flying off to their winter quarters. In Syria, they spend about nine months in hibernation. From https://en.wikipedia.org/wiki/Eurygaster_integriceps

Photo 2005 by George Konstantinou



Seed Bugs – Lethaeus sp. - Cyprus

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Order: Hemiptera

Family: Rhyparochromidae

Photo 2005 by George Konstantinou



Seed Bugs – Heterogaster sp. - Cyprus

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Order: Hemiptera

Family: Heterogastridae

Heterogaster is a genus of seed bugs in the family Heterogastridae. There are about 11 species, nine of the Old World, and two of the New World

Photo 2005 by George Konstantinou



Planthoppers - Reptalus sp. - Cyprus

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Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)

Family Cixiidae (Cixiid Planthoppers)

A planthopper is any insect in the infraorder Fulgoromorpha, in the suborder Auchenorrhyncha, a group exceeding 12,500 described species worldwide. The name comes from their remarkable resemblance to leaves and other plants of their environment and that they often "hop" for quick transportation in a similar way to that of grasshoppers. However, planthoppers generally walk very slowly. Distributed worldwide, all members of this group are plant-feeders, though few are considered pests. The infraorder contains only a single superfamily, Fulgoroidea. Fulgoroids are most reliably distinguished from the other Auchenorrhyncha by two features; the bifurcate ("Y"-shaped) anal vein in the forewing, and the thickened, three-segmented antennae, with a generally round or egg-shaped second segment (pedicel) that bears a fine filamentous arista

Photo 2005 by George Konstantinou


Odontotarsus sp.- Cyprus

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Order: Hemiptera

Family: Scutelleridae

Hemiptera (/hɛˈmɪptərə/; from Ancient Greek hemipterus 'half-winged') is an order of insects, commonly called true bugs, comprising over 80,000 species within groups such as the cicadas, aphids, planthoppers, leafhoppers, assassin bugs, bed bugs, and shield bugs. They range in size from 1 mm (0.04 in) to around 15 cm (6 in), and share a common arrangement of piercing-sucking mouthparts. The name "true bugs" is often limited to the suborder Heteroptera

Photo 2005 by George Konstantinou



Shore earwig, tawny earwig, riparian earwig, or the striped earwig - Labidura riparia (Pallas, 1773). - Cyprus

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Order: Dermaptera

Family: Labiduridae

Labidura riparia is a species of earwig in the family Labiduridae characterized by their modified cerci as forceps, and light tan color. They are commonly known as the shore earwig, tawny earwig, riparian earwig, or the striped earwig due to two dark longitudinal stripes down the length of the pronotum. They are sometimes wrongly referred to as Labidura japonica, although said species is actually a subspecies, Labidura riparia japonica, found only in Japan. L. riparia are a cosmopolitan species primarily in tropical to subtropical regions. Body size varies greatly, ranging from 16 mm to 30 mm, with 10 abdominal segments. Males and females differ in forcep size, with males having much larger and stronger curve, while females have smaller, straighter forceps with a slight curve at the end. Earwigs use these forceps to assist in predation, defense, sexual selection, courting and mating, and wing folding.

L. riparia are a subsocial earwig with complex maternal habits. They are voracious predators, and highly regarded as efficient for pest control in many situations. Repugnitory glands in the earwigs cause them to secrete a foul smelling pheromone to deter predators, which is said to smell like decomposition.

Males of this species have two penises in which they can use interchangeably.[8] Individuals have a preference on which they dominantly use though. Just like humans’ limb dexterity, L. riparia have a 90% prevalence of “right-handed” penises. This unequal proportion is unique to this species compared to all other earwigs, and may have a relationship with the spermatheca location on females.
The striped earwig prefers dark, moist environments with shelter that it can hide in during the daytime. They can be found in a variety of niches though, from cultured and uncultured farmlands, woodlands, and the margins of ponds and lakes. To save energy, the earwigs will occupy abandoned mole cricket burrows for brooding nests. Individuals are known to fly after a disturbance in search of a new nest as theirs may have become waterlogged or destroyed. Flight towards light has been observed due to their methods of orientation via the moon.

L. riparia are generalist predators whose diet consists entirely of insects or scavenged meat. They have a preference to Lepidoptera larvae and insect eggs, but will eat any available insect. The earwig may use its long and powerful cerci to kill and immobilise larger insects. Because of their flexible eating habits, they easily adapt to any habit as long as there are insect around. In absence of a ready food supply, they have been known to eat nymphs and eggs of their own species. As nocturnal insects, earwigs only hunt after sunset, but feed primarily just after sunset occurs. Feeding habits of females depend more on their ovulatory cycle, and will go long periods of time without eating in preparation of egg laying.

The primary predator to L. riparia is ants, as they prey on unattended eggs. Overlap of predation does occur between organisms though as the earwigs prey on the ant eggs as well, the effect of ants on earwigs seems to be greater than the reverse relationship, as populations of earwigs increase if the ants decrease.From https://en.wikipedia.org/wiki/Labidura_riparia

Photos Alaminos 2005 by George Konstantinou




Plant bugs - Deraeocoris (Deraeocoris) rutilus (Herrich-Schäffer, 1838) - Cyprus

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Order: Hemiptera
Family: Miridae

Deraeocoris is a genus of plant bugs in the family Miridae. There are at least 210 described species in Deraeocoris.

Photo Geri 2005 by George Konstantinou



Distoleon tetragrammicus (Fabricius, 1798) - Cyprus

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Order: Neuroptera

Family: Myrmeleontidae

Distoleon tetragrammicus is a species of antlion in the subfamily Myrmeleontinae.

Distribution

Distoleon tetragrammicus is widespread in the western Palearctic realm and it is present in most of Southern Europe and in North Africa.

Habitat

This species can be found in a wide range of habitats, from coastal dunes to mountain forests, mainly in arid and sandy areas, in oak and pine forests and in various calcareous wasteland with minimum moisture. The larvae avoid exposed sites as coastal dunes

The adults of Distoleon tetragrammicus greatly resemble dragonflies or damselflies. They have a wingspan of about 75 millimetres (3.0 in). The front wing can reach a width of 26–40 millimetres (1.0–1.6 in). They have thick, prominent, apically clubbed antennae, a long, narrow abdomen and two pairs of long, transparent, multiveined wings, with some brown and opaque spots. This species is sometimes confused with Myrmeleon formicarius.

The larvae do not look anything like adults. The length of a fully grown larva is typically 12–22 millimetres (0.47–0.87 in).[8][9] The basic body color is dark brown with darker markings. The head is dark brown. The strong dark brown mandibles do not show long bristles outside the margins. Pronotum is covered by large black setae and short bristles. The dorsal side of abdomen has a series of circular markings and a characteristic dorsal median stripe. Mesothoracic and abdominal spiracles are brown. Legs may be yellowish or whitish.

The adults of Distoleon tetragrammicus appear in the middle of the summer and fly from June to August. They are attracted to light. The life cycle begins with oviposition by the female into sand. Larvae of this species don't build craters or pit traps. They live buried in dry ground and may be errant. They are voracious predators, feeding on small insects and other small arthropods that they catch with their powerful jaws. After one year the larva retreats into a cocoon and metamorphoses into an adult From https://en.wikipedia.org/wiki/Distoleon_tetragrammicus

Photo by Michael Hadjiconstantis



Delfimeus limassolicus (Navás, 1931) - Cyprus

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Order: Neuroptera

Family: Myrmeleontidae

Delfimeus limassolicus is a species of Neuroptera in the family   Family Myrmeleontidae (antlions). They are nocturnal.

Photo by Michael Hadjiconstantis



Cueta lineosa (Rambur, 1842) - Cyprus

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Order: Neuroptera

Family: Myrmeleontidae

Cueta is an antlion genus in the family Myrmeleonidae.

Photo Geri 2005 by George Konstantinou




Cotton seed bug - Oxycarenus hyalinipennis (A. Costa, 1843) - Cyprus

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Family: Lygaeidae

Oxycarenus hyalinipennis, common name cotton seed bug, is a species of plant bug belonging to the family Lygaeidae, subfamily Oxycareninae

Distribution

This widespread species can be found in Southern Europe (Bosnia and Herzegovina, Bulgaria, Croatia, France, Greece, Italy, Portugal, Spain, former Yugoslavia and Albania), in the Afrotropical realm, in the Neotropical realm, and in the Oriental realm.

While historically it has been documented as an important pest of cotton in the Mediterranean region and in coastal Africa, it is an invasive species whose range has expanded over the last three decades to include islands of the Caribbean region.

Oxycarenus hyalinipennis can reach a length of about 3.8 mm in males, of 4.3 mm in females. Therefore, males are slightly smaller than females. Body of these bugs is black with translucent wings. Head is black, with brownish-black antennae. The second antennal segment usually is partially pale yellow. Pronotum is blackish-brown. Corium is usually yellowish-whitish and hyaline. Femora are black, while tibiae are brown with a yellow-white band.

Nymphs have pink to red abdomen.

Biology

This species may have three to four generations per year. Females of these bugs lay about twenty eggs. This species goes through five nymphal stages. A generation lasts about twenty days.

It is a polyphagous insect, and it has been documented as a prominent pest upon the following genera within family Malvaceae: Abutilon, Cola, Eriodendron, Gossypium, Malva, Sphaeralcea, Hibiscus, Pavonia, Sida, Dombeya, Sterculia and Triumfetta. Of these, Gossypium appears to be the preferred host,[3][6] but significant pest presence on okra has also been reported. From https://en.wikipedia.org/wiki/Oxycarenus_hyalinipennis

Photo Geri 2005 by George Konstantinou




Chrysoperla sp.. - Cyprus

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Family: Chrysopidae

Order: Neuroptera

Chrysoperla is a genus of common green lacewings in the neuropteran family Chrysopidae.Therein they belong to the Chrysopini, the largest tribe of subfamily Chrysopinae. Their larvae are predatory and feed on aphids, and members of this genus have been used in biological pest control.

Taxonomy and phylogeny

The genus Chrysoperla was first described by H. Steinmann in 1964 as a subgenus of Chrysopa as Chrysopa (Chrysoperla). His original diagnosis based on facial markings was found to be unreliable by B. Tjeder in 1966, who revised Steinmann's subgeneric classification based on details of male genitalia. In 1970, H. Hölzel revised these subgenera further and moved Chrysoperla to a subgenus of Atlantochrysa as Atlantochrysa (Chrysoperla). It wasn't until 1977 that Chrysoperla was elevated to a full genus by Y. Séméria, based on the combination of the absence of a gonapsis in males, lack of carrying a debris packet in larvae, and overwintering as an adult. This series of revisions further caused species to be moved between genera several times as the taxa, particularly Chrysopa and Chrysoperla, were being redefined. The monophyly of the genus was verified in the revision of Chrysopidae genera by Brooks and Barnard in 1990.

Description and identification

Chrysoperla is one of several green lacewing genera with adults having a pale, yellowish stripe down the middle of the body. It is typically separated from other such genera by the short intramedian cell (im), which doesn't overlap the first crossvein from the radial sector. This genus, however, is defined predominantly based on male genitalia. Chrysoperla is one of six genera possessing an arcuate tignum and three genera to lack a gonapsis. It is distinguished from all other green lacewing genera by the presence of spinellae on the gonosaccus in the male genitalia.

Chrysoperla species may be identical in terms of morphology, but can be readily separated based on the vibration signals used to attract mates. For example, the southern European C. mediterranea looks almost identical to its northern relative C. carnea, but their courtship "songs" are very different; individuals of one species will not react to the other's vibrations.

Distribution

This genus has a cosmopolitan distribution. Species in this genus are particularly common in both Europe and North America.From https://en.wikipedia.org/wiki/Chrysoperla

Photo Athalassa 2005 by George Konstantinou




Burrowing bugs or negro bugs - Canthophorus dubius (Scopoli, 1763) - Cyprus

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Family: Cydnidae

Canthophorus dubius is a species of burrowing bugs or negro bugs belonging to the family Cydnidae, subfamily Sehirinae.

This palearctic species is widespread in most of Europe, in Asia and in North Africa.

It was found in Albania, Algeria, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Egypt, Finland, France, Germany, United Kingdom, Greece, Hungary, Iran, Israel, Italy, Lithuania, Republic of Moldova, Poland, Romania, Russia (in the northwest of the Caucasus), Slovakia, Slovenia, Spain, Sweden, Switzerland, Syria, Turkey, Ukraine and former Yugoslavia.[3]

Habitat

These burrowing bugs inhabit grasslands and open dry-warm areas, in particular lime or sand-marshes. In the Alps you can find them up to over 1000 meters above sea level.

Canthophorus dubius can reach a length of 6–8 millimetres (0.24–0.31 in) and a width of 3.5–4.5 millimetres (0.14–0.18 in).

The body of these shieldbugs is oval, black or dark blue, sometimes metallic green or bright violet. The margins to the pronotum and corium of the hemielytra are white. Antennae are black with the second segment smaller than third. The legs are black. Membrane of the hemielytra is whitish and connexivum shows white bands.

This species is very similar to Canthophorus impressus. A certain identification requires dissection.

Biology

There is one generation per year. The overwintering occurs as an adult bug under foliage and in moss near the host plants. The mating takes place in May and June. The nymphs appear from June to August, the new generation of adults from July.

Adults and larvae are trophically associated with Thesium species (Thesium alpinum, Thesium linophyllon and Thesium pyrenaicum), more rarely with other plants: wormwood (Artemisia), mint (Salvia), thyme (Thymus) etc. From https://en.wikipedia.org/wiki/Canthophorus_dubius

 Photo by George Konstantinou



Beosus quadripunctatus (Muller, 1766) - Cyprus

See also 

All about Cyprus - Όλα για την Κύπρο


Family: Rhyparochromidae

Beosus quadripunctatus is a species of dirt-colored seed bug in the family Rhyparochromidae, found in Europe, the Middle East, and western Asia

 Photo by George Konstantinou