55 Insects described in 1781

Acrida conica, the giant green slantface, is a species of grasshopper found in Australia and New Guinea. It was originally described in 1781 as Truxalis conicus.

Aiolopus thalassinus is a species of grasshopper belonging to the family Acrididae, subfamily Oedipodinae. It is present in many countries of Europe, and in the Afrotropical realm to Asia and the Pacific islands.

Andrena haemorrhoa is a Palearctic species of mining bee.

Anechura bipunctata is a species of earwigs in the family Forficulidae.

Anthrax anthrax is a species of fly in the family Bombyliidae. Unlike, for example, Bombylius major, this species does not mimic a bee. The eggs are flicked by the adult female toward the entrance of the nests of mason bees. After hatching, the larvae find their way into the nests to feed on the bee larva. Anthrax anthrax can be found in May to August throughout mainland Europe, but probably does not occur in Britain. In the Netherlands Anthrax anthrax is a common visitor of insect hotels.

Arphia sulphurea, known generally as sulphur-winged grasshopper, is a species of band-winged grasshopper in the family Acrididae. Other common names include the spring yellow-winged locust and spring yellow-winged grasshopper. It is found in North America.

Astata boops is a Palearctic species of solitary wasp. It is associated with sandy habitats and preys on the nymphs of pentatomid bugs.

Augocoris illustris is a species of shield-backed bug in the family Scutelleridae. It is found in the Caribbean Sea, Central America, North America, and South America.

Bembecinus tridens is a species of sand wasps belonging to the family Crabronidae.

Bittacomorpha clavipes, known as the phantom crane fly, is a species of fly in the family Ptychopteridae. It is found in the eastern United States west to the Rocky Mountains.

Bombylius pygmaeus is a species of bee flies in the family Bombyliidae.

Calliphora stygia, commonly known as the brown blowfly, or rango tumaro in Māori, is a species of blow-fly that is found in Australia and New Zealand. The brown blowfly has a grey thorax and yellow-brown abdomen.

Delphinia picta is a species of picture-winged fly in the family Ulidiidae. The specific name picta is from Latin and means "painted." It is the only species in the monospecific genus Delphinia. It is found in the United States on the East Coast and in the Midwest from Florida to Maine across to Kansas through Minnesota but also can be found in Mexico and El Salvador. It is sometimes mistaken for a species of fruit fly, but D. picta do not feed on living plant matter, as they are detritivores and eat decaying plant matter. They also have been observed eating fermenting frass from Megacyllene robiniae on black locust trees. They can be found almost anywhere there is decaying vegetation: landfills, temperate deciduous forests, swamps, and even shaded fields.

Deraeocoris schach is a species of plant bugs belonging to the family Miridae, subfamily Deraeocorinae.

The human botfly, Dermatobia hominis, is one of several species of flies, the larvae of which parasitise humans. It is also known as the torsalo or American warble fly, though the warble fly is in the genus Hypoderma and not Dermatobia, and is a parasite on cattle and deer instead of humans.

Dexiosoma caninum is a European species of fly in the family Tachinidae.

The Norwegian wasp is a species of eusocial wasp. It is common in Scandinavia and can also be found in Scotland and other areas in Britain and Ireland. Often known for being a tree wasp, it nests in low branches and bushes and feeds on insects. It also obtains nectar from blueberry and snowberry flowers. Although Dolichovespula norwegica were rarely considered as pests in the past, a few cases of pest problems relating to D. norwegica have been reported multiple times. The species is not endangered.

The emerald cockroach wasp or jewel wasp is a solitary wasp of the family Ampulicidae. It is known for its unusual reproductive behavior, which involves stinging a cockroach and using it as a host for its larvae. It thus belongs to the entomophagous parasites.

NOTE: Commons links to Eristalinus quinquestriatus Eristalinus quinquelineatus is an African, European and Asian species of hoverfly.

Exoprosopa capucina is a species of 'bee fly' belonging to the family Bombyliidae subfamily Anthracinae.

Holcostethus albipes is a shield bug belonging to the family Pentatomidae, subfamily Pentatominae. The species was first described by Johan Christian Fabricius in 1781.

Ibisia marginata, the black-legged water-snipefly, is a species of ibis flies belonging to the family Athericidae, a small family very similar to the Rhagionidae.

Issus coleoptratus is a species of planthopper belonging to the family Issidae.

Lasioglossum albipes is a Palearctic species of sweat bee.

Lasioglossum leucozonium, also known as Lasioglossum similis, is a widespread solitary sweat bee found in North America, Europe, Asia, and parts of northern Africa. While now a common bee in North America, population genetic analysis has shown that it is actually an introduced species in this region. This population was most likely founded by a single female bee.

Lasiopogon cinctus is a Palearctic species of robber fly in the family Asilidae.

Limonia phragmitidis is a Palearctic species of craneflies in the family Limoniidae.It is found in a wide range of habitats and micro habitats: in earth rich in humus, in swamps and marshes, in leaf litter and in wet spots in woods.

Liocoris tripustulatus or the common nettle bug is a species of plant bug belonging to the family Miridae, subfamily Mirinae. The species was first described by Johan Christian Fabricius in 1781.

Lonchaea chorea is a species of fly in the family Lonchaeidae. It is found in the Palearctic. The larva develops in cow dung.

Macrotermes bellicosus is a species of Macrotermes. It is the largest termite known, with queens measuring about 4.2 inches (110 mm) long, workers about 0.14 in (3.6 mm) and soldiers are slightly larger. Bellicosus means "combative" in Latin. The species is a member of a genus indigenous to Africa and South-East Asia.

Megalodontes cephalotes is a species of sawflies within the Symphyta belonging to the family Megalodontesidae.

Megarhyssa atrata is a species of large ichneumon wasp. It is known from North America, where it is found from Quebec, Michigan, Ohio and North and South Carolina to Florida.

Myospila meditabunda is a fly from the family Muscidae.

Neomyia cornicina is a common species of fly which is distributed across many parts the Palaearctic. It has been introduced in the Nearctic.

Nesoselandria morio is a species of sawflies belonging to the family Tenthredinidae subfamily Tenthrediniinae. It is the only species of the genus Nesoselandria.

Neurigona quadrifasciata is a species of long-legged fly in the family Dolichopodidae.

Osmia bicolor, the two-coloured mason-bee, is a Palearctic species of bee in the genus Osmia. It is outstanding amongst other megachilid bees in that it nests in empty snail shells.

Pantilius tunicatus is a species of bug in Miridae family that could be found in the Baltic states, Faroe Islands, Finland, Italy, United Kingdom, Yugoslavia, the Netherlands, Eastern, Central, and Western Europe. and across the Palearctic to Siberia and northern China. Also Scandinavia with the exception of the high north and the northern Mediterranean.The species feed on hazel and usually are found on the lowest branches of it. The adults have a brown pronotum and green legs, with the antennae shorter than the body. The species doesn't appear until September.

Physocephala rufipes is a species of fly from the genus Physocephala in the family Conopidae. Their larvae are endoparasites of bumble bees of the genus Bombus. It is common throughout much of Europe.

Pinthaeus sanguinipes is a species of stink bug.

Platycheirus albimanus is a common widespread species of hoverfly. A holarctic species its range includes Greenland, Iceland, Britain, mainland Europe, Russia, across Siberia to the pacific coast, the Philippines, Alaska, western Canada and United States.

Ptyelus grossus is an Auchenorrhynchan spittlebug in the family Aphrophoridae. Occurring from Southern Africa through to West Africa, the species is gregarious in its larval and nymph stages, feeding on a variety of plants, and producing protective nests of acrid foam from the plant's sap. Excreted in large quantities, the foam drips incessantly causing wet patches on the soil below.

Rasahus hamatus, the corsair, is a species of corsair in the family Reduviidae. It is found in the Caribbean, Central America, North America, and South America.

Scellus notatus is a species of fly in the family of Dolichopodidae. It is found in the Palearctic.

Scolia hirta is a species of wasp in the subfamily Scoliinae of the family Scoliidae.

Sirex cyaneus is a species of horntail in the genus Sirex. Native to forests in Alberta, they grow to 2 cm in length.

Stethomostus fuliginosus is a species of common sawfly in the family Tenthredinidae.

Stizus fasciatus is a species of sand wasps belonging to the family Crabronidae.

Tachina lurida is a species of fly in the genus Tachina of the family Tachinidae that can be found everywhere in Europe, except for Albania, Belarus, Estonia, Ireland, Liechtenstein, Lithuania, Luxembourg, Monaco, San Marino, Scandinavia, Slovenia, Vatican City, and various European islands.

Tachypompilus analis, the red-tailed spider wasp is a species of spider wasp found in most of tropical and subtropical Asia, north to Japan. These spider wasps often hunt huntsman spiders.

Tetanocera elata is a species of fly in the family Sciomyzidae. It is found in the Palearctic Larvae of T. elata are known obligate feeders on slugs both as parasitoids and predators.

Therion morio is a species of ichneumon wasp in the family Ichneumonidae.

Trichopoda pennipes, common name feather-legged fly, is a fly in the family Tachinidae.

Xylocopa africana is a species of carpenter bee.

Xyphosia miliaria is a species of tephritid or fruit flies in the family Tephritidae.