Pimpla Conquisitor, pupa.

Ichneumon

Pimpla Conquisitor, pupa.

Pimpla Conquisitor, structural detail.

Ichneumon

Pimpla Conquisitor, structural detail.

Pimpla Conquisitor, structural detail.

Ichneumon

Pimpla Conquisitor, structural detail.

Pimpla Conquisitor, adult.

Ichneumon

Pimpla Conquisitor, adult.

Pimpla Conquisitor, structural detail.

Ichneumon

Pimpla Conquisitor, structural detail.

Pimpla Conquisitor, structural detail.

Ichneumon

Pimpla Conquisitor, structural detail.

Female Isosoma ovipositing in stem of wheat.

Isosoma

Female Isosoma ovipositing in stem of wheat.

Isosoma tritici, larva.

Isosoma

Isosoma tritici, larva.

Isosoma tritici, larva.

Isosoma

Isosoma tritici, larva.

Isosoma tritici, adult female.

Isosoma

Isosoma tritici, adult female.

Isosoma tritici, fore-wing.

Isosoma

Isosoma tritici, fore-wing.

Isosoma tritici, hind wing.

Isosoma

Isosoma tritici, hind wing.

Development of a Jassid, Agallia sanguinolenta species; the larva.

Jassid

Development of a Jassid, Agallia sanguinolenta species; the larva.

Development of a Jassid, Agallia sanguinolenta species; the pupa.

Jassid

Development of a Jassid, Agallia sanguinolenta species; the pupa.

Development of a Jassid, Agallia sanguinolenta species; adult.

Jassid

Development of a Jassid, Agallia sanguinolenta species; adult.

Development of a Jassid, Agallia sanguinolenta species; head of larva.

Jassid

Development of a Jassid, Agallia sanguinolenta species; head of larva.

The Southern Katydid, Microcentrum laurifolium- 1, the female adult; 1a, eggs laid on leaves and twigs of orange; 1b, the young katydids; 2b, parasites on the eggs.

Katydid

The Southern Katydid, Microcentrum laurifolium- 1, the female adult; 1a, eggs laid on leaves and twigs…

The Southern Katydid, Microcentrum laurifolium- the female

Katydid

The Southern Katydid, Microcentrum laurifolium- the female

The Southern Katydid, Microcentrum laurifolium- the male

Katydid

The Southern Katydid, Microcentrum laurifolium- the male

Anatis lady-birds, larva devouring slug of potato-beetle.

Ladybird

Anatis lady-birds, larva devouring slug of potato-beetle.

Anatis lady-birds, pupa.

Ladybird

Anatis lady-birds, pupa.

Anatis lady-birds, variation of adult.

Ladybird

Anatis lady-birds, variation of adult.

Anatis lady-birds, variation of adult.

Ladybird

Anatis lady-birds, variation of adult.

Anatis lady-birds, variation of adult.

Ladybird

Anatis lady-birds, variation of adult.

Anatis lady-birds, variation of adult.

Ladybird

Anatis lady-birds, variation of adult.

Laphygma frugiperda species.

Laphygma

Laphygma frugiperda species.

Laphygma frugiperda species; wing.

Laphygma

Laphygma frugiperda species; wing.

Laphygma frugiperda species; wing.

Laphygma

Laphygma frugiperda species; wing.

Grape-leaf on which larva of Harrisina americana are feeding.

Larva

Grape-leaf on which larva of Harrisina americana are feeding.

Larva of io moth.

Larva

Larva of io moth.

Sphinx larva covered with Microgaster cocoons.

Larva

Sphinx larva covered with Microgaster cocoons.

Lasioderma serricorne species.

Lasioderma

Lasioderma serricorne species.

Lasioderma serricorne species, from side.

Lasioderma

Lasioderma serricorne species, from side.

Lecanium Hemisphericum on orange-leaves; a, female scale.

Lecanium Hemisphericum

Lecanium Hemisphericum on orange-leaves; a, female scale.

The migratory locust travels in enormous numbers and can devour fresh fields to devastation.

Locust

The migratory locust travels in enormous numbers and can devour fresh fields to devastation.

Rocky Mountain locust ovipositing. a,a, females with abdomen inserted in the soil; b, an egg-pod broken open and lying on the surface; c, a few scattered eggs; d, section of soil removed to show eggs being put in place; e, an egg-pod completed; f, an egg-pod sealed over.

Locust

Rocky Mountain locust ovipositing. a,a, females with abdomen inserted in the soil; b, an egg-pod broken…

Woolly apple-louse, Schizoneura lanigera: showing a group of specimens on bark.

Apple Louse

Woolly apple-louse, Schizoneura lanigera: showing a group of specimens on bark.

Woolly apple-louse, Schizoneura lanigera: a crevice on a branch where they congregate.

Apple Louse

Woolly apple-louse, Schizoneura lanigera: a crevice on a branch where they congregate.

Woolly apple-louse, Schizoneura lanigera: a winged adult.

Apple Louse

Woolly apple-louse, Schizoneura lanigera: a winged adult.

The females deposit their eggs, which are small, oval, and black, on twigs and bark in the autumn; the insect is hatched out the next spring, and feeds upon the sap of the tree. The first broods are all females, which in a short time, without any intercourse with the males, give birth to living young by the process of gemmation. These also produce other young ones, which are all females as long as the summer lasts, and it is only in the autumn that males are produced, which, uniting with the females, become the parents of the eggs for the following spring brood, thus bearing living young all the summer, and laying eggs which can withstand the frosts of the winter in autumn for the following spring season, while the parent insects in winter are destroyed by the wet and cold weather and alternate freezing and thawing.

Apple Plant Louse

The females deposit their eggs, which are small, oval, and black, on twigs and bark in the autumn; the…

The females deposit their eggs, which are small, oval, and black, on twigs and bark in the autumn; the insect is hatched out the next spring, and feeds upon the sap of the tree. The first broods are all females, which in a short time, without any intercourse with the males, give birth to living young by the process of gemmation. These also produce other young ones, which are all females as long as the summer lasts, and it is only in the autumn that males are produced, which, uniting with the females, become the parents of the eggs for the following spring brood, thus bearing living young all the summer, and laying eggs which can withstand the frosts of the winter in autumn for the following spring season, while the parent insects in winter are destroyed by the wet and cold weather and alternate freezing and thawing.

Apple Plant Louse

The females deposit their eggs, which are small, oval, and black, on twigs and bark in the autumn; the…

Bee-louse of the Braula caeca species.

Bee Louse

Bee-louse of the Braula caeca species.

Bee-louse of the Braula caeca species; larva.

Bee Louse

Bee-louse of the Braula caeca species; larva.

A dog-louse.

Biting Louse

A dog-louse.

A sheep-louse.

Biting Louse

A sheep-louse.

A turkey-louse.

Biting Louse

A turkey-louse.

A psocus lineatus.

Book Louse

A psocus lineatus.

Pediculus Pubis. The crab-louse is gray-black and is a much broader square form than the other two species of louse, that has been a great scourge to soliders in time of war. This insect has been named the crab-louse from its broad crab-like appearance. It is of grayish color; the head is small, and appears to be united with the broad body without any thorax; it inhabits the hairy part of the body, under the arms or shoulders, in the beard, etc., but appears to avoid the head. These insects pierce deeply into the skin of mankind, and produce an intolerable itching.

Crab Louse

Pediculus Pubis. The crab-louse is gray-black and is a much broader square form than the other two species…

Phylloxera Vastatrix, a grape-vine-root gall-louse, is by many entomologists supposed to be another form of the Pemphigus vitifoliae above mentioned, but that, instead of living above ground and forming hollow bag-like galls on the leaves, it lives under-ground on the roots, upon which it forms knotty swellings or galls.

Grape-Root Louse

Phylloxera Vastatrix, a grape-vine-root gall-louse, is by many entomologists supposed to be another…

Phylloxera Vastatrix, female pupa from above.

Grape-Root Louse

Phylloxera Vastatrix, female pupa from above.

Phylloxera Vastatrix, female pupa from below.

Grape-Root Louse

Phylloxera Vastatrix, female pupa from below.

Phylloxera Vastatrix, winged female from above.

Grape-Root Louse

Phylloxera Vastatrix, winged female from above.

Phylloxera Vastatrix, winged female from below.

Grape-Root Louse

Phylloxera Vastatrix, winged female from below.

Phylloxera Vastatrix, an antenna.

Grape-Root Louse

Phylloxera Vastatrix, an antenna.

Phylloxera Vastatrix, oviparous wingless female and her eggs.

Grape-Root Louse

Phylloxera Vastatrix, oviparous wingless female and her eggs.

A hog-louse of the Hermatopinus urius species.

Hog Louse

A hog-louse of the Hermatopinus urius species.

A detailed view of the back of the hog-louse of the Hermatopinus urius species.

Hog Louse

A detailed view of the back of the hog-louse of the Hermatopinus urius species.

A detailed view of the scansorial claw of the hog-louse of the Hermatopinus urius species.

Hog Louse

A detailed view of the scansorial claw of the hog-louse of the Hermatopinus urius species.

The male hop-louse.

Hop Louse

The male hop-louse.

Macrobasis unicolor species.

Macrobasis

Macrobasis unicolor species.