ClipArt ETC
Eriosoma Tesselata was found on birch in Maryland, in clusters near the ends of twigs, in the autumn. It is of a black color, with white spots on the fore part of its body, and is covered with a snow white down or wool on its hinder part.

Wooly Aphid

Eriosoma Tesselata was found on birch in Maryland, in clusters near the ends of twigs, in the autumn.…

A large aphis is found in clusters on the under side of limbs of hickory, oak, and basswood and walnut, July and August, puncturing the bark and sucking the sap.

Hickory Aphis

A large aphis is found in clusters on the under side of limbs of hickory, oak, and basswood and walnut,…

A grape-vine leaf gall-louse. The insect forms galls on the under side of the grape-vine leaves, and although they appear to do comparatively little injury to the vine, they are extremely interesting to vine-growers.

Fitch

A grape-vine leaf gall-louse. The insect forms galls on the under side of the grape-vine leaves, and…

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…

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…

Minute plant-feeding insects. They vary in size from 1-10 mm long.

Plant Louse

Minute plant-feeding insects. They vary in size from 1-10 mm long.

A French Phylloxera, slightly distorted.

Phylloxera

A French Phylloxera, slightly distorted.

French Phylloxera, distorted in mounting.

Phylloxera

French Phylloxera, distorted in mounting.

American Phylloxera.

Phylloxera

American Phylloxera.

American Phylloxera.

Phylloxera

American Phylloxera.