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.…

"Corn Aphis: a, natural size." — Chambers' Encyclopedia, 1875

Corn Aphis

"Corn Aphis: a, natural size." — Chambers' Encyclopedia, 1875

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…

"Aphis; a genus of small plant-sucking insects, of the family Aphididæ and order Homoptera."-Whitney, 1902

Apple Louse

"Aphis; a genus of small plant-sucking insects, of the family Aphididæ and order Homoptera."-Whitney,…

"Aphis; a genus of small plant-sucking insects, of the family Aphididæ and order Homoptera."-Whitney, 1902

Geranium Plant Louse

"Aphis; a genus of small plant-sucking insects, of the family Aphididæ and order Homoptera."-Whitney,…

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…

"Pylloxera is a genus of insects allied to the Aphis and Coccus families. The Phylloxeridæ attach themselves to various plants, on the juice of which they feed, and which they often injure or destroy. P. vastatrix is the name given to an insect of this family, which, since 1865, has committed great devastation in the vineyards of France. Great numbers of this insect appear on the roots of the vine, where they produce galls, and their punctures are so numerous and incessant that the roots can no longer supply nutriment to the plant, which fades and dies. There is a form which lives on the leaves, also producing galls."—(Charles Leonard-Stuart, 1911)

Phylloxera

"Pylloxera is a genus of insects allied to the Aphis and Coccus families. The Phylloxeridæ attach…

"Pylloxera is a genus of insects allied to the Aphis and Coccus families. The Phylloxeridæ attach themselves to various plants, on the juice of which they feed, and which they often injure or destroy. P. vastatrix is the name given to an insect of this family, which, since 1865, has committed great devastation in the vineyards of France. Great numbers of this insect appear on the roots of the vine, where they produce galls, and their punctures are so numerous and incessant that the roots can no longer supply nutriment to the plant, which fades and dies. There is a form which lives on the leaves, also producing galls."—(Charles Leonard-Stuart, 1911)

Phylloxera

"Pylloxera is a genus of insects allied to the Aphis and Coccus families. The Phylloxeridæ attach…

"Pylloxera is a genus of insects allied to the Aphis and Coccus families. The Phylloxeridæ attach themselves to various plants, on the juice of which they feed, and which they often injure or destroy. P. vastatrix is the name given to an insect of this family, which, since 1865, has committed great devastation in the vineyards of France. Great numbers of this insect appear on the roots of the vine, where they produce galls, and their punctures are so numerous and incessant that the roots can no longer supply nutriment to the plant, which fades and dies. There is a form which lives on the leaves, also producing galls."—(Charles Leonard-Stuart, 1911)

Phylloxera

"Pylloxera is a genus of insects allied to the Aphis and Coccus families. The Phylloxeridæ attach…