This section is from "The Horticulturist, And Journal Of Rural Art And Rural Taste", by P. Barry, A. J. Downing, J. Jay Smith, Peter B. Mead, F. W. Woodward, Henry T. Williams. Also available from Amazon: Horticulturist and Journal of Rural Art and Rural Taste.
This name is proposed for a large species of Aphis which forms follicles on the leaves of the silver-leaved Maple (Acer eriocarpum). The specimens were sent to us by our ex-President, Caleb Cope, Esq. This curious Aphis appeal's to be a new species. Dr. Fitch, in the descriptions of the New York State Cabinet; mentions the European Aphis acres as occurring in New York, and may have this woolly species in view; but the description of the foreign one does not mention the remarkable filaments which approximate the insect to certain tropical forms. Both sexes are covered with white down, and have a bunch of white filaments posteriorly, some of which are three-fourths of an inch long, a character in which this species surpasses the Eriosoma of the apple tree. Male, - Black, feet long, slender, and rufous; tarsi bi-articulate; wings slightly deflexed, translucent, pale ferruginous at the base; submarginal nervure conspicuous, black, and ending in a long stigma; disc with four simple nervures; posterior wings with three nervures; mesonotum polished, with a deep Y-shaped impression; abdomen without tubes; promuscis obsolete; antennae 6 - articulate, the first two short, the 3d long; and the 4th, 5th, 6th, gradually lengthening; length of the body 1 1/2 lines, or to the end of the wings 2 1/2. Female and pupa. - Apterous, dark reddish brown, feet paler; promuscis twice as long as the head, thickened near the apex; length 1 1/2 lines.