Numbers increase continuously over the growing season of the host plant, and because of the gregarious nature of these insects large aggregations are common.

Labium bent under the breast, and united to the antepectus, not longer than the head and rather stout in the males (2 the profile), composed of 4?

short oblong joints, 2nd the stoutest and curved, 4th the smallest ovate-conic and pilose : longer and slenderer in the female (F).

Wings membranous, deflexed in repose ; superior twice as long as the body, ample, the marginalfurcate cells short ; inferior much smaller, with 2 slightly oblique nervures, remote at the costa : Females generally apterous (F).

Legs slender and long, especially the hinder pair : thighs elongated in the females as well as the tibiae, especially in the hinder pair, which are not curved: tarsi short, bi-articulate, basal joint minute, 2nd long and clavate : claws curved and acute (6, foreleg) This article related to members of the insect family Aphididae is a stub.