[1][2] Adults of Hyalopterus pruni aptera can reach a body length of about 1.5–2.6 mm (0.059–0.102 in).

These small to medium-sized aphids are narrow and oval shaped, with a conical tail and quite short antennae, reaching half the length of the body.

They are covered of mealy white wax that may make them look gray or light green.

[3][5] Their nutritional activity produces a quantity of honeydew which remains on the host plants and attracts a variety of insects.

This article related to members of the insect family Aphididae is a stub.