California maple aphid

Reddish brown to dark olive-green. The length of the antennae is about 0.6 times the body length, with the terminal process about twice as long as the last antennal segment.The broken dorsal cross bands are dark as are the head, pronotum, and siphunculi. The siphunculi are about as long as the second hind tarsal segment. The hind femur and tibia are uniformly dark (cf. Periphyllus testudinaceus where the tibiae have a very pale middle section which contrasts with their dark base and tip). The cauda is broadly rounded with 8-12 hairs. The body length is 2-3 mm.