The body length of Acyrthosiphon pisum apterae ranges from 2.2 to 5.0 mm long.  They are pale green or pink with red eyes. Their antennae are 1.0 to 1.6 times as long as the body. The antennal segments, tibiae and siphunculi have dark apices. The siphunculi are tapering and very thin.

with a good image and where the host plant is known.

Feeds on about 20 genera in the family Fabaceae but especially on Medicago, Melilotus, Trifolium, Dorycnium and Lotus.

Summer.

See 'Habitat' section for food plants.

Because of the lack of records it is very difficult to assess the status of this species in Britain but it is probably quite frequent.

Status in Leicestershire and Rutland not known.

https://influentialpoints.com/Gallery/Acyrthosiphon_pisum_Pea_aphid.htm