Wingspan of 13-17 mm. Forewings are dark brown or brownish-grey with a metallic shine. White stripes (7-9) with black markings in between are present along the costa. Dark spots and white comma spots are usually present near the hindwing border. Hind wings are whitish-yellow and brown near the hind border.
The final instar reaches 14 mm in length. Body initially white but becoming yellow with a dark head and anal scutellum. Eight lines of dark warts are present. Eight pairs of legs are present with 3 on the thorax.
Oval shaped, 0.75 – 0.8 mm in length, flattened on one side. Initially white coloured, becoming yellow with age. Laid in clusters on leaves.
Europe, Asia minor and North America.
Pea and Lentil.
The first instar wanders from the site of hatching, usually for 1 day before boring into pods to feed. Once fully grown the larvae leaves the pod to pupate on the ground.