Length 5-7 mm. Vertex smoothly rounded. Antennae usually surpassing abdomen, then loosely encircling caudal end of abdomen 1-4 times. Abdomen with 1-2 rows of dorsal spines on most segments; segments 3-7 movable (Common 1990). Pupation inside larval case with the pupal exuvium partially extruded.
Pupal tergal spines:
Spines as modified cremaster:
The larval case also serves as a cocoon.
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