Continued
Description:
The male and female average 6.3 and 10.5 mm long, respectively. Recently emerged adults can be readily recognized by their white shoulders and prothorax, contrasting with the grayish-whiteforewings that are marked by dark patches. The hindwings are narrowed toward the tips, somewhat like those of the Angoumois grain moth (Sitotroga cerealella), but not so acutely.

Life Cycle:
Egg incubation requires 10 to 58 days, the larval period is 38 to 133 days, and the period from egg to adult is 62 to 235 days. The full-grown larva is about 12 mm long, and white, with a brownish head, in fact very similar to the brown house moth.