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General Description

Eggs are about .25 mm long, are milky white immediately after oviposition, and eventually turn pale brown (Cooley 1904). The young larvae are microscopic and resemble the large whitish larvae having a yellowish head (Cooley 1904). The soft and delicate pupae are between 5 and 7 mm long, are almost pure white, and reveal distinct adult parts with separate wing sacs along their backs that eventually fuse (Cooley 1904). Immediately after emerging from the pupa, the adult appears light brown, and eventually turns brownish black (Cooley 1904). Adults are 5 to 7 mm long, have elbowed antennae slightly widened at the tip, have fused elytra and cannot fly (Cooley 1904). The apex of their tibia is rounded, their femora are toothed with the first femora having 2 small teeth at the base, and their rostrum is short and stout (Warner and Negley 1976). When adults are disturbed, they pull in their legs and remain immobile (Cooley 1904).


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© University of Alberta Museums

Source: University of Alberta Museums

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