Death Head Roach sexual dimorphism?

birdonfire

birdonfire

First Instar
Does Blaberus craniifer display sexual dimorphism? Do females tend to have more brownish wing coloration? Do crumpled wings tend to be more prominent in females? My Death's Head colony has a few individuals that are duller colored than the others.

 
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The females are certainly bigger and heavier in body. Crumpled wings is due mostly to overcrowding and improper molting surfaces.

 
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