Fig. 26.—The cheese fly (Piophila casei ) : a, larva ; b, puparium ; c, pupa; 
d, adult male; e, adult female ; all enlarged. (Author’s illustration.) 
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Fig. 27.—The fruit fly (Drosophila ampelophila) ; a, adult male; 
b, antennae; c, fore tibia; d, e, puparium; f, larva; g, anal segment 
of larva; enlarged. (Author’s illustration.) 
