67 
and the pupa in six—making a period of about five weeks for fhe 
development of a generation from the egg. Four or five genera- 
Fig. 8. Confused Flour-beetle, T rib oHam confusum: a, larva (X 24 ) ; 
b, head of larva, greatly enlarged (dorsal view) ; c, anal end 
of larva, greatly enlarged (dorsal view) ; d, pupa 
(X 24) ; e, lateral appendage, greatly enlarged. 
tions may occur in a year, on an average, the number being de¬ 
pendent, however, upon the temperature, since development con¬ 
tinues as long as this is favorable. This beetle is commonly found 
in oatmeal, corn-meal, prepared wheat and flour, seeming to have 
a preference for these breakfast foods. It is by no means limited 
to such materials, however, but has been reported from such sub¬ 
stances as ginger, peanuts, beans, peas, orris roots, cayenne pepper, 
