158 



INSECTS INJURIOUS TO STAPLE CROPS. 



The Red or 8qiiare-necked Grain-beetle {Catharius 

 gemellatus Duv.) (Fig. 89) is about the same size as the 

 last species, but is of a reddish-brown color, and the 

 thorax is nearly square, nearly as broad as the abdomen, 





Fig. 90.—Tenebroides mauritanicus. a, adult beetle with greatly en- 

 larged antenna above; h, pupa; c, larva— all enlarged. (After 

 Chittenden, U. S. Dept. Agr.) 



and not notched on the sides. It breeds in corn in the 

 field and in the granary, first destroying the germ, so that 

 it is especially injurious to seed-corn. It feeds mostly out 

 of doors, though sometimes infesting the granary. 



The Foreign Grain-beetle {Cathartus advena Waltl.) is 



