178 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



Having six legs to carry it about, it is not satisfied with a single 

 seed, but runs about here and there, nibbling at several. When full 

 grown the larva glues together several grains or fragments into a little 

 case, and inside of this transforms to the pupa and then to the beetle. 

 In early spring this life cycle requires from six to ten weeks, but in 

 summer it is reduced to about twenty-five days. Thus there are 



FIG. 152. The Cadelle (Tenebroides mauritanicus) : a, adult beetle with 

 greatly enlarged antenna above; 6, pupa; c, larva all enlarged. (After 

 Chittenden, U. S. Dept. Agr.) 



from three to six or more generations during a season, according 

 to the latitude. 



The Red or Square-necked Grain-beetle* is about the same 

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

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



* Cathartus gemellatus Duv. Family Tenebrionidce. 



