INJURIOUS INSECTS OF 1904. 



41 



Treatment which is successfully directed against the Flour Moth 

 will kill any of the following insects, when occurring in the mill 

 treated. 



The Granary Weevil. 



Fig. 16. — a, b, c, different stages of the Granary Weevil (Calandria granaria), d, Rice Wee- 

 vil (C. oryza). — F. H. Chittenden, Division of Entomology, U. S. Department of Agri- 

 culture. 



Fig. 16 illustrates this species and its congener, the Rice Wee- 

 vil. The hair lines by each show the natural size of the insect. 

 The female Granary Weevil punctures a grain of wheat with her 

 snout and lays an egg in the opening, the larva after hatching 

 feeding upon the interior of the kernel. There may be from four 

 to six broods of the Granary Weevil during the year, depending 

 on the temperature. It is estimated that one pair, under favorable 

 circumstances, will produce six thousand descendants in a year. 

 This beetle is of a shining brown color. It cannot fly. Its cousin, 

 the Rice Weevil, is a dull brown, its back provided with four red- 

 dish spots. It has well developed wings. In the southern states 

 this latter weevil is a serious pest. 



