198 



COLEOPTERA— BEETLES 



The nut weevils have enormously elongated snouts 

 They infest chestnuts, pecans, acorns, hazel-nuts, etc. 



Fig. 147. — Hazel-nut weevil (Balaninus obtusus) : a, adult female, dorsal 

 view; 6, head from side; c, head of male from side. Enlarged. (Chittenden, 

 Div. Eiit., U. S. Dept. Ag.) 



Fig. 148. — Boll weevil {Anthonomus grandis): rt, adult beetle; h, pupa; 

 c, larva. All enlarged. (From Howard, Div. Ent., U. S. Dept. Ag.) 



Cotton-boll Weevil.^ — In the Southern States we have a 

 most striking case of introduction and dispersal in the 

 cotton-boll weevil, which came into southern Texas from 

 Mexico about the year 1890 and has been making steady 



