536 



THE MONTHLY BULLETIN. 



by Van Dine in 1907, whose excellent description of its appearance and 

 history we herewith reprint^ : 



"The beetle is somewhat ant-like in form. The color of the elytra 

 (wing covers) and of the head and beak is bluish black; that of the pro- 



Fig. 329. — The sweet potato weevil, Cyclas formicarius Tryon. 1, egg; 



2, larva; 3, pupa; 4, adults — all natural size; 5, adult greatly enlarged; 



6, showing work of larva on interior of tuber. (After Shiraki. Photo by 

 Archie Chatterley. ) 



thorax is reddish brown. The yellowish white oval eggs are laid in small 

 cavities eaten by the parent beetles near the stem end of the tuberous 

 roots. The milk-white larvffi bore little tunnels through the root in all 

 directions, so that the vine dies; and frequently the entire potato is 



'Hawaii Station Report, 1907. 



