THE GENUS DENDROCTONUS. 
71 
a 
Fig. 32.— The European barkbeetle-destroyer (Clerus formicarius) , introduced from Europe in 1892- 
1893: a A, Adult, dorsal aspect, natural size at right; B, adult, showing attitude when feeding on 
barkbeetle; C, pupa and details; D, larva and details. Greatly enlarged. (Author's illustration.) 
a Hopkins, 1899a, pp. 297-231. 
