Tech. Series 17, Part I, Bureau of Entomology, U. S. Dept. of Agriculture. 



PLATE 





DENDROCTONUS ADULTS. 



Fig. 1. D. brevicomis. Fig.2.D.barberi. Fig. 3. I), conrcxifrons. Fig. 4. D. frontalis. Fig. 5, 

 D. arizonicus. Fig. 6. D. mcxicanus. Fig. 7. D. pamttclocollis. (Original.) 



