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



PLATE V. 



Fig. IL>. J>. simplex. 



DENDROCTONUS ADULTS. 



. p m/nt*^,;,: Fig. 14. D. piceaper<i>i. Fig. !<>. D. Itorealis. 

 (Original.) 



