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



Plate 111. 



Dendroctonus Adults. 



Fig. 1. — D . hrevicomis. Fig. 2. — D.harberi. Fig. 3. — D. convexifrons. Fig. 4. — D. frontalis. Fig. 5,- 

 JD. arizonicus. Fig. 6. — £>. viexicamts. Fig. 7. — £>. parallelocollis. (Original.) 



