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



PLATE VIII. 



'232 



DENDROCTONUS LARVXE. 



Fig. 1. D. brevicomte; la, spiracle, enlarged; Ib, spiracle, greatly enlarged, showing simple 

 bifid processes. Fig. 10. D. ponderosx, spiracle, greatly enlarged. Fig. 13. D. pseu- 

 <tot.<nge, spiracle, greatly enlarged. Fig. 14. D. piceaperda, spiracle, greatly enlarged. 

 Fig. 19. D. murrayanx;. 19a, dorsal aspect of abdominal segments 8 and 9, showing 

 plates; 19b, anal aspect: 19c, 19<7. and 19e, different aspects of spiracular tubercle, much 

 enlarged Fig. 23. D. rnkns; 23a, dorsal aspect of thoracic segments; 236, dorsal aspect 

 of abdominal segments; 23c, dorsal aspect of abdominal segments 8 and 9, showing 

 armed plates; 23c/, ventral aspect of thoracic segments; 23e, ventral aspect of abdominal 

 segment: 23/, anal aspect of abdominal segments 8, 9, and 10; 23g, 23/i, 23*, different 

 aspects of spiracular tubercles, moderately enlarged; 2Sj, spiracle and spiracular tubercle, 

 greatly enlarged. (Original.) 



