THE GENUS DENDEOCTONUS. 



89 



clypeus with apex broadly emarginate. Sternellar lobes of thoracic 

 segment without foot calli. Larval type labeled ''Hopk. U. S. No. 

 5078." 



Galleries (fig. 49). — Egg galleries longitudinally winding; eggs 

 isolated; larval mines exposed in inner bark; pupal cells in outer bark. 



The galleries of this species are at once distinguished from those 

 of B. harberi and D. approximatus by the exposed larval mines. 



Fig. 49. — Dendroctonus convexifrons: Egg galleries and larval mines. (Original.) 



These three species usually infest the same tree, and often all of 

 their galleries are represented in a piece of bark. 



Distribution (fig. 50). — (Hopk. U. S.) Arizona: Williams, Flagstaff, 

 Show Low, Paradise, Santa Catalina Mountains, and Chiricahua 

 Mountains. Colorado: Las Animas County, La Veta, Fort Garland, 

 and Monte Vista. New Mexico: Cloudcroft, Meeks, Capitan, Fort 



