THE GENUS DENDROCTONUS. 



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 D. barberi and D. approximate 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 



