112 



THE SCOLYTID BEETLES. 



Galleries (figs. 69, 70). The egg galleries are longitudinal, and 

 usually nearly straight. They are usually grooved on the surface of 

 the wood and deeply grooved in the inner bark, with the larval mines 

 and pupal cells exposed. The eggs are placed in approximate groups, 



FIG. 69. Dendroctonus ponderosx: Egg galleries and larval mines. ( Original.) 



and the larval mines are short. The egg galleries differ from those 

 of D. monticolx in the larger diameter and straighter, shorter form. 

 ^ Distribution (fig. 71). (Hopk. U. S.) Arizona: Chiricahua Na- 

 tional Forest, Flagstaff, Fredonia, San Francisco Mountains. Colo- 

 rado: Bailey, Brookvale, Cascade, Cat Mountain, Cochetopa, Colo- 



