116 



THE SCOLYTID BEETLES. 



with obscure foot scars. Larval type labeled "Hopk. U. S. No. 

 6204b." 



. There is very little variation in the four specimens before the 

 writer, and the narrow smoother frontal elevation, not elevated and 

 broadened toward the suture, is the most distinctive character sepa- 

 rating the larva of this species from those of the two preceding 

 species. 



Galleries. — The egg galleries are longitudinal, nearly straight, 

 grooved on surface of the wood, and deeply grooved in the inner 

 bark, with the larval mines and pupal cells exposed. The eggs are 

 placed singly and in approximate groups. The egg galleries and lar- 

 val mines of this species differ from those of the two preceding in 



Fig. 72.— Dcndroctonusjeffreyi: Distribution map. (Original.) 



being much coarser; otherwise they appear to be more like those of 

 monticolsd. 



Distribution (fig. 72). — (Hopk. U. S.) California: Chester, Little 

 Yosemite, Nevada City, Pinogrande, Sterling, Tallac, Yosemite 

 (Yosemite National Park), and Seven Oaks (San Bernardino National 

 Forest). 



Host trees. — Pinus jeffreyi. P. ponderosa, and P. lambertiana. 



Identified specimens. — Hopk. U. S., over 160 specimens, including 

 adults, pupse, and larvae. 



DIVISION II. 



The distinctive characters common to the species of the second 

 division are: 



Adults. — Prothorax stout, usually narrower than elytra, distinctly 

 narrowed or constricted toward head; elytra with anterior dorsal 



