104 



THE SCOLYTID BEETLES. 



sternellar lobes, each with a distinct foot callus. Larval type labeled 

 "Hopk. U. S. No. 5024." 



Galleries (figs. 63, 64). — Egg galleries sublongitudinal, branched, 

 slightly winding; eggs isolated; larval mines concealed; pupal cells in 

 outer bark. 



Distribution (fig. 65). — (Hopk. U. S.) Colorado: Brookville, Glen 

 Haven, Las Animas County, La Veta, Monte Vista, and Palmer Lake. 

 Utah: Escalante, Kamas, Panguitch. New Mexico: Capitan Moun- 

 tains, Cloudcroft, Lincoln National Forest, Santa Fe. Arizojia: 

 Black Mesa Forest Reserve, Chiricahua Mountains, Flagstaff, Para- 

 dise, Rincon Mountains, Santa Catalina Mountains, Show Low, 

 Tucson. Additional locality from correspondence: Glenhaven, Colo. 



Fig. 65. — Dendroctonus approximatus: Distribution map. (Original.) 



Host trees. — Pinus ponderosa scopulorum (common), P. arizonica 

 (rare), and P. cMhuahuana (rare). 



Identified specimens. — Horn, A. E. S., 1 specimen, the type; 

 U.S.N.M., 31; Hopk. U. S., more than 200 specimens, including all 

 stages and work. 



Bibliography and Synonymy. 



Dendroctonus approximatus Dietz, 1890, p. 31, fig. 5, antenna and epistoma; original 

 description (applies to type only). Blandford, 1897, p. 147, reference to charac- 

 ters. Hopkins, 1899a, p. 392, fig. LVIII, reference. Schwarz, 1902, p. 32 (in 

 part), destructive to pine at Flagstaff, Ariz, (see also convexifrons) . Wickham, 

 1902, p. 310 (in part), list, Dietz quoted. Hopkins, 1903a, p. 60, reference to 

 habits, etc. Hopkins, 1903b, p. 281, mention. Hopkins, 1904, p. 44, habits, dis- 

 tribution, hosts, etc. Hopkins, 1905, p. 11, some distinctive characters. Hopkins, 

 1906c, p. 81, referred to D. parallelocollis. 



Dendroctonus (parallelocollis) var. approximatus (Dietz) Fall, 1907, p. 218, list, 

 localities. 



