126 THE SCOLYTID BEETLES. 



BIBLIOGRAPHY AND SYNONYMY. 



Dendroctonus similis (not of Le Conte, 1860) Le Conte, 1876, p. 385 (in part), revision, 

 synonymy, bibliography, localities. Le Conte, 1878, p. 469, listed, Leavenworth 

 Valley, Colo. Packard, 1887, p. 177, Le Conte quoted. Packard, 1890, p. 722, 

 Le Conte quoted. Dietz, 1890, pp. 30-31, from Oregon, California, Colorado, fig. 3, 

 antenna, epistoma. Hopkins, 1899a, p. 392, fig. Iviii, adult. Hopkins, 1899b, pp. 

 10, 11-15, 21, 22, 26, first records, habits, hosts, etc. Wickham, 1902, p. 310, list 

 and localities. Hopkins, 1903a, p. 61, synonymy. Fall, 1907, p. 218, in list, 

 locality. 



Dendroctonus rufipennis (not of Kirby) Le Conte, 1876, p. 385 (in part) (in collection 

 1900-1907, under rufipennis}. Le Conte, 1878, p. 469 (in part). Packard, 1887, 

 pp. 177, 243 (in part?). Hopkins, 1899b, p. 15, localities, note. Hopkins, 1904, 

 p. 19, reference. 



Dendroctonus simplex (not of Le Conte) Dietz, 1890, p. 31 (in part), Colorado, Cali- 

 fornia. Wickham, 1902, p. 310 (on Dietz's authority). 



Dendroctonus pseudotsugx Hopkins, 1901b, p. 67, brief description of adult, galleries, 

 habits, distribution, etc. Hopkins, 1903a, p. 60, habits, comparison with D. simi- 

 lis, which=D. obesus. Hopkins, 1905, pp. 10, 11, brief description, habits, etc. 

 Hopkins, 1906a, p. 4, old work. 



Dendroctonus n. sp. (Douglas spruce beetle.) Hopkins, 1904, pp. 19, 45. 



14. Dendroctonus piceaperda Hopkins. 



(PI. V, fig. 14.) 



Adult. Type of species, female: Length, 5.75 mm.; elytra red, 

 thorax, head, and abdomen black; head with front convex and with 

 faint median and posterior impression and anterior elevated line. 

 Elytral declivity with striae not deeply impressed; epistomal process 

 broad, concave, with the lateral section oblique; punctures of prono- 

 tum distinctly irregular; posterior half of proepisternal area not 

 punctured; elytral striae distinctly impressed in dorsal and lateral 

 areas, with punctures rather coarse and distinct; interspaces slightly 

 convex ; rugosities acute, rather closely placed, irregular. Secondary 

 sexual characters: Declivity convex; striae very faintly impressed, 

 with fine indistinct punctures; interspaces nearly flat, shining, with , 

 approximate row of fine granules. 



Type labeled "Type No. 7451 U.S.N.M.," name label, "Hopk. 

 4/23/02, compared with Kirby type rufipennis, does not agree, Picea 

 canadensis, Hopkins, collector, Camp Caribou, Me., 9 type, Hopk. 

 U. S. 326." 



Male type: Length, 5.6 mm.; elytra dark reddish-brown; thorax 

 and head darker; elytral declivity convex; striae not impressed; 

 punctures obscure; interspaces flat, shining, and finely punctured, 

 with very small granules toward vertex. 



Type labeled, " $ type, type of drawing," name label, "Hopk. 

 1/22/08, Picea canadensis, Hopkins, collector, Camp Caribou, Me., 

 $ type, Hopk. U. S. 326." 



Variations. The length varies from 4.7 to 6 mm., with the average 

 about 5.5 mm. The color ranges from uniform light red to black, to 

 the head, thorax, and abdominal sternites dark to black, with the ely- 



