138 THE SCOLYTID BEETLES. 



BlBLIOr.RAPHY AND SyNONOMY. 



Hylurgus obesus « Mannerheim, 1843, p. 29(5, original description. Mannerheim, 

 1852, p. 356, spec. 474, list, variety b and variety c, brief descriptions. Man- 

 nerheim, 1853, p. 238, separate p. 146, list, var. d described. Le Conte, 1868, 

 p. 173, mentioned, synonymy. 



Dendroctonus similis Le Conte, 1860, p. 59, description (from one specimen which = 

 D. obesus). Le Conte, 1868, p. 173, mentioned as synonymous with Z). obesusMann. 

 Hopkins, 1902a, p. 3, recognized as synonymous with D. obesus (Mann.). 



Dendroctonus obesus (Mann.) Le Conte, 1868, p. 173 (in part). Chapuis, 1869, p. 35; 

 1873, p. 243, revised description. Hamilton, 1894, p. 35 (in part). Hopkins, 

 1899b, pp. 15, 21, habits, host, etc. Schwarz, 1900a, p. 537, author's reprint p. 

 185 (in part), list. Hopkins, 1902a, p. 3, species recognized as distinct from D. 

 rufipennis Kirby. Hopkins, 1902c, p. 22, habit and host. Hopkins, 1903a, p. 

 60, reference. 



Dendroctonus rufipennis (not of Kirby). Le Conte, 1868, p. 173 (?=Z). obesus). 

 Le Conte, 1876, p. 385, revision, synonymy, bibliography, localities (in collection 

 1900-1907, under rufipennis) . Packard, 1887, pp. 176, 243 (in part?). 



Dendroctonus rufipennis (obesus Mann.) Harrington, 1890, p. 189, author's extra, p. 19. 



Dendroctonus Jceeni Hopkins, 1902a, p. 3, manuscript name only on variation. 



Dendroctonus fietcheri Hopkins, 1902a, p. 3, manuscript name only on variation. 



18. Dendroctonus rufipennis (Kirby). 



(PL VI, fig. 18.) 



Adult. — Typical female: Length 6.2 mm. Elytra red; thorax, 

 head, and abdomen reddish brown. Head convex, with faint ante- 

 rior and posterior impression and short anterior line; elytral declivity 

 with striae not deeply impressed; punctures of pronotum distinct, 

 irregular; posterior half of proepisternal area punctured; striae of 

 elytral declivity with fine punctures; elytral striae scarcely impressed, 

 except toward suture; strial punctures moderately coarse; inter- 

 spaces with rugosities moderately coarse, sparse, and acute; pronotal 

 punctures coarse, deep, moderately dense. Secondary sexual char- 

 acters: Elytral declivity convex; striae faintly impressed; punctures 

 obscure; interspaces faintly convex, with row of fine granules. 



Typical female labeled "type of drawing," name label, "Hopk., 

 4/25/02. Agrees with Kirby's type, compared by C. O. Waterhouse, 

 H. S. 28, 9 , White Fish Point, L[ake] S[uperior]." 



Typical male: Length 6.7 mm. Elytra dark red, thorax and head 

 reddish brown. Agrees with female, excepting that the elytral 

 declivity is more shining, the strial punctures are less distinct, and the 

 interspaces have less distinct rows of granules. 



Typical male labeled, name label, "Hopk. 1/22/08, Pinus strohus, 

 Grand Island, Mich., W.F.Fiske, collector, ^ , Hopk. U. S. 3761." 



Variations.— H^Yie length varies from 5 to 7.3 mm., with the average 

 at about 6.5 mm., the head, thorax, and ventral segments from 



a This was Eschscholtz's manuscript name, published in Dejean Cat., 3me. Edit., 

 p. 331, but Mannerheim published the first description. 



