130 THE SCOLYTID BEETLES. 



Fiske, 12 specimens; Hopk. U. S., over 300 specimens, including all 

 stages and work. 



BIBLIOGRAPHY AND SYNONYMY. 



Hylurgus rufipennis (not of Kirby) Peck, 1876, pp. 283, 301, destruction of spruce in 

 New York (evidently the work of D. piceaperda Hopk.). Peck, 1879, pp. 32-38, 

 ravages in spruce in northern wilderness (same as 1876?). Packard, 1890, pp. 814- 

 815 (quotes Peck, ibid.). Hough, 1882, pp. 259-263, insect ravages in spruce 

 forests of Maine. 



Dendroctonus rufipennis (not of Kirby) Le Conte, 1876, p. 385, revision, synopsis, 

 localities. Lintner, 1885, p. 54, destruction of spruce in New York. Fletcher, 

 1887, pp. 39-40, habits. Dietz, 1890, p. 30 (in part), Canada and New Brunswick. 

 Packard, 1887, pp. 177-243 (in part). Packard, 1890, p. 722 (in part), quotes 

 Le Conte. Harvey, 1898, p. 176, depredations on spruce in Maine; p. 98, host, 

 distribution, etc. Hopkins, 1898a, p. 69, distinct from simplex. Weed and Fiske, 

 1898, pp. 67-69, report on investigations. Chittenden, 1898, p. 96, doubt as to 

 Kirby's species. Smith, 1899, p. 364, Lakewood, N. J. Hopkins, 1899a, pp. 349- 

 393 (in part), reference. Hopkins, 1899c, p. 343 (in part?), reference. Chitten- 

 den, 1899, p. 56 (in part?), reference. Johnson, 1901, p. 92, habits in Pa. 

 Hopkins, 1905, p. 6, reference to wrong determination. Felt, 1906, p. 753 (in 

 small part), bibliography. 



Polygraphus rufipennis (not of Kirby) Packard, 1890, p. 721, [fig. 251=Polygraphus 

 rufipennis (Kirby)], Le Conte quoted (includes several species). 



Xyloterus bivittatus (not of Kirby) Packard, 1890, p. 823, fig. 276 (in part), adult?; PI. 

 XXIV, fig. 1, larva?, 1 a, pupa?, destruction of spruce. 



Barkbeetles. Packard, 1890, pp. 811-824 (in part), destruction of spruce, New Bruns- 

 wick to New York. 



Dendroctonus (Polygraphus) rufipennis (not of Kirby) Gary, 1900, pp. 52-54, depre- 

 dations on spruce, methods of control. 



Dendroctonus piceaperda Hopkins, 1901a, p. 16, PI. II, larvae, pupae, adult, etc., 

 original description, different stages and galleries, with full account of habits, host, 

 natural enemies, methods of control, etc. (see also index and Pis. I-V, XIV, XV). 

 Hopkins, 1902b, p. 21, mention. Hopkins, 1902a, p. 3. Hopkins, 1902c, p. 22, 

 habits, etc. Hopkins, 1903b, pp. 266, 270, 281, PL XXVII, figs. 23-25, stages 

 and work figured, revised account of habits, life history, methods of control, etc. 

 Hopkins, 1904, p. 26, PL I, fig. 3, Pis. V, XII, fig. 1, Pis. XIII, XIV, XV, stages 

 and work (reprints), habits, hosts, distribution, etc. Hopkins, 1905, pp. 10, 11, 

 distinctive characters, brief. Felt, 1905, pp. 6, 7, habits and work. Felt, 1906, 

 pp. 379-385, fig. 85 6, history, habits, etc. Hopkins, 1908, pp. 160-161, depreda- 

 tions. 



15. Dendroctonus engelmanni n. sp. 



Adult. Type of species, female: Length 6.2 mm., black. Head 

 with front convex, faint median and posterior impression and faint 

 anterior line. Elytral declivity with striae not deeply impressed; 

 punctures of pronotum distinctly irregular; posterior half of proepi- 

 sternal area not punctured ; punctures of prothorax and elytra rather 

 coarse; striae moderately impressed; interspaces moderately convex, 

 and scarcely rugose, except on dorsal area. Secondary sexual char- 

 acters: Declivity convex; striae rather distinctly but not deeply 

 impressed ; punctures distinct ; interspaces with rows of granules. 



