Pars 4 Xyleborus. 113 



(f Xylehorxis aesculi Ferr. Borkenk. 1867, p. 22, 

 nota 2. — Eichh. Rat. Tom. 1879, p. 362. — 

 Hopkins, Canad. Ent. XXX, 1898, p. 28. 



cf Bostrichus decolor Boieldieu, Ann. Soc. Ent. 

 Fr. (3) VII, 1859, p. 473. — Perris, Ann. Soc. 

 Ent. Fr. (4) VI, 1866, p. 125. — Ferr. Borkenk. 

 1867, p. 21, nota 2. — Eichh. Stett. Ent. Zeit. 

 1876, p. 378; Rat. Tom. 1879, p. 352. — Hop- 

 kins, Canad. Ent. XXX, 1898, p. 29. 

 $ Tomicus Dohrni Woll. Ins. Mader. 1854, p. 290. 



— Eichh. 1. c. — Hopkins 1. c. 



$ Xyleborus dryographus Ferr. Borkenk. 1867, 

 p. 20, 3, p. 22, nota 2 (pars). 



$ Bostrichus Saxeseni Ratz. Forstinsekt. 1,1837, 

 p. 167; 1839, I, p. 204. — cf Wiesmann, Stett. 

 Ent. Zeit. 1846, p. 24. — Nördlingcr, 1. c. 1848, 

 p. 246. — cf § Bach, Käf. II, 1854, p. 126, 

 134. — Doebner, Zoolog. II, 1862, p. 182. — 

 Eichh. Stett. Ent. Zeit. XXXVI, 1876, p. 378; 

 Rat. Tom. 1879, p. 361. — Reitt. Bestimm.-Tab. 

 1894, p. 91. — Eichh. Rat. Tom. 1879, p. 369. 



— Tredl, Ent. Blätter III, 1907, p. 19. — 

 Swaine, Cat. Scol. N. Am. 1909, p. 157. - Bedel, 

 Faun. Col. Seine VI, 1888, p. 402. — Barbey, 

 Scol. l'Europ. Centr. 1901, p. 107. — Eichh. 

 u. Schwarz, U. St. Nat. Mus. Proc. 18, 1896, 

 p. 609. 



Tomicus xylographus Thomson, Scand. Col. 

 VII, 1864, p.' 370. 



Xyleborus subdepressus Rey, Rev. d'Entom. 

 II, 1888, p. 142. — Hopkins, Canad. Ent. XXX, 

 1898, p. 28. 



Biologie: Bellevoye, Soc. Rheims Bull. III, 1894, 

 p. 89. — Barbey, 1. c. — Brenner, Canad. 

 Entomol. XXXIX, 1907, p. 195. — Cecconi, 

 Staz. Spar. Agr. Ital. 1909, p. 945. — Currie, 

 U. St. Div. Ent. Bull. 53, 1905, p. 71. — Eichh. 

 Europ. Borkenk. 1881, p. 279. — Fall u. Cocke- 

 rell, Trans. Am. Ent. Soc. 33, 1907, p. 217. — 

 Hamilton, Trans. Am. Ent. Soc. 21, 1894, p. 406; 

 22, 1895, p. 346, 378. — Hopkins, W. Va. Agric. 

 Exp. Sta. Bull. 31, 1893, p. 136; Bull. 56, 1899, 

 p. 258; Canad. Ent. XXVI, 1894, p. 278; XXX, 

 1898, p. 21: U. St. Div. Ent. Bull. 48, 1904, 

 p. 61. — Hubbard, Proc. Ent. Soc. Wash. III, 

 1896, p. 318; U. St. Div. Ent. Bull. VII, 1897, 

 p, 24. — Judeich u. Nitsche, Forstinsektenkunde 

 I, 1895, p. 545. — Lintner, Report XI, N. Y. 

 1896, p. 270. — Luggar, Minn. Agric. Exp. 

 Sta. Bull. 66, 1899, p. 311. — Nördlinger, 

 Nachträge 1856, p. 31. — Ormerod, Ins. Orchard. 

 Fruits, Handbook 1898, p. 192. — Skinner, 

 Ent. News XVI, 1905, p. 248. — Titus u. Pratt, 

 U. St. Div. Ent. Bull. 47, 1904, p. 20. — Wash- 

 burn, Minn. Agric. Exp. Sta. Bull. 84, 1903, 

 p. 60, 82, 91 {Xyleborus i. sp.). 



239 



