THE GENUS DENDBOOTONUS. 169 



1902. ScHWARZ, E. A.— Proc. Ent. Soc. Wash., V, No. 1, p. 32, May 17, 1902. 



1902. Weber, L.— Zur biologie von Rhizophagus grandis Gyllh.<Allgemeine Zeit- 



schrift fur Entomologie, VII, p. 108. 

 1903a. Hopkins, A. D.— Forest insect explorations in the summer of 1902.<Can. Ent., 



XXXV, No. 3, pp. 59-61, March. 

 19036. Hopkins, A. D.— Some of the principal insect enemies of coniferous forests in 



the United States.<Yearbook TJ. S. Dept. Agr. for 1902, pp. 265-282. 



1903. Felt, E. P.— Insects affecting forest trees.<7th Rep. Forest, Fish and Game 



Commissioners N. Y., pp. 480^81, 2 plates, figs. 1-3. 

 1903. Brichet, O., et Severin, G. — Le Dendroctonus micans, degats moyens pre- 



ventifs et destructif8.<Bul. Soc. Centr. Forest. Belg., X, pp. 244-258. 

 1903. Baudisch, Fr.— Tiber Dendroctonus micans Kug.<Centralbl. Ges. Porstwesen, 



Jahrgang 29, pp. 151-152. 



1903. Von Schrenk, Hermann.— The " bluing " and the "red-rot " of the western 



yellow pine, with special reference to the Black Hills Forest Beserve. 

 <Bu1. 36, Bur. Plant Industry, U. S. Dept. Agr., pp. 40, Pis. XIV. 



1904. Hopkins, A. D.— Catalogue of exhibits of insect enemies of forests and forest 



products at the Louisiana Purchase Exposition, St. Louis, Mo., 1904. <Bul. 

 48, Div. Ent., U. S. Dept. Agr., pp. 18, 19, 26, 41-44. 

 1904r-5. Quairierb, C. — Le Dendroctonus micans.<CBu{. Soc. Centr. Forest. Belg., 

 Tome 11, pp. 626-628; Tome 12, pp. 183-186. 



1905. Hopkins, A. D.— The Black Hills beetle, with further notes on its distribu- 



tion, life history, and methods of control.<Bul. 56, Bur. Ent.,U. S. Dept. 



Agr., pp. 1-24, Pis. I, II, figs. 1-6. 

 1905. QuiEvy, Prosper. — Le Dendroctonus micans, invasion. <^Bul. Soc. Centr. 



Forest. Belg., Tome 12, pp. 334-335. 

 1905. Felt, E. P. — Insects affecting park and woodland trees.^N. Y. State Mus., 



Mem. 8, vol. 1, pp. 6-7. 



1905. NiJssLiN, O. — Leitfaden der forstinsektenkunde, pp. 175-178, Berlin. 



1906a. Hopkins, A. D. — Barkbeetle depredations of some fifty years ago in the Pikes 



Peak region of Colorado.<Proc. Ent. Soc. Wash., VIII, Nos. 1-2, pp. 4-5, 



July 13. 

 1906c. Hopkins, A. D. — Notes on some Mexican Scolytidse, with descriptions of 



some new species.<Proc. Ent. Soc. Wash., VII, Nos. 2-3, pp. 71-81, 



January 10. 



1906. Webb, J. L. — Some insects injurious to forests. The western pine-destroying 



barkbeetle.<Bul. 58, Pt. II, Bur. Ent., U. S. Dept. Agr., pp. 17-30, Pis. II, 



III, figs. 7-12, August 18. 

 1906 Felt, E. P. — Insects affecting park and woodland trees.<N. Y. State Mus., 



Mem. 8, vol. 2. 

 1908. Hopkins, A. D. — Notable depredations by forest insects.<Yearbook U. S. 



Dept. Agr. for 1907, pp.- 149-164. 



1908. Severin, G. — Le genre Dendroctonu3.<Bul. Soc. Cent. Forest. Belg. Author's 



extra, pp. 1-20. Received May. 



1909. Hopkins, A. D. — Contributions toward a monograph of the Scolytid beetles. 



I. The genus Dendroctonus.<Tech. Ser. 17, Pt. I, Bur. Ent., U. S. Dept. 

 Agr., pp. 164, Pis. VIII, text figs. 95. 



o 



