THE GENUS DENDROCTONUS. 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 U. 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. 480-481, 2 plates, figs. 1-3. 
1903. Brichet, O., et Severin, G. — Le Dendroctonus micans, degats moyens pre- 
ventifs et destructifs.<Bul. Soc. Centr. Forest. Belg., X, pp. 244-258. 
1903. Baudisch, Fr. — Uber. Dendroctonus micans Kug.<Centralbl. Ges. Forstwesen, 
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 Reserve. 
<Bul. 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. 
1904-5. Quairiere, C. — Le Dendroctonus micans. <Bul. 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. < Bui. 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. Nusslin, 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 Scolytidae, 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., IT. 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 Dendroctonus. <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 
