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., IT. 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., IT. 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. 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. < Bui. 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 IT. 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., IT. S. Dept. 

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



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