. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE GENUS DENDROCTONUS. 49 BASIS OF INFORMATION. The preceding information on the western pine beetle is based on investigations by the writer at McCloud, Cal., at Grants Pass, Oreg., near Spokane, Wash., and at Moscow, Idaho, April and June, 1899, and in the Yosemite National Park and Yosemite Valley, California, June, 1904; by Mr. J. L. Webb, at Moscow and Troy, Idaho, Septem- ber and October, 1900, and at Centerville, Stites, Kooskia, Grimes, Placerville, and Smiths Ferry, Idaho, April to September, 1905; by M
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE GENUS DENDROCTONUS. 49 BASIS OF INFORMATION. The preceding information on the western pine beetle is based on investigations by the writer at McCloud, Cal., at Grants Pass, Oreg., near Spokane, Wash., and at Moscow, Idaho, April and June, 1899, and in the Yosemite National Park and Yosemite Valley, California, June, 1904; by Mr. J. L. Webb, at Moscow and Troy, Idaho, Septem- ber and October, 1900, and at Centerville, Stites, Kooskia, Grimes, Placerville, and Smiths Ferry, Idaho, April to September, 1905; by Mr. H. E. Burke, at Smiths Ferry, Idaho, October, 1904, in the Yosem- ite National Park, at Wawona, and in the Yosemite Valley, Califor- nia, June to August, 1906, and at Joseph, Oreg., in 1907, and by Mr. V. S. Barber, at Sterling and Chester, Cal., in 1908. Additional localities through correspondence and from other collections are Badger, Ballard, and the Santa Barbara Na- tional Forest, Cal.; Winthrop and Auburn, Wash.; Pokegama, Oreg., and Missoula, Mont. The species is represented in the forest-insect collection of the Bureau of Entomology by sev- eral hundred specimens. BIBLIOGRAPHY. Hopkins, 1899a, p. 395; Hopkins, 18996, pp. 13, 20, 26; Hopkins, 19016, pp. 66, 67; Hopkins, 1902c, p. 21; Hopkins, 1904, p. 18; Webb, 1906, pp. 17-30; Hopkins, 1907, pp. 162-163; Hopkins, 1909, pp. No. 2. THE SOUTHWESTERN PINE BEETLE. (Dendroctonus barberi Hopk. Figs. 12-14.) Fig. 12.—The southwest- ern pine beetle (Den- droctonus barberi): Adult. Greatly enlarg- ed. (Author's illustra- tion.) The southwestern pine beetle is a small, rather stout, light to dark brown barkbeetle, from to mm. in length, with a broad grooved head, sides of the pro- thorax slightly narrow toward the head, elytra with moderately coarse rugosities, and elytra and declivity without long hairs. (See fig. 12.) It attacks healthy, injured, and felled western yellow pine in southern Colorado and Utah
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