THE GENUS DENDROCTONUS. 153 



In some sections of the country this beetle appears to be attracted 

 to the trunks of felled trees much more than in others, depending 

 probably on the species of tree and local conditions relating espe- 

 cially to the presence or absence of certain other insects which would 

 or would not interfere with the development of their broods. 



BASIS OF INFORMATION. 



Information in regard to this beetle is based on investigations by 

 the writer in West Virginia, at Romney, July, 1891; at Dellslow, 

 March and November, 1891; at Crow, April, 1893; in Randolph 

 County, in spruce forest, May, 1893; at Kanawha Station, July, 1903; 

 in North Carolina, at Fletchers, July and November, 1902; at Tryon, 

 July, 1902, March, 1903, and October, 1903; at Boardman, Novem- 

 ber, 1904; at Lumber, S. C, March, 1903; at Kirbyville, Tex., 

 November, 1902; on Long Island, New York, September, 1903; at 

 Roosevelt, W. Va., and Virginia Beach, Va., June, November, and 

 December, 1907; on investigations by Mr. W. F. Fiske in North 

 Carolina, at Tryon, March, April, May, and November, 1903, Novem- 

 ber, 1904, and March, May, and July, 1905; at Pisgah Ridge Moun- 

 tain, September, 1904; at Pink Beds, September, 1904, and May, 

 1905; at Biltmore, May, 1905; at Cornelia, Ga., November, 1903; at 

 Thomasville, Ga., March, 1905; at New Landing, S. C, August, 1903; 

 at Chicora, S. C, November, 1904; at Call, Tex., February, 1905, 

 and at Deweyville, Tex., March, 1905. Additional localities through 

 correspondence and from other collections are : New Brunswick and 

 Lakewood, N. J.; Islip, Long Island, New York; Calhoun, Ala.; Tark- 

 ington and Austin, Tex.; Tampa, Fla., and Marion County, Fla.; Glen 

 Allen and Fort Monroe, Va. Represented in the forest-insect collection 

 of this Bureau by over 400 specimens, including all stages and work. 



BIBLIOGRAPHY. 



(Refers to D. terebrans proper and not to D. valens Lee, which was often confused 



with it.) 



Le Baron, 1871; Packard, 1890, p. 721; Hopkins, 18936, p. 143; Hopkins, 1893c, 

 p. 213; Hopkins, 1894a, pp. 71-76; Hopkins, 1897a, p. 41; Hopkins, 1899a, pp. 

 302-393, 415, 421, 447; Smith, 1899, p. 364; Hopkins, 19026, p. 10; Hopkins, 1906c, 

 p. 81; Hopkins, 1909, pp. 147-150. 



No. 23. THE RED TURPENTINE BEETLE. 



(Dendroctonus valens Lec.° Figs. 97-102.) 



The red turpentine beetle is a large, stout, light to dark red, cylin- 

 drical barkbeetle, 5.7 to 9 mm. in length, with head broad, convex, lack- 

 ing grooves or longitudinal impressions; the pronotum broad, coarsely 



a Referred to under Dendroctonus terebrans in earlier literature. 



