A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 95 



Elytra slightly wider than pronotum, nearly twice as long as wide ; base of 

 each elytron not abruptly angulated at middle, but oblique externally; sides 

 nearly parallel from humeral angles to apical third, then arcuately converging 

 to tips, which are separately broadly rounded ; lateral margins coarsely ser- 

 rate ; basal depressions broad and very deep; humeral depressions broad and 

 shallow; surface glabrous,- uneven, coarsely, deeply, irregularly ocellate-punc- 

 tate, intervals finely granulose. Each elytron with the first costa strongly 

 elevated from apex to middle, with numerous irregular, sparsely punctured, 

 elevated spaces, and with large, transverse, irregular, densely punctured areas. 



Abdomen beneath coarsely, sparsely, irregularly fossulate-punctajte, more 

 densely punctate at sides, sparsely clothed with short, recumbent, white hairs, 

 with distinct, smooth, lateral callosities, intervals indistinctly granulose ; last 

 visible sternite broadly, deeply, arcuately emarginate at apex, with a slightly 

 serrate, submarginal ridge, lateral margins coarsely serrate; eighth tergite 

 slightly emarginate at apex, coarsely, sparsely punctate, but not longitudinally 

 carinate. Prosternum coarsely, confluently punctate, slightly rugose anteri- 

 orly, with a narrow, smooth, median space, rather densely clothed with long, 

 semierect, white hairs; anterior margin arcuately rounded at middle, but with- 

 out a distinct median lobe. Anterior femur with a short, obtuse tooth, which 

 is dentate on outer margin. Anterior tibia slightly arcuate, with a large, acutely 

 triangular tooth at apical third ; middle tibia slightly arcuate, and slightly 

 expanded at apex ; posterior tibia straight. 



Length 7.5 mm., width 3 mm. 



Redescribed from the male lectotype, No. 3431, in the Academy of 

 Natural Sciences of Philadelphia. 



Female. — Differing from the male in having the front of the head uniformly 

 reddish cupreous, moderately convex, and more sparsely punctured and less 

 pubescent, the antenna uniformly piceous, the last visible sternite more elon- 

 gate, and narrowly, arcuately emarginate at apex, the eighth tergite coarsely, 

 densely punctured, the prosternum coarsely, sparsely punctured and sparsely 

 pubescent, the anterior tibia unarmed, and the middle tibia straight. 



Type locality. — Of ignicollis, Colorado, no definite locality. Of 

 scotti, Taos, N. Mex. ; type in the collection of W. J. Chamberlin. 



DISTRIBUTION 



From material examined : 



Arizona: Santa Catalina Mountains (M. Chrisman, and F. C. Craighead). Rock 

 Canyon and Sabino Canyon (G. Hofer). Santa Rita Mountains, June 6 

 (Hubbard and Schwarz). Miller Canyon, Huachuca Mountains, June 7, 

 1907 (H. A. Kaeber). Ash Fork, June 18;' Bright Angel, July 10 (Barber 

 and Schwarz). Palmerlee, Cochise County, July. White Mountains, July 

 11, 1936 (F. H. Parker). 



Colorado: No definite locality (Hubbard and Schwarz). Fort Garland (A. D. 

 Hopkins). 



Idaho: Pocatello, June 24, 1904 (E. S. G. Titus). 



New Mexico: Meek, April 27, 1907 (W. F. Fiske). Capitan, July 26, 1907 (J. L. 

 Webb). Coolidge (H. F. Wickham). Santa Fe, May 6 (H. S. Barber). 

 Taos, type scotti (F. T. Scott). 



Texas : No definite locality (Belfrage). Montell, April 2, 1907 (W. F. Fiske). 



Utah : Beaver Creek Hills and South Creek, Beaver County, June. Green Canyon, 

 April 22, 1934 (T. O. Thatcher). St. George, May 28, 1935 (E. C. Van Dyke). 

 Mt. Carmel, March 30, 1934 (D. De Leon). 



Chamberlin (1926) records it from other localities in Arizona, 

 Colorado, New Mexico, and Utah, and also from California and 

 Nevada, but no specimens have been examined by the writer from 

 California or Nevada. 



