236 BULLETIN" 14 5, UNITED STATES NATIONAL MUSEUM 



and with a longitudinal vitta of more densely placed, silvery white 

 hairs on each side of the middle ; vertical portions of the segments 

 densely clothed with short, whitish pubescence ; first segment convex 

 at middle ; pygidium not distinctly carinate at middle. Presternum 

 coarsely, rather densely rugose and punctate, and rather densely 

 clothed with moderately long, recumbent, whitish hairs; prosternal 

 lobe broad, strongly declivous, and broadly rounded in front; pro- 

 sternal process broad, the sides nearly parallel to behind the coxal cavi- 

 ties, then feebly narrowed to the apex. Tibiae slender, straight, and 

 unarmed at apex. Posterior tarsi distinctly shorter than tibiae, and 

 the first joint about as long as the following two joints united. Tarsal 

 claws similar on all feet, cleft near middle, the inner tooth distinctly 

 shorter than outer one, and not turned inward. 



Length, 7.4 mm. ; width, 2.1 mm. 



Male. — Differs from the female in having the head narrower in 

 front, and usually more densely pubescent; antennae extending to 

 middle of pronotum, and the outer joints vaguely longer than wide; 

 presternum densely clothed with long, erect, whitish hairs; first ab- 

 dominal segment feebly, broadly, longitudinally concave at middle; 

 anterior and middle tibiae armed with a short tooth on inner margin 

 at apex; posterior tarsi slightly shorter than tibiae, and the tarsal 

 claws dissimilar, anterior and middle claws cleft near the tip, the 

 teeth acute and nearly subequal in length, posterior claws cleft near 

 middle, the inner tooth broad, shorter than outer one, and not turned 

 inward. 



Redescribed from the type (female) in the collection of Dr. A. 

 Fenyes. 



Type localities. — Of gibbicollis, San Bernardino, Calif. Of mer- 

 curius, Deming, N. Mex. ; type in collection of H. F. Wickham. 



DISTRIBUTION 



Material examined : 



Arizona: Flagstaff, July 3 (Barber and Schwarz). Southern part, August, 1902 

 (F. H. Snow). Indian Gardens, Grand Canyon, July 13 (H. F. Wickham). 



California: San Bernardino. June, 1897 (A. Fenyes). San Diego County (H. C. 

 Fall). Independence, July 17 (H. F. Wickham). 



New Mexico: Deming, July 18-August 18 (H. F. Wickham). Roswell, July 23, 

 1925 (Rehn and Hebard). Magdalena (Strickler). Koehler, July 23 

 (D. J. Caffrey). Magdalena Mountains, August, 1894; Socorro County, 

 August, 1894 (F. H. Snow). Albuquerque, June 27 (H. F. Wickham). 



Texas: Loma, July 7, 1908 ( ). Chisos Mountains, Brewster County, June 



10-12, 1908 (Mitchell and Cushman). Devil's River, May 3, 1907 (F. C. 

 Pratt). 



Utah: Zion Canyon, North Fork Virgin River, 4,450 feet, July 26-28, 1921 (W. 

 Knaus). Chad's Ranch, July 22 (H. F. Wickham). 



Wyoming: Sheridan, July 6, 1896 (R. P. Currie). 



