252 ENTOMOLOGICAL NEWS. [Sept., '04 



with short whitish pubescence, longer, dense and bristly on posterior 

 femora and tibiae, the inner apices of tarsal joints with rufous fringes. 

 Claws ferruginous, tibial spurs paler ferruginous, the inner one with 

 numerous minute but distinct pectinations. Abdomen dullish, the whole 

 surface coarsely and closely punctured with punctures a little finer than 

 those on mesothorax, the first segment somewhat striate punctate espe- 

 cially laterally, medially with a well defined ridge on posterior half, its 

 apical margin depressed, with a very dense, white pubescent fascia con- 

 cealing a smooth subtestaceous surface ; second and following segments 

 similarly punctured, apical margins of 2-4 similarly depressed, with simi- 

 lar fasciae, 5 depressed but its fascia narrower and less dense, apex with 

 pale pubescence. Other than the fasciae the abdomen is but inconspicu- 

 ously pubescent, all hairs pale. Venter similarly but much more finely 

 punctured, with dense pale pubescence forming a scopa, pollen-bearing 

 on three basal segments, no decided fasciae. 



(^. Length 9K-13 mm. Similar to 9 except as follows : — Thorax 

 above with rather long and erect pubescence, densest on margins and 

 tegulae, longer on scutellum and sides of metathorax, all grayish white ; 

 occiput and cheeks with long white pubescence ; clypeus covered with 

 pale pubescence, punctured similarly to, but, except at apex, much finer 

 than in 9 ; antennae long, flagellum varying from black to bright testaceous 

 beneath, basal joint less than one-half as long as second ; vertex crowded 

 with coarse punctures ; malar space better defined, but still very short ; 

 labrum with the deep median groove, but lateral ones subobsolete ; man- 

 dibles often largely rufous, especially terminally ; prothoracic spine less 

 conspicuous ; punctures on mesothorax more separated, a rather large, 

 shining, impunctate space on disk ; metathorax with a poorly defined 

 superior face and an imperfect, irregular series of subrectangular pits, 

 longer than broad and slightly shiny ; legs more or less ferruginous, all 

 the tarsi brightly so, that on tibiae and femora of variable amount, gener- 

 ally dull ; anterior femora with a long, dense, white beard ; punctures on 

 abdomen generally separate, not striate, median ridge on first segment 

 obsolete, fasciae on segments 1-6 ; venter often testaceous, no scopa. 



Specimens examined. — Types: $, Neligh, Neb., August, 

 1899, at Petalostemon (M. Gary) ; $ , Dundy Co., Neb., June 

 (E. H. Jones). Cotypes : 9 , Las Vegas, N. M., at Petaloste- 

 mon catididus, July 21 (T. D. A. Cockerell) ; do., at Solidago 

 canadensis, August 11 (W. P. Cockerell); 15 S S, Dundy 

 Co., Neb., June (E. H. Jones); 9 , '^ , Morton Co., Kan., 

 3200 feet, June, 1902 (F. H. Snow) ; 9 , Hamilton Co., Kan., 

 3350 feet (F. H. Snow) ; % , Clark Co., Kan., 1962 feet. June 

 (F. H. Snow), A bee of the semi-arid interior. 



The 9 of robustus ma)' be distinguished from the other 



