42 Mr. T. D. A. Cockerell on Bees of the 



with very large irregular pits. Labrum with a deep elongate 

 median sulcus, bounded on each side by an elevation. Area 

 between eyes and base of mandibles about twice as broad as 

 long. Mesothorax shining, with large well-separated punc- 

 tures. Prothoracic spine long and conspicuous. Base of 

 metathorax with the usual transverse series of pits, rather 

 irregular, below which the triangle is transversely ridged, 

 with a rather feeble median longitudinal carina. The shiny 

 downward prolongation of the triangle is very narrow. 

 Lateral areas of the posterior truncation dull because minutely 

 roughened. Tegulre rufo-fuscous. Wings long (anterior 

 wing 10 millim.), smoky; nervures and stigma very dark 

 fuscous. Legs black, small ioints of tarsi inclinino: to dark 

 rufous. Pubescence of legs ordinary. Abdomen shiny, with 

 large close punctures; first segment sparsely clothed with 

 erect grey hairs, whicli on the other segments are replaced by 

 shorter inconspicuous hairs, becoming darker to black caudad. 

 Apical margins of segments 1 to 5 with even very conspic- 

 uous bands of white pubescence. The band is wholly lacking 

 on sixth segment. Pubescence of apex fuscous. Venter 

 with white bands like those of dorsum. 



IJah. West fork of Gila lliver, N. M., July 16, two males 

 {C. II. T. Townsend). 



It is to be regretted that the female of this, the largest New 

 Mexico CoUetes, is unknown. A specimen was compared by 

 Mr. Fox with the Cresson collection, and returned marked 

 " near propinqua.^'' From the male of imcqualis {propinqua) 

 it differs by its rather larger size, smooth vertex with sparse 

 punctures of two sizes (that of incvqualis being dull from the 

 very dense jmnctuationj, strung prothoracic spine, larger punc- 

 tures of abdomen, &c. 



C. Smaller species with ivcll-banded abdomen and without black 

 Jiairs on thorax, except in a vernal sjpecies (C. texana, Cr.). 



(1) Distance between eyes aud base of mandibles greater than breadth 



of latter. 



(«) Larger ; tips of mandibles blunter ; punctuation of first abdominal 

 segment stronger and closer. 



CoUetes Wootoni, sp. n. 



S . About 10 millim. long. 



Black, with long, rather dense, greyish-white pubescence, 

 tinged with ochreous on vertex and dorsum of thorax. Eyes 

 unusually prominent, giving the head an odd appearance 

 viewed from in front. Face and cheeks densely covered with 



