NOTES ON AMEEICAN BEES. 155 



with the anterior margin not ernarginate ; labrum with a row of weak 

 pits ; apical portion of mandibles dark reddish ; space between base of 

 mandible and eye very short, almost reduced to nothing ; mesothorax 

 with large and very strong punctures, dense in front, less so behind, 

 hind part of disc without punctures ; scutellum impunctate in front, 

 with large punctures behind ; post-scutellum coarsely roughened ; 

 basal enclosure of metathorax narrow, bounded by a sharp rim, and 

 crossed at intervals by sharp ridges ; posterior face roughened, almost 

 malleate ; pleura with very dense large punctures ; prothoracic spine 

 long and sharp ; pubescence of thorax white at sides, dense on 

 tubercles and on sides of metathorax, black just beneath the tegulte, 

 on dorsum thin but strongly plumose, black mixed with greyish white, 

 the white conspicuous at the suture between mesothorax and scutellum, 

 and (greyish) on post-scutellum, the black most conspicuous on the 

 scutellum ; tegulse shining piceous ; wings hyaline, nervures and 

 stigma black ; stigma small, marginal cell with an appendicular ner- 

 vure, second submarginal cell about as long as third, third narrowed 

 about one-half to marginal, second recurrent nervure strongly bent ; 

 legs with white pubescence ; hind femora with an abundant, white, 

 beautifully plumose floccus ; second joint of hind tarsi triangular ; 

 abdomen broad, very shiny, minutely but strongly and quite closely 

 punctured, except on anterior part of disc of first segment ; segments 

 nude, except very narrow snow-white apical bands, and white hair at 

 base and sides of first segment, and a few scattered black hairs on the 

 apical segments ; venter with a very thin hoary pubescence. 



Hab. San Eafael, on the Eio Nautla, State of Vera Cruz, 

 Mexico, last of June. (C. H. T. Toivnsend.) This has less 

 black hair than C. cethiops, and the abdomen is not " rapidly 

 narrowed to apex." It has no trace of the dense ochraceous 

 pubescence found on the breast of C. mexicanus. Curiously, 

 C. nautlanus has a very strong resemblance to C. nudus, Bob., 

 from Illinois, differing, however, by the shining and closely 

 punctured abdomen. 



Colletes gilensis, Ckll. — $ . Prude's Summit, White Moun- 

 tains, N. M., July 29th, 1898. (<7. M. Barber.) Prude's Summit 

 is not on the maps ; it is the top of the divide between Euidoso 

 and Mescalero. 



Colletes bigelovice, Ckll.— $ . Prude's Summit, White Moun- 

 tains, N. M., July 29th, 1898. (C. M. Barber.) My original 

 types were badly worn ; a new specimen, in excellent condition, 

 has a shiny black abdomen, with very distinct but narrow snow- 

 white bands on the apical margins of the segments, interrupted 

 in the middle on the first. The punctures of the abdomen are 

 very much smaller than in C. gilensis. The third discoidal cell 

 is much less bulging at its end than in C. nautlanus. 



Nomada edwardsii, Cresson, 1878. — Mr. T. Kincaid sends me 

 eighteen specimens ; three from Seattle, Wash. — two males, May 

 13th, one female, May 17th, 1896 ; the rest from Olympia, 



