THE CANADIAN ENTOMOLOGIST. 33 



SOME BEES FROM WESTERN CANADA. 



BY T. D. A. COCKERELL, UNIVERSITY OF COLORADO. 



I am indebted to Dr. C. Gordon Hewitt for the loan of a small 

 collection of bees obtained by Mr. T. N. Willing, of Regina, Saskatche- 

 wan. Although the number of species is not large, several are new to the 

 Canadian fauna, or otherwise of interest. It is in this region that the arid 

 transition zone enters Canada, and consequently, any one who will collect 

 diligently there is sure to find a considerable number of species not 

 otherwise known as Canadian. I have omitted from the list three species 

 of Andrena, two from Regina and one from Mortlach. I do not recognize 

 these at once, and it may be that some or all are new, but it does not seem 

 worth while to spend time on them until Mr. Viereck's paper on the genus 

 has been published. 



Colletes salidcola geranii CkW. — i (^ , Pincher, Alta., July to, 1904, 



Halictus leroiixii ruborum Ckll. — % , Mortlach, Sask., May 31. 



//a/ictus trizonaius Cress. — ? , Mortlach, May 31. 



Agaposiemon texa?ius Cress. — $ , Mortlach, May 31, 1909. 



Andrena cockerelli Grgen. — ? , Lipton, Sask., June 5, 1907. 



Halictoides niaurui Cress. — 9, Kinistino, Sask., July 26, 1907. 



Coelioxys ribis Ckli. — $, Prince Albert, Sask., July 27, 1907. Like 

 the male of C. ribis kiticaidi, but hair a purer white, and scutellum 

 subangulate in middle, with the lateral teeth short as in ribis 9 • 



Osmia tiovomexicana Ckll. — Medicine Hat, Alta., one ? , May 30, 

 1904. 



Anthidium tenuiflorce Ckll. — ? , Radisson, July 29, 1907 ; ^ , Suks- 

 town, July 18, 1909. 



Megachile calogaster QYW. — 9, Meota, Sask., July 8, 1906; $, 

 Swarthmore, July 15, 1910; $, Macleod, July 2, 1904. 



Megachile manifesta Cress. — $, Davidson, Aug. 21, 1907. 



Megachile (Sayaphis) pugnata Say. — ^, Radisson, July 29. 



Megachile (Anthemois) infragilis Cress. — ^, Regina, July 11, 1909. 

 A form with the light hair yellowish-white. Anterior coxse with no spines. 



Megachile relativa Cress. — Four ? 's, three from Regina, Aug. 24, 

 Sept. 4 and 7, one from Davidson, Aug. 21. Peculiar for haviijg the hair 

 on last dorsal abdominal segment partly or mainly black instead of orange. 



Megachile latimaniis Say. — ? , Regina, Aug. 15. 



Melissodes cofifusa Cress. — Males from Meota, Sask., July 8; Macleod, 

 July 8 ; Radisson, July 29 ; Prince Albert, July 28. 



January, 1911 



