NEW NORTH AMERICAN SPECIES OF BEES BELONGING 

 TO THE GENUS HALICTUS (CHLORALICTUS) . 



By Grace Adelbert Sandhouse, 



of the University of Colorado, Boulder. 



INTRODUCTION. 



Since the name Chloralictus was suggested by Robertson in 1902 

 for certain of the metallic-colored Halictine bees, many interesting new 

 species have been added to this subgenus. The Rocky Mountain 

 States, with their very diverse habitats, have yielded a majority of 

 the species, and still continue to yield many species. Through the 

 efforts of Robertson considerable knowledge of the CMoralicti of 

 Illinois has been given us, and the Chloralictus fauna of the east- 

 central States seems to be quite like that of Illinois. The number 

 of species reported from the vSouthern States has been remarkably 

 small, a few having been recorded from Florida. In the Pacific 

 States, California has yielded several very interesting species. 



In the collection of Prof. T. D. A. Cockerell, of the University of 

 Colorado, is a number of Chloralictus — both male and females — from 

 widely separated localities. Durmg the last year the writer has been 

 privileged to work up this collection under the supervision of Pro- 

 fessor Cockerell. The result has been an unusually large number of 

 new species. In very few cases were there representatives of the two 

 sexes from one locality; or, if so represented, the differences between 

 the sexes were so great that it was not considered advisable to at- 

 tempt to match them until further data were obtained. Keys have 

 been compiled for all of the species represented in Professor Cock- 

 erell's collection as well as the new species, but it was not found prac- 

 ticable to include in these key species known only from descriptions. 



KEY TO FEMALES OF HALICTUS (CHLORALICTUS).' 



Comparatively large, anterior wing at least 6 mm. long; wings somewhat dusky, 



except in connexus 1 



Smaller species, usually with paler wings 9 



1. Abdomen blue or green 2 



Abdomen black 4 



' See second paragraph of introduction for statement of species included in this key. 



No. 2532 — Proceedings U. S. National Museum. Vol. 65, Art. 19. 

 45554— 25— Proc.N.M.vol.65 38 1 



