176 Psyche [December 



costa slightly more than twice as long as the second; third three- 

 fourths as long as the second; second vein ascending rather sharply 

 to the costa; fourth vein curved at the base, but nearly straight 

 beyond, fifth and sixth sinuous; seventh distinct, long. Halteres 

 pale yellow. 



One specimen from Kent, Me., August 19, collected by Mr. 

 C. W. Johnson. Type in the collection of the Boston Society of 

 Natural History. 



This species is related to projecta Becker which also occurs 

 generally through New England (Boston, Mass.; Brookline, Mass.; 

 Hanover, N. H.), but differs by having the lower pair of proclinate 

 bristles weaker and the palpi less noticeably enlarged in the male 

 as well as by the absence of a fringe of hairs on the posterior fe- 

 mora and the presence of only two scutellar bristles. It is also 

 much like the Em^opean A. hortensis Wood, but the hypopygium 

 is bristly. 



THE PANURGINE BEES OF THE GENERA HESPERAPIS, 

 ZACESTA AND PANURGOMIA. 



By T. D. a. Cockerell, 

 University of Colorado, Boulder, Colorado. 



The genus Hesperapis CklL, 1898, was based on H. elegantula 

 Ckll. from New Mexico. At the present time seven species are 

 assigned to it, the range of the genus being from New Mexico to 

 Southern California. The following table separates the known 

 forms : 



Thorax above with moss-like ochraceous hair; abdomen dull ferru- 

 ginous elegantula Ckll. 



Thorax with ordinary pubescence; abdomen not red 1 



1. Area of metathorax dull, or only the apical part shining 2 



Area of metathorax polished and shining 3 



2. Mesothorax strongly and closely punctured, somewhat shining; 



male about 11.5 mm. long eumorpha (Ckll.) 



Mesothorax and scutellum shining, polished, finely punctured; 



male a little over 6 mm. long nitidula Ckll. 



Mesothorax and scutellum dull, not evidently punctured 



semirudis Ckll. 



