NORTH AMERICAN BEES— DESCRIPTIONS AND 



SYNONYMS.* 



Charles Robertson. 



Prosopis F. 



Prosopis illinoensis Rob. 



Prosopis Illinoisensis Robertson, Canadian Entomologist, XXVIII, 138, 



(^, 1896. 



The spelling of this name in the place cited is a typographi- 

 cal error. 



Colletes Latr. 



COLLETES ROBERTSONII D. T. 



Colletes punctata Robertson, Trans. Am. Ent, Soc. XVIII, 62, (^, 1891 



(nee Moos.). 

 Colletes robertsonii Dalla Torre, Cat. Hym. X, 44, 1896. 



COLLETES BREVICORNIS ^^.f 



Black, clothed with rather long, thin whitish pubescence; 

 vertex shining, sparsely punctured; clypeus densely punc- 

 tured, convex ; labrum with two median tubercles ; mandibles, 

 except base, rufous ; antennae short, third joint longest, 

 clavate; mesonotum and scutellum shining, rather strongly 

 punctured, more sparsely on the disc; metathorax with the 

 usual transverse series of pits, a triangular shining space be- 

 yond, otherwise reticulated, but surface nearly concealed by 

 long pubescence; wings hyaline, nervures and stigma testa- 

 ceous, tegulae dull; legs slender, black, with long whitish 

 pubescence, especially on anterior femora and tibiae ; apical 

 joints and spurs ferruginous ; abdomen shining at base, which 

 is rather strongly punctured, the punctures more dense and 

 finer on following segments ; bases of second and third seg- 

 ments somewhat constricted ; apical margins of first and sec- 



* Presented by title April 5, 1897. 



t All names not followed by author's initial are of new species. 



(315) 



