JUN 2 1897 



NORTH AMERICAN BEES— DESCRIPTIONS AND 

 SYNONYMS.* 



Charles Robertson. 



Prosopis F. 



Prosopis illinoensis Rob. 



Prosopis Illinoisensis Robertson, Canadian Entomologist, XXVIII, 138, 



C?, 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, tf, 1891 



(nee Mocs.). 

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



Colletes brevicornis $A 



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 

 lonor 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) 



