NORTH AMERICAN HYMENOPTERA. 115 



SfOTES ©Sf BEKN, WITH D£S€RIPTIO]\fii OF 



WEW SPECIES. -Third Paper. 



BY CHARLP:S ROBERTSON. 



With the exception of a few species from Florida, the following 

 paper is based on the bees occurring in the neighborhood of Carlin- 

 ville, 111. It is intended to give descriptions of certain new species, 

 and of the still undescribed sexes of known species, with notes on 

 synonymy, etc., as well as to supplement the work of the author in 

 previous papers by indicating other characters by which the species 

 may be distinguished from those they nearly resemble. This paper 

 will be followed by another on the time of flight and the habits of 

 the local species. The synonymy and arrangement are based on 

 Cresson's Catalogue. 



€olletes iusequalis Say, Bost. Jour, i, 391, 1837 ; Colletes propinqua Cress., 

 Proc. Bost. Soc. Nat. Hist. xii. 165, 1868— see Patton, ibid, xx, 142 ; Colleten 

 canadensis Cress., ibid. 166. 



Say says that his species flies in March and April. I have taken 

 it from the 20th of March to the 28th of May, while the species 

 which Cresson has doubtfully referred to C. imequalis I have taken 

 only from the 30th of August to the 7th of October. This early 

 species, which agrees with Say's description of C. incequalw, I have 

 compared with the types of C. propinqua in the collection of the 

 American Entomological Society. I have also examined the types 

 of C. canadensis. A specimen which Mr. Cresson doul)tfu]ly referred 

 to C. canadensis is nothing, I think, but C. hnequalis. 



Colletes coini>acta Cress. 



This species may be most readily distinguished from the other 

 species known to me by its metathorax, which, instead of the usual 

 transverse series of pits, presents a rugose triangular enclosure. It 

 flies in Autumn. 



Colletes <Iistiucta Cress. 



The female closely resembles the male, but is more finely punc- 

 tured, the vertex and mesoscutum have more black hairs, and the 

 abdominal fascite are white, the fascia on first segment beino- con- 

 tinued upc/n base of second. I have taken this species in Florida. 



TRANS. AM. ENT. SOC. XXII. MAY. 1895. 



