Colletes petalostemonis Swenk, 1906

Colletes petalostemonis Swenk, 1906a: 40 [♀,♂‚]

     Syntypes ♀,♂‚. USA, Nebraska, Sioux Co., Warbonnet Canon [Canyon], ♀ - 20 July 1901, ♂‚ 13 July 1901, by M. Cary, on Petalostemon candidus [University of Nebraska].

Notes on Type Material: Though Stephen (1954) mentioned the holotype, he did not indicate the sex or collection information of the specimen. Swenk (1906) did not indicate which of the two type specimens (1♀,1♂‚, with 7 additional paratypes), though the type material was listed as ♀, then ♂‚.