The Canadian Entomologist
In a paper on the bees of Nebraska, Messra Swenk and Cockerell say that a comparison of cotypes of Panurginus nebrascensis with specimens of P. ornatipes shows that the two are synonyms and that P. boylei is a subspecies. The types of all of the involved species being in the collections of the U.S. National Museum has led to a re-examination of them and the characters given show them to be abundantly distinct. In view of these characters, what Messrs. Swenck and Cockerell has under the name ornatipes is somewhat of a mystery.
Crawford, J. C., "On the Status of Some Species of the Genus Panurginus" (1912). Co. Paper 194.