NAMES APPLIED TO BEES OF THE GENUS NOMADA, FOUND IN NORTH A^IERICA.^ By T. D. A. COCKERELL, Of the University of Colorado, Boulder. Having recently had occasion to classify a large number of Nomada for the United States National Museum, I have thought it useful to present for publication a list of the names applied to the American species of this genus. The need for such a list is evident, none hav-ing appeared since that of Cresson, published in 1887, which included only 73 names. All the names are cited in alphabetical order, followed by the name of the author and date of publication. Whenever known, the type-locality is given, and also the name of the collector of the type. References are also made to all the principal synoptic tables, which are enumerated below, and referred to by number in the list. SUBGENERA AND SECTIONS. Gnathias Robertson, 1903. Species with an inner tooth on the mandibles; includes N. cuneata, ovata, bella, washingtoni, grayi, rhodomelas, etc. Cephen Robertson, 1903. Scape of male normal; front coxse of female with long pubescent spines. Tyjpe. — N. texana; also includes /eri'ttZa, etc. Centrias Robertson, 1903. Scape of male robust; front coxae of female with long pubescent spines. Type. — N. erigeronis. Phor Robertson, 1903, Type. — N. integra. Also includes iV. subgracilis. Heminomada Cockerell, 1902. Type. — N. obliterata. Micronomada Cockerell and Atkins, 1902. Species of the type of N. modesta. Xanthidium Robertson, 1903. Species of the type of N. luteola; includes N. civilis, citrina, dentarise, etc. Holonomada Robertson, 1903. N. superba and its allies; includes N. edwardsii, vinnula, vincta, affabilis, etc. 1 The asterisk (*) indicates that the species is in the collection of the United States National Museum. Specimens sent to the Museum by Prof. T. D. A. Coclierell labeled as cotypes are considered as paratypes, as Professor Coclierell uses the word "cotype" in the sense that the Museum uses the word "paratype." Of the 273 names in this list, representatives of 112 are in the Museum collection. The Museum collection contains types of 44 of the species and paratypes of 7 additional ones. The catalogue number of the type or paratype, when in the United States National Museum, has been added after the other information. — S. A. ROHWER. Proceedings U. S. National Museum, Vol. 41— No. 1852. 94428°— Proc.N.M. vol.41— 11 15 225
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