Studies of North American Bees g$ 



1911. Nomada caroHnae Cockerell, Proc. U. S. Nat. Mus., XXXIX, p. 

 656, .?. 



This species was originally described by Cockerell from two 

 females from North Carolina, and he has since recorded it from 

 Virginia and Texas. The specimens before the writer are the 

 same as a female from Longview, Texas, determined as N . caro- 

 Hnae by Cockerell now in the U. S. National Museum collection. 

 In Nebraska this species is beyond doubt our commonest species 

 of this subgenus, and is represented by a series of forty females 

 and one hundred and thirty-nine males. The latter sex has never 

 been described but it can easily be recognized by the characters 

 given in the preceding key to the Nebraska species. The allotype 

 is a specimen selected from a series of fifteen males collected 

 with two females at Lincoln, April 13. The species flies from 

 April 13 to May 17, but is the most abundant in latter April, 

 thus corresponding exactly with the season of A^. lepida. It has 

 been collected in much the same localities as A'^. lepida — Lincoln, 

 West Point, Cedar Bluffs, Bellevue, Falls City and Indianola — 

 except that it has not been found in Sioux county, and visits 

 practically the same flowers as lepida, having been taken on Ribes 

 gracile, Salix nigra, Primus auiericana, Fragaria virginiana, 

 and cultivated plum and apricot. It is, however, perfectly dis- 

 tinct from A^. lepida and is much less variable in its markings than 

 that species. A variety from Dickinson, North Dakota, May 8, 

 1912, on SaUx (C. H. Waldron: Stevens No. 3192) has the 

 apical margins of tergite 1-4 broadly and strongly dusky, but does 

 not otherwise differ from Nebraska material. 



Nomada (Gnathias) albofasciata Smith. 



1879. Nomada albofasciata Smith, Nezu Species of Hymenoptera in 



the British Museum, p. 100, c^. 

 1903. Nomada albofasciata Cockerell, Proc. Acad. Nat. Sci. Phil., p. 



602, c?. 

 1905. Nomada (Gnathias) albofasciata Cockerell, Bull. 94, Colorado 



Exp. Sta., p. 75, c?. 

 1905. Nomada (Gnathias) albofasciata Cockerell, Trans. Am. Ent. 



Soc, XXXI, p. 312, 3. 



Cockerell has examined Smith's type of albofasciata in the 



95 



