8 Myron Harmon Szvenk 



illustrating an intermediate coloration between the Manhattan 

 specimen and the two females from Lincoln, Nebraska. 



Nomada (Nomada) cymbalariae Cockerell, var. 



A female specimen from Estes Park, Colorado, July, 1892 

 (F. H. Snow), seems best referable here. It differs, however, 

 from the description of the type in that the mesoscutum has 

 narrow lateral lines as well as a broad median line, the hair on 

 inner side of hind basitarsi pale, the yellow marks on tergites 

 2-4 large and emarginate on posterior margin, the emargination 

 cutting through on 4, the spots on 5 coalesced niesad but with 

 small spots cut off at extreme sides of 5. It is distinguished 

 from N. lutcopicta Ckll. J, by the oddly shaped black marks at 

 base of tergite i, the lateral mesoscutal lines, the yellow spots on 

 tergites i and 2 more pointed mesad, the interrupted yellow band 

 on tergite 4 and isolated yellow lateral spots on 4 and 5. TV. 

 leivisi Ckll. $, differs in the yellow lower corners of the face, lack 

 of black on base of tergite i, separation of median spots and 

 lack of lateral spots on tergite 5 and dark hair on inner side of 

 hind basitarsi. N. oregonica Ckll. 5, differs in the much reduced 

 abdominal spotting but agrees in the trilineate mesoscutum. 

 These species, with possibly a few others, form a group, char- 

 acterized by the low, convex, scarcely bilobed mesoscutellum and 

 the third antennal joint being nearly as long as fourth, allied to 

 the eastern, more blackish N. simplex Roh. Probably when more 

 material is examined the number of recognized species in this 

 group will be reduced, but for the present they had better all 

 stand as distinct. 



Nomada (Nomada) accepta Cresson. 



A female specimen from Colorado (207, Snow) is in the 

 Kansas University collection. 



Nomada (Nomada) vicina Cresson. 



This species is added to the Nebraska list through a male col- 

 lected at Omaha, September 8, 1913, on Solidago (L. T. Wil- 

 liams). It agrees well with Cresson's characterization and runs 

 to vicina in Robertson's table. .A character not mentioned by 



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