No. 22.] HYMENOPTERA OF CONNECTICUT. 727 



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N. (Holonomada) imbricata Smith. 

 New Haven, 4 May, 1904 (H. L. V.). 



N. (H.) affabilis Robertson. 



N. (H.) vincta Robertson. 



N. (H.) placida Robertson. 



N. perplexa Cresson. 



*N. vicina Cresson. 



Salisbury, 27 August, 1904 (W. E. B.) ; Saybrook, 31 

 August, 1904 (H.L.V.). 



N. (Nomada) electa Cresson. 



N. (N.) illinojensis Robertson. 

 Branford, 11 May, 1905 (H. W. W.). 



N. (N.) rubicunda Olivier. N. torrida Smith. 



N. (N.) denticulata Robertson. 

 New Haven, 26 May, 1904 (H. L. V.). 



N. (N.) sayi Robertson. 



Branford, 3 May, 1905 (H. W. W.) ; West Haven, 27 June, 

 1905 (H. L. V.). 



N. (N.) bisignata Say. 



N. (N.) articulata Smith. 



N. (N.) gracilis Cresson. 



*N. (N.) pygmaea Cresson. 



N. (Heminomada) obliterata Cresson. 

 Hartford, 20 May, 1904 (H. L. V.). 



N. (Xanthidium) luteola LePeletier. 



N. (X.) festiva Cresson. 



Viereckella Swenk. 

 Only two species are known to belong to this genus. They 

 both look as if they might be black Nomadas. Indeed, the species 

 that occurs in this State was originally described as Nomada. 



V. pilosula (Cresson). 



Mandibles simple, without a tooth near apex; fj>re coxae 

 simple, without spines, uniformly black or brownish ; female 



