292 PROCEEDINGS OF THE NATIONAL MUSEUM. vol .38. 



merely be due to insufficient acquaintance with the numerous Asiatic 

 and African species. 



In connection with the evident relationship of the Nbmiines to the 

 llalictines, it is interesting to note that some of the latter haVe 

 ivory-colored or yellowish tegumentary abdominal bands; such arc 

 Halictus cittatus Smith from Soutli Africa and //. fiavovittatus W. 

 F. Kirby from Socotra. 



Nomia is doubtless of Old World origin, probably reaching America 

 in later miocene times. Two species, A. jenseni Friese and A' 

 jorgenseni Friese, have recently been described from Argentina, but 

 Vachal points out that they have collet id mouth parts, and refers 

 them to his genus Lonchopria. They are very beautiful insects, 

 with light tegumentary abdominal bands in the manner of Paranornin , 

 but the male antennae are short, and neither the metathorax nor the 

 venter of the abdomen are constructed as in Nomia. 



GROUP OF NOMIA NEVADENSIS. 



Rather small species, the abdomen without iridescent hands; male 

 with the hind tibia broad, its inner edge with the apical half broadly 

 excavated; tegulae and tubercles not enlarged. 



(A) Abdomen wholly or largely bright ferruginous. 



Nomia n< radensis Cresson. Described from Nevada, and ranges 

 through Arizona into New Mexico, where it is common in the middle 

 Sonoran /one at flowers of various composite, as Bahia dissecta, 

 Leucosyris spinosa and Isocoma wrightii. 



(B) Abdomen dark. 



Nomia bakeri Cockerell. Found in Colorado, at Denver and 

 Boulder. Mrs. Bennett has collected it at flowers of Solidogo. 



NOMIA PATTONI, new species. 



Nomia /><iU(>nl Ashmead MS. (No description.) 

 Closely related to A', bakeri, but smaller (size of N. arizonensis) , 

 the female with the femora red, as well as the tibia' and tarsi, the 

 antenna' also red. In the male, the face is narrower below; the hind 

 legs, though paler, do not differ in structure, and the male antenna 1 

 are practically the same in both. There are no tangible differences 

 in sculpture. The length of the anterior wing is a rather scant 8 nun. 

 At fust sight. A', pattoni looks like A', (iri~ont lists, but it agrees with 

 bakeri and differs from arizonesis in the character of the basal area 

 of metathorax, which is rather large, and more or less boat-shaped, 

 instead of narrowly crescentic. A', /xiftonl is also readily known from 

 arizonesis by the color of the legs, the more densely punctured meso- 

 thorax, and the absence of an evident subbasal constriction on the 

 second abdominal segment of the female. It may perhaps prove to 



