312 PROCEEDINGS OF THE NATIONAL MUSEUM vol.84 



It is pointed out elsewhere in this paper that Dalla Torre, through 

 misinterpretation of a statement by Provancher, erred in synonymizing 

 the female of this form with Arenatra rufipes Cresson. 



Female and male. — Differs from the variety exploratus only in having 

 the wings somewhat darker and the hind tarsus entirely black or at 

 most with the apical joints pale. 



Type locality. — Colorado. 



Type.— Xcad. Nat. Sci. Philadelphia no. 1607. 



Remarks. — Before me are specimens from Alberta, North Dakota, 

 Wyoming, Colorado, and New- Mexico, the last from an altitude of 

 8,000-8,200 feet in the White Mountains. All were captured during 

 July and August. Included are specimens in the Canadian National 

 Collection, Emory University, the American Aluseum of Natural 

 History, and the collection of Andrew R. Park, Jr. 



SPECIES NOT SEEN AND NOT INCLUDED IN KEY 



EXETASTES CAUDATUS (ProTancher) 



Banchus caudatus Provancher, Additions et corrections au volume ii de la 

 Faune entomologique du Canada . . ., p. 121, 1886; female. 



Exetastes caudatus (Provancher) Davis, Proc. Acad. Nat. Sci. Philadelphia, vol. 

 21, p. 189, 1894. 



The type of this species had been examined by both A. B. Gahan 

 and C. F. W. Muesebeck. Their notes together \vith the original 

 description suggest that the species is probably allied to scutellaris 

 Cresson. Both Gahan and Muesebeck noted the broad temples 

 characteristic of the scutellaris group. Within this group the short 

 malar space, as noted by Muesebeck, and the length of the ovipositor 

 and the hyaline wings recorded by Provancher throw it closest to 

 scutellaris. 



Type locality. — Anaheim, CaHf. 



Type. — Public Museum, Quebec. 



I have not seen the type nor have I been able to identify the species. 



U.S. eOVERNMENT PRINTINS OFFICE: I S37 



