REVISION OF THE GENUS EXETASTES — CUSHMAN 311 



24, 1929; one male, Salisbury, Conn., July 10, 1926, W. E. Britton; 

 one female, Keene Valley, Essex County, N. Y., August 3, 1918, H. 

 Notman; and one male, Newcomb, N. Y., July 5, 1918. 



EXETASTES NEBVULUS var. RUFOFEMORATUS Provancher. new combination 



Exetastes rufofemoratus Provancher, Nat. Can., vol. 9, p. 212, 1877; vol. 11, 

 p. 210, 1879; Petite faune entomologique du Canada . . ., vol. 2, Hym^n., 

 p. 384, 1883, female. — Johnson, Biological survey of the Mount Desert 

 (Maine) region, pt. 1, Insects, p. 132, 1927. 



Female and male. — Like variety intermedins except that the hind 

 femur is bright ferruginous, sometimes more or less infuscate at apex. 

 In some specimens this variety varies toward the variety expoloratus 

 in that the hind basitarsus is slightly infuscate at base. 



Type locality. — Quebec? 



Type. — Public Museum, Quebec. 



Remarks. — Like intermedins this is a northeastern form, specimens 

 before me having been collected in the following States and Provinces: 

 Nova Scotia, New Brunswick, Quebec, Ontario, Maine, Vermont, 

 Massachusetts, New York, and IlUnois. Included are specimens in 

 the Canadian National Collection, Boston Society of Natural History, 

 American Museum of Natural History, Cornell University, and the 

 collection of the State entomologist at New Haven, Conn. 



It is in flight from about the middle of June to the middle of August. 



EXETASTES NEKVULUS var. EXPLORATUS Davis, new combination 



Exetastes exploratus Davis, Trans. Amer. Ent. Soc, vol. 24, p. 365, 1897; female, 

 male. 



Female and male. — Intermediate between the varieties rnjofemoratus 

 and niger. From the former it differs in the somewhat darker wings 

 and the largely black hind basitarsus; and from the latter in the 

 yellow hind tarsus with only the basitarsus black. 



Type locality. — South Dakota. 



Type. — Acad. Nat. Sci. Philadelphia no. 177. 



Remarks. — Originally described from South Dakota and Michigan, 

 this form is represented also by specimens from New Hampshire, 

 Illinois, Wisconsin, North Dakota, and British Columbia. All speci- 

 mens before me were captured during June, July, and August. The 

 series includes specimens in the Canadian National Collection, Ameri- 

 can Museum of Natural History, Boston Society of Natural History, 

 Emory University, and the collection of Andrew R. Park, Jr. 



EXETASTES NERVULUS var. NIGER Cresson, new combination 



Exetastes niger Cresson, Proc. Ent. Soc. Philadelphia, vol. 4, p. 275, 1865; female, 

 male. — Dalla Torre, Catalogus hymenopterorum . . ., vol. 3, pt. 1, 

 p. 73, 1901; male. 



Arenetra rufipes Dalla Torre, Catalogus hymenopterorum . . ., vol. 3, pt. 1, 

 p. 513, 1901; female (part). 



