EEVISION OF THE GENUS EXETASTES — CUSHMAN 283 



beck, the following material has been examined: A large series of 

 both sexes collected by G. S. Walley at Kazubazua, Quebec, on July 

 26 and 27, 1933; one female, Aylmer, Quebec, on July 20, 1924, H. 

 L. Viereck; one female, Canada, C. F. Baker; one female. West 

 Chop, Mass., July 8, 1893; one female, Forest Hills, Mass., June 22, 

 1921; and four females, Nantucket, Mass., July 21 to August 17, 

 1927, C. W. Johnson. Specimens of this species are in the Canadian 

 National Collection and the Boston Society of Natural History. 



24. EXETASTES INFUMATRICUS, new species 



Very closely related to matricus, from wliich it appears to differ 

 only as follows: 



Female. — Malar space only two-thirds as long as basal width of 

 mandible; eyes slightly longer; scutellar carinae confined to base; 

 front tibia and tarsus largely, front femur anteriorly, and middle 

 femur apically ferruginous; hind femur not at all black; joints 3 and 

 4 and apex of joint 2 of hind tarsus yellow; wings deeply infumate. 



Type locality. — Rochester, Wash. 



r?/p6.— U.S.N. M. no. 51810. 



Paratype. — Cornell University. 



Remarks.— The type captured July 22, 1931, by H. T. Peters; the 

 paratype in Washington, July 25, 1893, by T. Kincaid. 



25. EXETASTES ABDOMINALIS Cresson 



Plate 17, Figure 21 



Exetastes abdominalis Cresson, Proc. Ent. Soc. Philadelphia, vol. 4, p. 276, 1865; 

 female. 



Similar in the high hypostomal carina to matricus and infumatricus , 

 but in this species the carina is only about half as high as in the others, 

 and the hind femur is black to piceous. Differs further from the 

 above description of matricus as follows: 



Female. — Temples hardly two-thirds as long as short diameter of 

 eyes; hypostomal carina hardly half as high and not arched; antenna 

 (one specimen) with 49 joints; propodeum finely mat and sparsely 

 punctate above, densely punctate laterally, apical areas finely rugu- 

 lose; pleural carinae indicated by fine foveolate grooves. 



Head and thorax blue-black, hind femur piceous to black; joints 

 3 and 4 of hind tarsus, and sometimes apex of 2, yellow. 



Type locality. — Colorado. 



Type.—kciid. Nat. Sci. Philadelpliia no. 1612. 



Remarks. — In addition to the type I have seen only two specimens, 

 both in the United States National Museum, from the C. F. Baker 

 Colorado collection, one compared with the type by myself. 



