192 U. S. NATIONAL MUSEUM BULLETIN 216 



brown, and last two segments of hind tarsus light brown with their 

 base paler. The interantennal process may be light brownish to 

 blackish. Sometimes the coxae and trochanters are fulvous or fulvous 

 brown rather than blackish. 



Type: d", Mer Bleue (near Ottawa), Ont., Aug. 9, 1932, G. S. 

 Walley (Ottawa). 



Paratypes: 2cf, Vermilion Lake, Banff, at 4,500 ft., Alta., Aug. 17 

 and 20, 1925, Owen Bryant (Washington), tf 1 , Baddeck, N. S., 

 July 24, 1936, J. McDunnough (Ottawa). 12c?, 79, Mer Bleue (near 

 Ottawa), Ont., June 8, 1933, and Aug. 9, 1932, G. S. Walley (Ottawa). 



This species appears to be transcontinental in the Canadian zone. 



8. Exochus semirufus Gresson 



Figure 191,h 



Exochus semirufus Cresson, 1868, Trans. Amer. Ent. Soc, vol. 2, p. 114; c?, 9- 



Lectotype: 9, New York (Philadelphia). 

 Exochus inflatifrons Provancher, 1886, Additions et corrections au volume n 



de la faune entomologique du Canada traitent des hymenopteres, p. 107; 



9. Type: 9 , Ottawa, Ont. (Quebec). 

 Exochus rufigasler Ashmead, 1890, Proc. U. S. Nat. Mus., vol. 12, p. 443; 9 . 



Type: 9 , Texas (Washington). 

 Exochus solitarius Davis, 1897, Trans. Amer. Ent. Soc, vol. 24, p. 216; o*. Type: 



cf, Canada (Philadelphia); the "type" is a composite specimen, with the 



abdomen of the present species and the rest of the specimen of some other 



species. 



Front wing 4.2 to 6.5 mm. long; flagellum with about 37 segments, 

 the median segments of male flagellum about 1.15 as long as wide, of 

 female flagellum about 1.1 as long as wide; metapleurum with scat- 

 tered hairs covering about 80 per cent of its surface in the male, cover- 

 ing about 65 per cent of its surface in the female; second lateral area 

 of propodeum with hairs in its apicolateral 0.35. 



Black. Interantennal process, usually a small spot at top of eye, 

 maxilla, and labium, stramineous to medium brown; mandible of male 

 yellowish fulvous, black basally; tegula fulvous, j^ellow on basal 0.35; 

 legs fulvous, the tarsi, especially the hind tarsus, more or less infuscate 

 with basal part of the basitarsi paler; abdomen fulvoferruginous, 

 usually blackish at base and apex. One specimen at hand ( cf , Greys 

 Mills, N. B., Sept. 8, 1922, R. P. Gorham (Ottawa)) has the coxae and 

 first trochanters blackish rather than fulvous. Otherwise it seems 

 typical of the present species. Another specimen with the same col- 

 lection data and of the same sex is normally colored, with the coxae 

 and trochanters fulvous. 



Specimens (67 d 1 , 259): From Iowa (Mount Pleasant); Kansas 

 (Riley Co.); Maine (Little Deer Island); Maryland; Massachusetts 

 (Amherst, "Clayton," Dorchester, Tyngsboro, and Wellesly); Mis- 

 souri (Columbia); New Brunswick (Grey's Mills and Waweig); New 



