36 U. S. NATIONAL MUSEUM BULLETIN 216 



(Townes). <?, Shokan, N. Y., July 11, 1936, H. K. Townes (Townes). 

 cf , Summit Co., Ohio, Sept. 1, 1937, Louis J. Lipovsky (Lawrence). 

 9, Galetta, Ont., July 22, 1942, G. S. Walley (Ottawa). 29, Tweed, 

 Ont., July 15 to 17, 1944, G. S. Walley (Ottawa). 2 cf, 49, Cap Rouge, 

 Que., July 8, 1953, R. Lambert (Ottawa), d\ Hull, Que., June 20, 

 1903 (Ottawa). 29, Knowlton, Que., July 20, 1936, G. S. Walley 

 (Ottawa). 9, Montreal, Que., May 25, 1902 (Ithaca), cf, Westerly, 

 R. I., June 16, 1936, M. Chapman (Townes). 9, Waskesiu, Sask., 

 June 24, 1938, J. G. Rempel (Townes). 9, Wellsville, Utah, May 7, 

 1954, G. E. Bohart (Lawrence). 9, Adna, Wash.. July 10, 1917, A. L. 

 Melander (Cambridge). 9, Ashford, Wash., July 10, 1940, H. and M. 

 Townes (Townes). 9, Copalis, Wash., July 25, 1931, J. Nottingham 

 (Lawrence), cf, 9, Mount Rainier at 2,700 ft., Wash., July 8, 1940, 

 H. and M. Townes (Townes). 29, Sawyer Co., Wis., Aug. 1 to 8, 1937, 

 D. Murray (St. Paul). 

 Host: Unknown. 



Subgenus Scambus 



Figure 286,a 



Scambus Hartig, 1838, Jahresber. Fortschr. Forstw., vol. 1, p. 267. Type: 



Pimpla (Scambus) sagax Hartig; designated by Viereck, 1914. 

 Tromera Foerster, 1868, Verh. Naturh. Ver. Rheinlande, vol. 25, p. 164. Type: 



Pimpla pomorum Ratzeburg; included by Schmiedeknecht, 1888. 

 Epiurus Foerster, 1868, Verh. Naturh. Ver. Rheinlande, vol. 25, p. 164. Name 



preoccupied. Type: Pimpla brevicornis Gravenhorst; designated by Ash- 



mead, 1900. 

 Troctocerus Woldstedt, 1876, Bull. Acad. Imp. Sci. St. Petersbourg, vol. 22, p. 296. 



Type: Troctocerus elegans Woldstedt; monobasic. 



Submetapleural carina present; thorax and propodeum usually 

 rather short, occasionally (ephialtoides group) moderately long and 

 subcylindrical ; propodeum usually with more or less distinct, rather 

 short, dorsomedial carinae; abdominal sternites in female varying from 

 rather small to moderately large and with the basal pair usually 

 larger than the others; subgenital plate in female with a large, basal, 

 membranous excision; sheath varying from about 0.75 to 1.5 times as 

 long as abdomen, or in imparls about 0.4 as long as abdomen; ovi- 

 positor moderately to weakly compressed, with basalmost ridges on 

 apex of lower valve rather strongly (except in S. protentus) oblique, 

 forming an angle of about 30° with its longitudinal axis, and devel- 

 oped dorsally into forward directed teeth; apical segment of tarsus 

 rather short (in female about equal to combined length of two pre- 

 ceding segments) ; front femur of male occasionally simple, but more 

 often with a single or a double excision beneath; thorax black in 

 Nearctic species. 



