ICHNEUMON-FLIES, PART 2 1 EPHIALTINAE 373 



at altitudes of 4,700 and 5,300 ft., one from Saskatoon, Saskatchewan, 

 and one from Pipestone Pass, Montana, seem definitely to be novita. 

 They possess all the whitish areas mentioned above except that on the 

 hind basi tarsus. 



Distribution: Canada: British Columbia, Ontario, Quebec, Sas- 

 katchewan; United States: California, Connecticut, Maine, Maryland, 

 Massachusetts, Michigan, Minnesota, New Hampshire, New York, 

 Virginia, Washington, West Virginia, Wisconsin. 



Hosts: Sawfly larva in elder stem (collected by J. C. Bridwell in 

 Vienna, Virginia) ; Mononychus vulpeculus (Fabricius) ; Acrobasis 

 rubrifasciella Packard (=Phycis rubrifasciella (Packard)) (parasites 

 reared by Dimmock and identified by Ashmead) ; Exartema olivaceanum 

 Riley; Eublemma minima (Guenee) (= Thalpochares carmelita Mor- 

 rison). The last two records are doubtful, as the collector and 

 identifier are not given. Host records are so meager for this species 

 that I make no effort to evaluate them further. 



3. Genus Pseudorhyssa 



Figure 300,b 



Pseudorhyssa Merrill, 1915, Ann. Ent. Soc. America, vol. 41, p. 150. Type: 

 Pseudorhyssa sternata Merrill = ruficoxis (Kriechbaumer) ; original desig- 

 nation. 



Front wing 7 to 19 mm. long; body form elongate; apex of clypeus 

 with a strong median point; propodeal carinae weak; tarsal claws 

 simple, of moderate size, without an enlarged bristle with a spatulate 

 tip; nervellus broken far above the middle; abdomen strongly mat, 

 its hairs rather dense; ovipositor strongly compressed, slender, its 

 apex not sinuate, its sheath about 1.9 as long as front wing. 



This genus contains the European Pseudorhyssa alpestris (Holm- 

 gren), 1859, and the Holarctic species described below. 



1. Pseudorhyssa ruficoxis (Kriechbaumer), new combination 



"Rhyssa approximator (Fabricius)" of authors, not of Fabricius. 



Rhyssa approximator var. ruficoxis Kriechbaumer, 1887, Ent. Nachr., vol. 13, 



p. 250; 9 . Type: 9 , between Beuerberg and St. Heinrich, Starnbergersee, 



Germany (Munich). 

 Pseudorhyssa sternata Merrill, 1915, Trans. Amer. Ent. Soc, vol. 41, p. 150; 9 • 



New synonymy. Type: 9 , Toronto, Ont. (Philadelphia). 



Front wing 7 to 12.5 mm. long in male, 10 to 19 mm. long in female; 

 first tergite about 1.95 as long as wide, its dorsal longitudinal carinae 

 sharp on its basal 0.4 ±, continuing as blunt ridges to near its apical 

 0.7 ± ; ovipositor sheath about 1.9 as long as front wing. 



Male: Black. Face, under side of face and pedicel, obscure blotch 

 on base of mandible, palpi, hind corner of pronotum, tegula, front 



