ICHNEUMON-FLIES, PART 2\ EPHIALTINAE 89 



3. Palpi and most of tegula brown; tip of ovipositor rather blunt (fig. 329, g). 



4. arcticus (Roman) 

 Palpi and tegula white; tip of ovipositor more acute 4 



4. Scutellum partly or entirely fulvous; most of punctures on propodeum sepa- 



rated by their diameter or less 5 



Scutellum entirely black; punctures on propodeum sometimes separated by 

 more than their diameter 6 



5. Middle coxa fulvous; tip of ovipositor not unusually slender (fig. 329,f). 



2. variatipes (Provancher) 



Middle coxa white, tinged with fulvous basally; tip of ovipositor exceptionally 



slender 6. petulcus (Cresson) 



6. Trochanters of front leg and second trochanter of hind leg not whitish, fulvous 



like their femora; punctures on central part of propodeum separated by less 



than tbeir diameter 3. masoni, new species 



Trochanters of front leg and second trochanter of hind leg whitish, much paler 

 than their fulvous femora; punctures on central part of propodeum sepa- 

 rated by more than their diameter 7 



7. White on upper margin of pronotum extending from hind corner about two- 



thirds the distance to notaulus; front coxa fulvous, its apex more or less 

 whitish; upper edge of hind tibia whitish, with a brown band apically and 



subbasally 5. nucicola (Cushman) 



White on upper margin of pronotum extending from the hind corner to in 

 front of notaulus; front coxa mostly white; upper edge of hind tibia light 

 brown, darker apically and subbasally 8. coracinus, new species 



1. Apistephialtes tenuiventris (Holmgren), new combination 



Figures 329,e; 330,j; 334 



Ephialtes tenuiventris Holmgren, 1860, Svenska Vetensk. -Akad. Handl., ser. 4, 

 vol. 3, No. 10, p. 14; cT, 9- Types: o", 9, Sweden (Stockholm). 



Ephialtes pacificus Harrington, 1894, Canadian Ent., vol. 26, p. 248; cf , 9 • 

 Types: d\ 9 , Victoria, B. C. (Ottawa). 



Ephialtes pusio Walsh, 1873, Trans. Acad. Sci. St. Louis, vol. 3, p. Ill; 9 • New 

 synonymy. Type: 9 , ? Illinois (destroyed in Chicago fire of 1871). 



Front wing of male 7.0 to 8.0 mm. long, of female 9.7 to 12 mm. 

 long; propodeum a little rugulose near its midline and with indistinct 

 parallel longitudinal ridges at position of the median longitudinal 

 carinae, its punctures separated by about 0.6 their diameter; first 

 tergite of male about 2.4 as long as wide; male subgenital plate and 

 the preceding sternite as in figure 330,j ; male eighth and ninth tergites 

 not fused; male clasper moderately elongate (fig. 334); ovipositor 

 sheath about 2.5 as long as front wing; tip of ovipositor as in figure 

 329,e. 



There are some additional structural characters by which this 

 species differs from all the others in its genus, and which might be 

 sufficient basis for placing it in a separate genus. These are as follows : 

 hair on face of male very dense (moderately dense in the other species 

 of the genus); hairs on combined costa and subcosta of male long, 

 erect, with curled-over tips (moderately short and inclined in the other 

 species of the genus); nervellus usually in front of basal vein by about 



526527—60 7 



