ICHNEUMON-FLIES, PART 2: EPHIALTINAE 397 



3. Second through fourth sterna of male a single, convex, undivided sclerite; sec- 



ond through fourth sterna of female with an apical membranous area extend- 

 ing forward between the paired sternites for about 0.25 their length; face 

 more sparsely hairy medially than laterally; apical margin of male subgenital 

 plate broadly concave; flagellum without a white band; temporal orbit 

 partly or entirely white. Persuasoria group . 7. persuasoria (Linnaeus) 

 Second through fourth sterna of male each with 3 longitudinal sclerites (a 

 broader median sclerite, a pair of narrower lateral sclerites) ; second through 

 fourth sterna of female with an apical membranous area extending forward 

 between the paired sternites for about 0.35 the length of the sternites; face 

 more densely hairy medially than laterally; apical margin of male subgenital 

 plate convex, subtruncate, or with a broad weak median notch; flagellum 

 with or without a white band; temporal orbit black or partly or entirely 

 white. Amobna group 4 



4. Flagellum entirely black; range: western North America 5 



Flagellum with a white band except in occasional small males (with front 



wing less than 8.5 mm. long) 6 



5. Temple with a sharp narrow white stripe next to eye (fig. 317, c); face of male 



black medially, white next to eyes; apex of male subgenital plate with a 



broad median notch 3. ponderosae, new species 



Temple entirely black or blackish brown, or rarely with a poorly defined 

 whitish blotch; face of male entirely white; apex of male subgenital plate 

 truncate 4. alaskensis Ashmead 



6. Hind coxa without a white mark dorsobasally, or sometimes with a small 



white mark restricted to its constricted base; white mark on metapleurum 

 prolonged forward along upper margin of metapleurum (fig. 317, e), thus 

 having a subtriangular shape (this mark absent or very much reduced in 

 some males); paramedial white spots of female fourth and fifth tergites 



about 2.0 as wide as high 5. crevieri (Provancher) 



Hind coxa with a white mark dorsobasally, usually in the form of a small 

 dash but in larger females often enlarged and irregular in shape or covering 

 the entire upper face of the coxa; white mark on metapleurum constricted 

 next to upper margin of metapleurum (fig. 317, f), thus having a somewhat 

 rounded shape (this mark absent or very much reduced in some males) ; 

 paramedial spots of female fourth and fifth tergites about 1.5 as wide as high. 



6. lineolata (Kirby) 



I. HOFERI GROUP 



Face with sparse hairs all over except along the midline, where 

 they are very sparse or absent; lateral portion of prepectal carina short, 

 weak; first tergite 1.2 to 2.0 as long as wide; second through sixth 

 tergites mat, with dense, fine, weak punctures; third tergite of both 

 sexes with dense short hairs the sockets of which are separated by 

 about length of the hairs; second through fourth sterna of male each 

 with three longitudinal sternites (a wide median sternite and a pair 

 of narrow lateral sternites) ; apical membranous area of female second 

 through fourth sterna not appreciably extended forward medially 

 between the paired sternites; apical margin of male subgenital plate 

 weakly sinuous. 



