ICHNEUMON-FLIES, PART 2\ EPHIALTINAE 9 



Nervellus broken above the middle (except in some extra-limital species of 

 Zaglyptus) ; ovipositor of uniform diameter, straight (fig. 290) ; female 

 subgenital plate not enlarged nor projecting 5 



5. Areolet usually present; propodeum without a distinct lateral subapical 



tubercle (fig. 290, a) ; basal tooth of ovipositor not enlarged] or free at the 

 tip (fig. 331, c); ventral valve of ovipositor with a finely wrinkled surface. 



10. Tromatobia (p. 174) 



Areolet always absent; propodeum with a lateral subapical tubercle, the 



tubercle strong in the female (fig. 290,b), weak in the male; basal tooth of 



ovipositor large and with a long free tip (fig. 331,d); ventral valve of 



ovipositor with a smooth surface 11. Zaglyptus (p. 188) 



6. Mesoscutum, or at least its lateral lobes, almost or quite bare of hairs; median 



dorsal carina of first tergite ascending from its beginning point at the 

 basolateral corner of the tergite at 70° to 90° from the horizontal, then 

 curved backward (fig. 286,b), in male extending some distance horizontally, 

 in female short and ending abruptly; ovipositor not distinctly compressed. 



3. Calliephialtes (p. 80) 

 Mesoscutum with dense or moderately dense hairs all over except (in the 

 Nearctic fauna) in Anastelgis (Californian) and in a few species of Scambus 

 from the western and southwestern parts of the Nearctic region; median 

 dorsal carinae of first tergite, when present, ascending at 20° to 65° from 

 the horizontal and apically extended horizontally in both sexes (figs. 285- 

 286,a; 287-289) 7 



7. Nervellus broken at or below the middle (figs. 285, b; 286, a; 289,a); ovipositor 



more or less compressed 8 



Nervellus broken near or above the middle (figs. 285a; 287; 288); ovipositor 

 compressed or cylindric 9 



8. Second tergite with distinct oblique grooves cutting off its basolateral corners 



(fig. 289, a) ; clypeus of male white (or yellow in some exotic species) ; 

 areolet receiving second recurrent vein usually at its outer corner (fig. 

 289,a), rarely the areolet absent; tip of dorsal valve of ovipositor, in profile, 

 a little concave beyond the nodus; ridge of basal tooth of lower valve of 

 ovipositor at about 15° from the horizontal . ... 8. Acropimpla (p. 159) 

 Second tergite without oblique grooves cutting off its basolateral corners 

 (fig. 286, a) ; clypeus of male black, blackish, or dark ferruginous; areolet 

 always receiving second recurrent vein distinctly basad of its outer corner 

 (fig. 286, a) ; tip of dorsal valve of ovipositor, in profile, convex or straight 

 beyond the nodus, or occasionally a little concave; ridge of basal tooth of 

 lower valve of ovipositor. ; 20 o to90°fromtheliorizontal. .2. Scambus (p. 15) 



9. Basal half or more of clypeus rather strongly convex; clypeus of male white 



or pale yellow; ovipositor somewhat compressed, its sheath about 0.3 to 0.7 

 as long as front wing, the ridges of the basal teeth on its lower valve about 

 30° from the horizontal; hind tibia usually with conspicuous black and 



white banding 9. Iseropus (p. 165) 



Basal half of clypeus nearly flat; clypeus of male not white nor pale yellow 

 except in Pimpla, black, blackish, ferruginous, or concolorous with the 

 head; ovipositor subcylindric, its sheath about as long as or longer than 

 front wing, the ridges of basal teeth of its lower valve mostly 40° to 90° 

 from the horizontal; hind tibia without conspicuous black and white 

 banding 10 



526527—60- 



