4ET. 15. REVISION OF ICHNEUMOX-FLIES MUESEBECK. 45 



Stigiua iinicoloious, very rarely with the costal thickening at base uf 

 stigma pale; dorsum of abdomen never testaceous 12. 



11. Abdomen broad and stout; the venter and most of the dorsum beyond 



second tergite testaceous; tegulae yellow. 



9. quadridentatus (Provaneher). 

 Abdomen more slender, wholly black; tegulae usually black. 



10. alaskensis Ashmead. 



12. Tegulae black ; all coxae and basal segment of trochanters black ; fore wing 



with a distinct slightly fuliginous patch extending across the first cubital 



and first discoidal cells 11. autographae, new species. 



Tegulae yellow 13. 



13. Fore and middle coxae yellowish ; scape testaceous below ; parapsidaJ 



grooves deep and coarsely roughened 12. hyphantriae Ashmead. 



All coxae dark brown or black; scape wholly black; parapsidal grooves 

 usually not so deep and coarsely roughened 13. ceratomiae Riley. 



14. Posterior femora short and stout, not more than three times as long as 



their greatest breadth ; vertex, temples, cheeks and mesoscutum smooth 

 and subpolished, with only indistinct, exceedingly minute punctures; 

 temples bulging slightly beyond the line of the eyes; tegulae and all 

 coxae black ; remainder of legs bright testaceous ; first dorsal abdominal 

 plate twice as long as broad, base and apex of equal breadth, mostly 



smooth and polished : length more than 3.5 mm 15. 



Posterior femora not so stout; otherwise not combining all the above 

 characters 16. 



15. Wings strongly infumated 14. croceipes (Cresson), 



Wings hyaline 15. longicaudus, new species, 



16. First dorsal abdominal plate mostly smooth and polished ; dorsum of 



abdomen always black ; mesoscutum never with distinct parapsidal 



grooves IT 



First dorsal abdominal plate largely rugulose, rarely mostly smooth, and 

 then the abdomen is more or less testaceous above, or the parapsidal 

 grooves are distinctly impressed 24. 



17. Mesoscutum and scutellum only weakly indistinctly punctate and usually 



very strongly shining; first dorsal abdominal plate about as broad at 



apex as at base 18. 



Mesoscutum and scutellum sharply, often confiuently, punctate and opaque; 

 first dorsal abdominal plate distinctly narrower at apex than at base-- 19. 



18. Scutellum very small, flat, almost polished ; legs, except coxae, mostly 



testaceous; basal segment of autennal flagellum in female, distinctly 



longer than the second ; length not over 2.5 mm 16. gortynae Riley. 



Scutellum large, convex ; middle and posterior femora black ; basal segment 

 of antennal flagellum not distinctly longer than the second; length, 

 3.5 mm 17. nigritus, new species. 



19. Wings clear hyaline or whitish-hyaline; stigma with a large pale spot in 



the membrane at base; posterior femora mostly testaceous 20. 



Wings either slightly fuliginous or hyaline, but if hyaline, posterior femora 

 are black; stigma nearly always unicolorous 21. 



20. Stigma decidedly more than twice as long as its greatest breadth ; tegulae 



black; face, vertex, temples and cheeks coarsely punctate and opnque. 



18. melianae Viereck. 



Stigma not more than twice as long as its greatest breadth ; tegulae usually 



yellow; face, vertex, temples and cheeks much more weakly punctate 



and shining 19. brassicae, new species. 



