NO. 1206. ICHNEUMON FLIES— ASHMEAD. 65 



to the pleural area; first abdominal segment with deep lateral fovese 

 at base 5 



Stigma narrow; first joint of the flagellum distinctly longer than the second; 

 metathoracic sjiiracles linear and lying nearer the external area 

 than to the pleural area; first alxlominal segment usually without 



deep lateral fovea" at base ('^22) Sychnoleter Forster. 



5. Transverse median nervure in hind wings broken below the middle. 



(423) Laphyroscopus Forster. 

 Transverse median nervure in hind wings broken at or above the middle. 



(424) Perilissvs Forster. 



(). Flagellum 85-40-jointed, usually somewhat thickened; abdomen in female with 



the last segment so emarginate that the ovipositor lies immediately 



upon the back 7 



Flagellum not especially thick; abdomen in female with last segment normal or 

 not emarginate 8 



7. Metanotum at base exareolated; hypopygium in female very [)ruminent. 



(425) Polycineth Forster. 

 Metanotum at base areolated. 



Front wings xvithout an areolet (426) Ilomaspis Forster. 



Front wings vnth an areolet. 



Second abdominal segment with two middle carina at base. 



(427) N(Aopycjus Holmgren. 

 Second abdominal segment without middle carinre. 



(428) Prosmorus Forster. 



8. Hind femora normal 9 



Hind femora thickened. 



Ovipositor outwardly serrate (429) Catoylyptus Forster. 



9. Cheeks entirely smooth, shining, neither coriaceous nor punctate 10 



Cheeks not entirely smooth, shining, either alutaceous, coriaceous, or punc- 

 tate 11 



10. Front wings u'it]i an areolet (430 ) Gavsocentrus Forster. 



Front wings witJiont an areolet. 



Occipital margin interrupted at the middle (-lol) Latldponus Forster. 



Occipital margin entire (-132) Phobete>i Forster. 



11. Clypeus distinctly separated 12 



Clypeus vot separated. 



Eyes small, flat, not arched above the level of the head. 



(433) Ilorimlomuia Forster. 

 Eyes large, arched above level of the head (•434) Hypocryptus Forster. 



12. Face strongly narrowed toward the mouth (435) Rhsestes Forster. 



Face not strongly narrowed. 



Abdominal segments 2-4 not twice as wide as long 13 



Abdominal segments 2-4 twice as wide as long.. (436) Sliphrosomusi Forster. 



13. First abdominal segment with lateral carinte that extend from the spiracles to 



the tip 14 



First abdominal segment ivithout such carinte 21 



14. Front wings u-ith an areolet 16 



Front wings without an areolet. 



Last joint of hind tarsi 7iot so long as the third and also not pectinate 15 



La.st joint of hind tarsi fully as long as the third and also pectinate. 



(437) Dizemon Forster. 



15. Radius originating somewhat beyond the middle of the stigma; metathorax 



completely areolated; abdomen entirely smooth; sheath of ovi- 

 positor very broad (438) Cullidiotes Forster. 



Proc. N. M. vol. xxiii 5 



