22 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiii. 



Tip of abdomen very obtuse, the ovipositor curving upward. 



(74) Ileterisclumn Wesniael. 

 (Type, Ichneumon pulex Miiller.) 



2. Superior liind angles of metathorax normal, not toothed 3 



Superior hind angles of metathorax prominently toothed; clypeus subquadrate. 



(75) Apxhiicus Wesmael. 

 (Type, Apceleticuft bclUcosns Wesmael. ) 

 :!. Spiracles of first alxloiniiial segment placed at the middle. 



(76) Dlarritiis F(")rster. 

 Spiracles of first al)dominal segment placed behind the middle. 



Metathorax not produced at apex beyond the base of hind coxaj 4 



Metathorax much lengthened and at apex produced beyond the base of the 

 hind coxae. 

 Clypeus convex, not separated from the face at base; abdomen not 



compressed at the apex (77) Oronolus Wesmael. 



(Type, Oronotns coarctaius Wesmael.) 

 Clypeus depressed, separated from the face by a deep furrow; abdomen 



compressed at apex (78) Diaschisafipis Forster. 



(Type, Diaschisaspis campoplegoidcs Holmgren.) 

 4. Second alxlominal segment with the lunulse small, never twice as long as broad; 



metanotum not sloping gradually from base to apex 5 



Second alxlominal segment with the lunula very large, linear, twice as long as 

 broad; metanotum gradually sloping from base to apex; areolet 



open or closed (79) Hemichneumon Wesmael. 



(Type, Hemichneumon suspectus Wesmael. ) 



r-). Areolet o]ien ]>ehind; marginal cell along the costa scarcely longer than the 



triangular stigma; transverse median nervure in hind wings straight, 



not broken (80) Epitomus Forster. 



(Type, Epitomus parvus Thomson. ) 

 Areolet closed. 



Clypeus unarmed, uithont a tooth at apex 6 



Clypeus villi a tooth at apex. Upper tooth of the mandibles longer than the 

 lower; transverse median nervure in hind wings broken below the 



middle (81 ) Misctus Wesmael. 



(Type, Misetus oculatus Wesmael. ) 



6. Clypeus at apex ici^/i a median semicircular emargination; mandibles with the 



teeth very unequal (82) Olorldnus Wesmael. 



(Type, Olorhinus pallipalpis Wesmael. ) 

 Clypeus at apex without such an emargination. 



Clypeus at apex medially vithout a fovea 7 



Clypeus at ajjcx medially ^vith a deep depression or fovea which often appears 

 laterally as two small, blunt teeth; abdomen shagreened or densely 

 coriaceous and finely punctate; mandibles rather large, the teeth 

 subequal; transverse median nervure in hind wings broken very 



little below the middle (83) ^Ethecerus Wesmael. 



(Type, JEthecerus dispar Wesmael. ) 



7. Discoidal transverse nervure wanting (84) Tijchcrus Forster. 



Discoidal transverse nervure present. 



Second abdominal segment luithout distinct gastrocoeli at base 8 



Second abdominal segment with distinct gastrocoeli at base. 



Metathorax at apex not produced beyond insertion of hind coxge. 



Scape of antennse only slightly emarginate, longer than the first 



joint of flagellum (85) Ilerpestomns Wesmael. 



[Type, Ichneumon brunnicornis Gravenhorst. ) 



i 



