48 GENERA OF HYMENOPTERA. 



10. — Teetli of niiuKlil)k>s unequal ; first iilxlouiinal seftuient somewhat constricted 

 iu front of the spiracles which are jilaced a little Ijefore the middle; 



arcolet almost always present ■ Porilissiis Forst. 



Teeth of mandihles ecjual ; head spherical; antenna and femora very 

 slender; first ahdominal segment slender, its si)iraclcs placed in the 



middle; areolet wanting KclytiiK Ilolmgr. 



11. — Tarsiil claws stout, with long and clo.sely set teeth; head scarcely elevated 

 or swollen ; first ahdominal segmcmt elevat(>d, generally with a dis- 

 tinct median furrow C'teiiopeliiia llolmgr. 



Tarsal claws with short separated teeth ; head elevated or swollen, its cly- 

 peus scarcely separated ; first abdominal segment dciircsscd, with a 



feeble, or without, median furrow *l*ri<>iioi»oda llo'.niu'r. 



12. — Tarsal claws not pectinate 13. 



Tarsal daws more or less distinctly i)ectinate IH. 



13.— Clypeus not or scarcely jJroUiberant 14. 



Clypeus strongly elevated ; antennas sliort ; metathorax imperfectly areo- 

 lated ; first abilominal segment not furrowed above ; areolet when 

 present usually pentangular; legs slender, jjosterior femora thickened, 



narrowed at base <iirji>oc*eiitrii!>» Ruthe. 



14.— Lahrum .scarcely ex.serted 15. 



Labrum much exserted; antenna' .shorter than the body; areolet wlien 

 present subpentangular ; stigma tolerably large ; posterior tibije robu.st, 



with short apictil spurs -' A(loIo^iiatliii<>> Holmgr. 



l.">. — Areolet usually wanting. 



Head not dilated behind the eyes; metathorax imperfectly or obsoletely 

 areolated ; firet segment of the subsessile abdomen not or indistinctly 

 grooved above, gradually narrowed to base ; legs slender, posterior 

 femora elongate, scarcely robust ; ovipositor .straight. 



9IeM<>loiiis llolmgr. 

 Head dilated behind the eyes ; metathorax distinctly areolated ; first seg- 

 ment of the subsessile abdometi witii toleraldy distinct groove; legs 



moderate; ovipositor .somewhat bent Tr<>iiial<»i»y$>;ii!<i Holmgr. 



Areolet usually i>reseut; clypeus .somewhat elevated medially; metathorax 

 distinctly areolated; fir.st segment of the sessile abdomen not or but 

 slightly narrowed to base, distinctly furrowed and carinate ; areolet 

 when present small, usually irregularly oblique and petiolate; legs 

 thickened, posterior femora short, robust; ovipositor straight. 



Tr.y|»li4»ii Grav. 



16. — Antenna? of % dilated and flattened in the middle ; abdomen sessile, first 



segment subquadrate, the following .segments short, transverse ; cheeks 



svi^oUen, a broad space between the eyes and base of mandibles ; areolet 



wanting; oviy>ositor not exserted Kiiooros (Irav. 



Antennic filiform in both .sexes. 



Abdominal segments 2-A constricted at base al)Ove, the ajiical margins 

 prominent, first segment quadrate and but slightly narrowed at ha.se; 

 legs short and rather slender, jwsterior tarsi shorter than their tibise; 

 antennie shorter than the body; areolet triangular, snb]ictiolate ; ovi- 

 positor very short I'ai4»<'eiilrii*« Walsh. 



Abdominal segments not constricted. 



Legs moderately long and slender I'ol,^ l>Ia*<>tiis llartig. 



Legs short, thickened, with robust femora KriMtiiieiiiiM Holmgr. 



