48 GENERA OF HYMENOPTERA. 



10. — Teetli "f niHndihles iine<)nal ; first aMominal segment somewhat constricted 

 in front of the spinicles which are phiced a little before the middle; 



areolet almost always present ^l*erilii4MUM Forst. 



Teeth of mandibles eijiial ; heail spherical ; antennte and femom very 

 slender; first abdominal segment slender, its spiracles i)laced in the 



middle; areolet wantinf; Kt^lytllM HolniKr. 



11. — Tarsiil claws stout, with long and closely set teeth ; head scarcely etevat«'d 

 or swollen ; first abdominal segment elevated, generally with a dis- 

 tinct median furrow C'teiiopelliiH Holnigr. 



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

 peus scarcely separated ; first abdominal segment depressed, with a 



feeble, or without, median furrow ^Prioiiopodn llolmgr. 



12. — Tarsal claws not pectinate 13. 



Tarsal claws more or less distinctly pectinate 16. 



13. —Clypeus not or scarcely protuberant 14. 



ClyiHjus strongly elevated; antennie short; metathorax imperfectly areo- 

 lated ; first abdominal segment not furrowed above ; areolet when 

 present usually pentangular; legs slender, posterior femora thickened, 



narrowed at base €irypoceiitrUN Ruthe. 



14.— Labrnm scarcely exserted 15. 



I.«brum much exserted ; antennse shorter than the body ; areolet when 

 present subpentangular ; stigma tolerably large ; posterior tibise robust, 



with short apical .spurs -' A«lelogiiathuf>i Holmgr. 



1,5.— Areolet usually wanting. 



Head not dilated behind the eyes; metathorax imperfectly or obsolotely 

 areolated; first segment of the subsessilc abdomen not or indistinctly 

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

 femora elongate, scarcely robust ; ovipositor .straight. 



9IeNolt'ius Holmgr. 

 Head dilated behind liie eyes ; metathorax distinctly areolated ; first .seg- 

 ment of the subsessilc abdomen with tolerably distinct groove; legs 



moderate ; ovipositor somewhat bent ^TrematopygiiM Holmgr. 



Areolet usually jiresent ; dypeus .somewhat elevated medially; metathorax 

 distinctly areolated ; finst segment of the sessile abdomen not or but 

 slightly narrowed to base, distinctly furrowed and carinate; areolet 

 when present small, usually irregularly oblique and jtctiolate; legs 

 thickened, posterior femora short, robust; ovipositor straight. 



Tr,rplioii Grav. 



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



.segment subquadrate, the following .segments short, transvei-se ; cheeks 



swollen, a broad space between the eyes and base of mandibles ; areolet 



wanting; ovijjositor not exserted Eucerow Grav. 



Antennie filiform in both sexes. 

 Abdominal segments 2-4 constricted at base above, the apical margins 

 prominent, first segment quadi-ate and but slightly narrowed at biise; 

 legs short and rather slender, posterior tarsi shorter than their tibiae; 

 antennie shorter than the body ; areolet trianguliir, subpctiolate ; ovi- 

 positor very .short CatoceutruiJi Walsh. 



Abdominal segments not constricted. 



Legs moderately long and slender Pol.yblaMtuM Hartig. 



Legs short, thickened, with robust femorsi ErroiueiiUM Holmgr. 



