84 GENERA OF HYMENOPTERA, 



8.— Face with a sharp spur *$)parasion Latr. 



Face without a spur 9. 



9.— Postmarginal vein strongly lengthened, longer than stignml 10. 



Postmarginal vein wanting, or shorter than stigmal 11. 



10.— Postscutelhini with a spnr ^Trimorus Forst. 



Postscutelluni without a spur. 



Antennee J filiform *Apegus Forst 



Antennte 9 club-shaped, or % filiform. 



Marginal vein punctiform ; last joint of antennal club twice as long as 



the preceding joint *Cilryoii Hal. 



Marginal vein half as long as the shaft of the stigmal : last joint of an- 

 tennal club scarcely longer than the preceding. 



Hadroiiotns Forst. 



11. — Postmarginal vein wanting Scelio I..atr. 



Po.stmarginal vein present, but ninch shorter than stigmal. ...'^Idris For.st. 



Subfamily Platygasterix.t:. 



Suhmarginal vein with a knob al tip 2. 



Submarginal vein without a knob at tip 7. 



2.— Tarsi 4-jointed ^Iphetrachelus Hal. 



Tarsi .5-jointed .'}. 



3. — Antennre 9-joiutod, dentate in % *Allotropa B^oi-st. 



Antennte 10-jointed, not dentate in % ...4. 



4.— Wings with a basal and a median vein 5. 



Wings without basal and median veins 6. 



5. — I^st three funicle joints much larger than the rest, forming a club. ' 



*.Tfela<*Iisis Forst. 



Last funicle joint alone longer than the preceding ^IVIonocrita Fiirst. 



fi. — Basal ocelli nearer the apical than to the inner margin of the eye. 



Isostasins Foi-st. 

 6a.sal ocelli nearer the inner margin of the eye than to the apical ocellus. 



First abdominal .segment 9 with a horn Iiiosteinn&a Hal. 



First abdominal segment 9 without a horn *Acerota F.irst. 



7. — Scutellum more or le.ss lengthened, never sei.iicircular, or when shortened 

 it is compres.sed at the sides and furnished with an awl-shaped or 



warty tip 8. 



Scutellum not lengthened, semicircular, either flat or convex 14. 



8. — Thorax strongly compre.s.sed from the sides ^C'atillns Fiirst. 



Thorax not compressed 9. 



9.— Scutellum lengthened, without thorn-, awl-, or wart-shaped tip 10. 



Scutellum lengthened, with a thorn-, awl- or wart -shaped tip 11. 



10. — Panip.sidal fuiTows deep, parallel posteriorly *XoNtonotu!9 Forst. 



Parapsidal furrows very feebly impressed or absent.*Aiiil»lyaspis F'orst. 



11.— Scutellum extended in a more or less strong thorn 12. 



Scutellum extended in an awl- or wart -shaped tip, .somewhat shortened and 



compressed laterally 13. 



12. — Bjisal ocelli nearer the eyes than to the apical ocellus : club of 9 anteiniw 



4-jointed ^Leptacis Fiirst. 



Basal ocelli not nearer the eyes ; club of 9 antennae 3-jointed. 



*Isorlioinbu8 Forst. 



