76 GENERA OK HYMENOPTERA. 



Marginal vein one and a lialf times as lonjj as the stijrnial ; metathorax 

 with distinct lateral folds; club of % anteiiuie blackish. 

 Head with narrow vertex; 9 ocelli placed in a very slightly curved 



line; thorax short Sul)gen. Eutelus Walk. 



Head with broad vertex; clypeus inci.sed or truncate at apex; ocelli 

 large, placed in a triangle; thorax long, margin of collar sharp; ab- 



ddnieii elongate, triangular Subgen. *Platytermu8 Thoni. 



Margina.' vein not at ail or but slightly longer than stigma! ; nietathorax 

 without lateral fold; first funicle joint very small ; vertex and collar 

 narrow. 

 Antenna; inserted a little below the middle of the face. 



Subgen. *Amblymcru8 Thorn. 

 Aiitennte in.serted slightly above the clypeus; metathorax very short. 



Subgen. *P8ilonotU8 Tlioni. 

 Terebra ex.serted ; funicle of antennse thick, joint 1 in 9 abruptly smaller; 

 thorax above smooth ; metathor.ix very short. 



*Ko|»tro«oru!4 Ratz. 

 Antennie inserted almost in the middle of the face which is iiiii)resse(l with 



large punctures Subgen. *Roptroceru8 Kutz. 



AntenniP inserted scarcely above the clyjieus ...Subgen. *Anognius Filrst. 



.Toint 1 of antennal funicle most usually large, very rarely ul>ruptly smaller 

 than the others; posterior coxse not i)ubeseent on the hind margin 

 at bii.se ; left uuvndible usually 3-dentate, the dentations broad at base. 



**.Htroxy!* Westw. 



Clypeus armed apically in the middle with a tooth; thorax long, collar 



acutely margined and dilated laterally ; metathorax with short folds 



or tione at all Suligen. *Stenomalu8 Tboin. 



Clypeus without apical tooth, but with a sinuate or truncate a])ex. 



Wings with a large stignial club; bead with tin- cheeks often routuled ; 

 collar separated, acute ,nid not narrow medially. 

 Metathorax short; clypeus ncLsed in apical middle; me.sothoracic cpis- 



tcrna reaching to coxa; Subgen. *Cecidos iba Thorn. 



Metathorax not short, often with a fold and often also with a slight 

 transverse carina ; boud and ihorax usually rigido-inibesctnt. 



Subgen. *C8Bnacis Fiirst. 



Wings with a small or medium sized stignial i-lub; h(>ad often triangular 



and with jirominent eyes; collar often not at all or .slightly separated. 



Head triangular, narrowed towards mouth, face not rigido-pubescer.t ; 



eyes large, convex, round; i)ra'sternum large; niesovternal groove 



distinct; the round s])iracles I'emote from po.stscutellum. 



Collar acute. 



Vertex acute in the middle Subgen. *.a;troxy8 Westw. 



Vertex not acute in the middle. 



First funicle joint small. Subgen. *CriceIlius Tliom. 



First funicle joint large Subgen. *Holc8eus Thom. 



Collar not separated Subgen. *Stinoplus Tlio;u. 



Head usually with bulging cheeks; eyes not prominent; sternal groove 

 ob.solete ; vertex not acute medially; metatlioracic spiracles 

 usually large, oval; collar not at all jr .slightly acute; first 

 funicle joint longer than pedicel. 



