'() GEXi:iiA OF IIVMKXOI'TERA. 



Marginal vein our and a half times as long as the stigmal ; metathorax 

 with (listim-t lateral folds; club of 'J, antennae blackish. 

 Head with narrow verte-x : 9 ocelli placed in a very sliglitly curved 



line: thorax short Snbgcu. Eutelus Walk. 



Head with broad vertex; cly|)eus incised or truncate at apex; ocelli 

 large, ])laced in a triangle; thorax long, margin of collar sharp; ab- 

 domen elongate, triangular Subgen. *Platytermus Thom. 



Marginal vein not at all or but slightly longer than .stigmal ; metathorax 

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

 narrow. 

 Antennae inserted a little below the middle of the face. 



Subgen. *Amblymerus Thom. 

 Antennse inserted sUghllx' al)ove llii' clypeus; metathorax very short. 



Subgen. *Psilonotus Thom. 

 Terebra ex.serted ; funicle of antennfp tbick, joint 1 in 9 abruptly smaller: 

 thorax above .smooth ; metathorax very short. 



*K<»ptr«<'<'rus Ratz. 

 Antennae inserted almost in the middle of the face which is impressed with 



large punctures Subgen. *Roptrocerus liatz. 



Antennae inserted scarcely above the clypeus Subgen. *Anogmus Forst. 



.loint 1 of antennal funicle most usually large, very rarely abruptly smaller 

 than the others; jio.sterior coxae not pubescent on the hind margin 

 at base ; left mandible usually 3-dentate, the dentations broad at base. 



*.Etro\-.ys Westw. 



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



acutely margined and dilated laterally; metathorax with short folds 



or none at all..... Subgen. *Stenomalus Thom. 



Clypeus without apical tooth, but with a sinuate or truncate apex. 



Wings with a large stigmal club; head with the cheeks often rounded; 

 collar separated, acute and not narrow medially. 

 Metathorax short; clypeus incised in apical middle; mcsothoracic epis- 



terna reaching to coxa- Subgen. *Cecidostiba Thom. 



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

 transverse carina: head uTid thorax usually rigido-pubcsrt nt. 



Subgen. *Caenaci8 Filr.st. 



Wings with a small or medium sized stigmal club; bead often triangular 



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



Head triangular, narrowed towards mouth, fiice not rigido-pubesceut ; 



eyes large, convex, round ; praesternum large ; mesosternal groove 



distinct; the round sjiirailes remote from postscutellum. 



Collar acute. 



"Vertex acute in the middle Subgen. *^troxys Westw. 



Vertex not acute in the middle. 



First funicle joint small. Subgen. *Cricellius Thom. 



First funicle joint large Subgen. *Holcaeus Thom. 



Collar not separated Subgen. *Stinoplus Tliom. 



Head usually with bulging cheeks; eyes not prominent; sti'rnal groove 

 ob.solete ; vertex not acute medially; metatbonicic spiracles 

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

 funicle joint longer than pedicel. 



