206 THE CANADIAN ENTOMOLOGIST. 



The genera now known may be separated as follows : 



Table of Genera. 



Antennae 10-12 jointed 2. 



Antennae 9-jointed, the six terminal joints very short, together not 



, longer than the scape and less than half the length of the third 



joint ; clypeus with a median emargination ; claws with an erect 



tooth before tip Macroxye/a, Kirby. 



2. Clypeus anteriorly triangularly produced at the middle ; all tibiie very 

 spinous, the hind tibi;e with four lateral spurs beneath. 



Claws cleft; antennce lo-ii jointed (the tenth sometimes 



divided into two joints), the seven or eight terminal joints 



very short, together not longer than the scape or less than 



one-fourth the length of the third joint ; only one transverse 



radial nervure joining the second cubital cell, ^fegaxyela, A.%\\m. 



Claws with a large erect tooth before the middle ; antennse 



i2-jointed, the nine terminal joints much shortened, together 



much shorter than the third joint; both transverse radial 



nervures joining the second cubital cqW.. F/euronetira, Konow. 



Subfamily II. — Xyelin.e. 



The species at present known in this group are very small and are 



readily distinguished by having the intercostal vein united with the 



subcostal, by having only one complete submarginal cell in the hind 



wings, and by the longer ovipositor. Their larvte are apparently internal 



feeders. 



Only two genera are known, separated as follows : 



Table of Genera. 

 Antennpe 12-jointed, the nine terminal joints slender, lengthened, together 

 as long or longer than the third joint ; claws long, slender, with a 

 very minute, nearly obsolete, tooth beneath, a little beyond the middle. 

 Front wings with both transverse radial nervures received by the 

 second cubital cell, rarely with the second transverse radius inter- 

 stitial ; clypeus with a median ridge, which is slightly extended 

 beyond the anterior margin, but scarcely triangularly pro- 

 duced Afanoxyela, Ashm. 



Front wings with the first transverse radial nervure received by the 

 second cubital cell, the second transverse radius received by the 

 third cubital cell ; clypeus anteriorly triangularly produced 

 medially Xyeia, Dalman. 



