THE CANADIVK KNlOMOLUGJbT. 



Second cubital cell receiving both recurrent nervures j. 



Second cubital cell receiving only one recurrent nervure — the 

 second, the first recurrent nervure received by the first cubital 

 cell near its apex. 



Transverse median nervure interstitial with the basal nervure, 

 or uniting with the median vein a little before it ; cubitus in 

 hind wings originating beyond the transverse median nervure ; 

 eyes somewhat convergent above ; mandibles excised be- 

 neath beyond the middle Sericophorus, Smith. 



= Tachyrhostrus, Sauss. 



3. Transverse median nervure interstitial with the basal nervure ; cubitus 



in hind wings originating somewhat beyond the transverse median 

 nervure ; collar long ; eyes parallel ; mandibles strongly excised 



beneath Lyroda, Say. 



Transverse median nervure uniting with the median nervure before the 

 origin of the basal nervure ; cubitus in hind wings originating much 

 before the transverse median nervure. 



Eyes submarginate within, convergent above ; clypeus transverse, 

 the anterior margin arcuate ; mandibles at apex acute, un- 

 armed ; beneath excised beyond the 



middle Laphyragogus, Kohl. 



Eyes not at all emarginate vvithin, strongly convergent above : 

 clypeus large ; mandibles excised beneath with two blunt 

 teeth on inner margin Leianihrena, Bingham. 



4. Submedian cell much shorter than the median ; second cubital cell 



receiving both recurrent nervures • cubitus in hind wings originating 

 beyond the transverse median nervure Gastrosericus, Spinola. 



SuBF.\MiLY III. — Nitelinse. 



In this group the ocelli are also distinct, but the venation of the 

 front wings is quite distinct from the Lyrodinas, while the pronotum is 

 shorter, transverse. From the Pisonince it is also distinguished by 

 venation, and by having no pygidial area. 



The genera falling in this group are distinguished as follows : 



Table of Genera. 



Front wings i^<ith a marginal cell : 2. 



Front wings without a marginal cell. 



