296 THE CANADIAN ENTOMOLOGIST. 



Only five genera fall into this group, distinguishable as follows : 



Table of Genera. 

 Cubitus in hind wings interstitial with the transverse median nervure. . 2. 

 Cubitus in hind wings originating beyo?idi\\Q. transverse median nervure. .4. 



2. Mesosternum normal, unarmed 3. 



Mesosternum armed with a large conical tooth or spine just before the 



middle coxse. 



Second and third cubital cells along the cubitus subequal, the 

 third the broadest ; femora in $ much 

 thickened (i) Macromeris, Lepel. 



3. Second and third cubital cells equal, or very nearly, united only about 



as long as the first. 



Mandibles simple, edentate ; antennae in ^ with the flagellar 



joints pectinate ( $ unknown) (2) Clavelia, Lucas. 



Mandibles bidentate ; antennae in ^ normal, the hind coxre pro- 

 duced anteriorly into a conical tubercle, in $ simple ; meta- 

 thorax with a median longitudinal 



furrow (3) Paragenia, Bingham. 



Second cubital cell much shorter than the third ; clypeus usually 

 triangular, more or less prominently pointed, subconvex medially ; 

 mandibles dentate ; antenni^e filiform (4) Pseudagenia, Kohl. 



4. Third cubital cell, along the cubitus, as long or a little longer than the 



second ; claws cleft or with a tooth near the middle, rarely simple; 

 eyes extending to base of mandibles ; abdomen with a constriction 

 between segments i and 2. 



Body variable; head transverse, wider than the thorax; maxillae 

 in ^ with a bunch of long, beardlike hairs at base ; abdomen 

 ovoid, sessile, subsessile, or briefly petiolate ; claws cleft or 



with a tooth beneath (5) Agenia, Schiodte. 



= Pogonius, Dahlb, 



Body very slender; head lenticular; maxillae in $ normal, not 

 bearded ; abdomen very long, subcompressed, clavate, the first 

 segment distinctly petiolate ; claws 

 simple (6) Stenagenia, Saussure. 



