246 THE CANADIAN ENTOMOLOGIST. 



Cubital and discoidal cells wanting, the cubital vein alone present, 

 but much abbreviated ; eyes slightly convergent above ; man- 

 dibles excised beneath Miscophoides, Brauns. 



3. Front wings with two recurrent nervures 4. 



Front wings with only one recurrent nervure. 



With two cubital cells 3. 



With only one cubital cell ; submedian cell in both wings much 

 shorter than the median. 



Marginal cell large, longer than the first cubital cell, sub- 

 truncate at apex, with a slight appendage ; mandibles acute, 



not excised beneath Nitela, Latreille. 



Marginal cell rather small, much shorter than the first cubital 

 cell, somewhat rounded at apex, without an appendage; man- 

 dibles acute, but excised beneath Nitelopterus, Ashm. 



3. Wings abbreviated, the stigma not developed; marginal cell small, 



triangular; cubital cell very large, rhomboidal : collar well de- 

 veloped, as long as the metathorax, narrowed anteriorly ; mandibles 

 deeply excised beneath, pointed at apex, without teeth 



within Saliostethus, Brauns. 



Wings normal, the stigma small but distinct ; marginal cell as in 

 Miscophus ; submedian cell shorter than the median; eyes large, 

 extending to base of mandibles, and only slightly convergent 

 above ; mandibles beneath deeply excised from a little before the 

 basal half to apex ; antenna filiform, slightly tapering off towards 

 apex ; clypeus not separated from the face by a suture ; occiput 

 with a transverse furrow between the occipital margin and the base 

 of the vertex ; metathorax fully as long as the mesonotum, with a 



delicate median carina Miscophinus, Ashm. 



[=Hypomiscophus, Ckll.] 



4, Marginal cell without an appendage at apex ; second cubital cell 



receiving the second recurrent nervure towards apex; cubitus in 



hind wings originatmg fir beyond the transverse median nervure ; 



eyes convergent above Miscophus, Jurine. 



Subfamily IV. — Pisoniuce. 



In this group the front wings have two or three cubital cells, the 

 second always triangular and most frequenly petiolate ; the eyes are often 

 emarginate within ; the ocelli distinct ; while the pygidium in the females 

 always has a distinct pygidial area. 



