284 THE CANADIAN ENTOMOLOGIST. 



Claws with a small or short tooth beneath, a little beyond the middle, 



and which projects nearly at a right angle 2. 



Claws simple, without a tooth. 



First and third submarginal cells small, nearly equal, united 

 shorter than the second ; clypeus emargi- 

 nate Gymnonychus, Marlatt. 



2. Clypeus anteriorly truncate or at most only slightly emarginate ; first 



transverse cubitus often wanting 3. 



Clypeus anteriorly distinctly emarginate ; first transverse cubitus 

 always distinct. 



Marginal cell in hind wings at apex pointed, with an appendage, 

 the second recurrent nervure usually uniting with the first sub- 

 marginal (first discal) cell, at about two-thirds its 

 length Pachynematus, Konow. 



3. Marginal cell in hind wings at apex pointed, 7vith an appendage : head 



with the frontal aiea most frequently wanting, rarely distinct. . . .4. 

 Marginal cell in hind wings pointed, ivithoiit an appendage ; head 

 with the frontal area distinct. 



Second recurrent nervure in hind wings received by the first sub- 

 marginal cell at about two-thirds its length, or a little before, 

 rarely very near its apex ; last dorsal abdominal segment in $ 

 with a carina extending to apex Lygaeonematus, Konow. 



4. Hind wings with the second recurrent nervure received by the first 



submarginal cell at about two-thirds its length or a little before, 

 rarely beyond ; frontal area wanting; sheaths of ovipositor rounded 

 at apex; last dorsal segment in $ with the carina, if present, not 



extending to the apex Pristiphora, Latreille. 



Hind wings with the second recurrent nervure received by the first 

 submarginal cell near its apex or almost interstitial with the second 

 transverse cubitus ; frontal area more or less defined ; sheaths of 

 ovipositor roundly truncate from below ; last dorsal segment in 

 $ triangularly produced Micronematus, Konow. 



5. Front wings with four submarginal cells, or if with three only the first 



transverse cubitus is wanting or subobsolete 6. 



Front wings with three submarginal cells, the third transverse cubitus 

 wanting ; second recurrent nervure in hind wings usually interstitial 

 or uniting with the cubitus a little beyond the first closed submar- 

 ginal cell ; frontal area more or less defined Euura, Newman. 



( -Cryptocampus, Hartig.) 



