308 THE CANADIAN ENTOMOLOGIST. 



Eyes not extending to base of mandibles, the malar space there- 

 fore distinct, as long or longer than the pedicel 9. 



Eyes extending to base of mandibles, or very nearly ; lanceolate 

 cell with an oblique cross-nervure, very rarely with a straight 

 or perpendicular cross-nervure. 



Hind wings with two discal cells 7. 



Hind wings with one discal cell 6. 



Hind wings without a discal cell 4. 



4. Hind wings normal, without a bordering nervure at apex 5. 



Hind wings with a bordering nervure at apex, although occasionally 

 wanting between the radius and the cubitus. 



Bordering nervure wanting at apical cell between the radius and 

 cubitus ; head and thorax coarsely cribrately punctate, opaque; 

 antenn.^ rather short, stout, not tapering towards 



apex. S Pseudosiobla, Ashm., n. g. 



(Type S. excavata, Nort.) 



Bordering nervure entire ; head and thorax smooth, shining, 

 at the most sparsely punctate, except sometimes the head 

 anteriorly ; antenna neither short nor stout, tapering toward 

 tips, the third joint longer than the fourth ; claws cleft. 



Anal cell in hind wings as long as the submedian ; flagellar 

 joints cylindrical. S . . Strongylogastroidea, Ashm., n. g. 



(Type S. apicalis. Say.) 



Anal cell in hind wings a little longer than the sub- 

 median ; flagellar joints sub-compressed. 



^ Dimorphopteryx, Ashm., n. g. 



(Type S. pinguis, Say.) 



5. Anal cell in hind wings as long as or longer than the submedian ; 

 clypeus deeply semicircularly emarginate ; claws cleft. 



Transverse median nervure uniting with the median vein at the 

 middle of the first discoidal cell ; third antennal joint not 

 quite as long as joints 4-5 united ; hind tarsi not longer than 



their tibiae Parasiobla, Ashm., n. g. 



(Type S. rufocinctus, Nort.) 



Transverse median nervure uniting with the median vein much 

 before the middle of the first discoidal cell ; third antennal 



