THE CANADIAN ENTOMOLOGIST. 203 



4. Middle tibi?e with one apical spur 5. 



Middle tibiae with two apical spurs 7. 



5. Front wings with tJwee cubital cells, the second and third each 



receiving a recurrent nervure. 



Cubitus in hind wings originating much before the transverse 

 cubitus ; second cubital cell in front wings not triangular, very 

 large, trapezoidal, not much larger than the third ; submedian 

 and median cells equal, the transverse median nervure inter- 

 stitial with the basal vein ; mandibles bidentate 6. 



Cubitus in hind wings interstitial or nearly with the transverse 

 cubitus, sometimes originating a little beyond it ; second 

 cubital cell in front wings more or less triangular ; submedian 

 cell usually a little longer than the median (rarely equal in 

 some JBrachycistis), the transverse median nervure usually not 

 interstitial with the basal vein ; mandibles bidentate. 



Marginal cell very short, always much shorter than the 

 oblong stigma ; first abscissa of the radius only about 

 one-third the length of the third cubital cell ; second 

 cubital cell triangular, usually receiving the first recurrent 

 nervure before the middle, not, or rarely, longer than the 

 third; abdomen with a more or less distinct constriction 

 between the first and second segments ; scutellum rounded, 



subconvex ; ocelli large Brachycistis, Fox. 



Marginal cell not short, about as long as the large oblong 

 stigma ; first abscissa of the radius as long, or nearly, as 

 the third cubital cell ; second cubital cell at least three 

 times as long as the third, receiving the first recurrent 

 nervure beyond the middle ; third cubital cell quadrate, 

 or nearly, a little wider (higher) than long, receiving the 

 second recurrent a little before its middle ; scutellum 

 quadrate; ocelli large, the laterals about their width from 



the eye margin Milluta, Andre'.* 



(Type M. chobauti, Andre.) 



6. Marginal cell much longer than the large oblong stigma ; lanceolate ; 



first abscissa of the radius short, less than one-third the length of 

 the third cubital cell ; third cubital cell large, much longer than 



*I am greatly indebted to Mons. Ernest Andre, for the loan of the unitjue type 

 of this genus. 



