312 THE CANADIAN ENTOMOLOGIST. 



been unable to obtain a copy of the work, in which it was described, in 



any of the libraries of Washington and Philadelphia. 



The numerous genera belonging to the group may be tabulated as 



follows : 



Table of Genera. 



Lanceolate cell with an oblique or straight crossnervure usually situated 



a little before the middle . 5. 



Lanceolate cell contracted and closed a little before the middle. 



Hind wings without a discal cell 4. 



Hind wings with one discal cell 3. 



Hind wings with two discal cells. 



Malar space wanting or scarcely apparent, the hind coxae much 



elongated 2. 



Malar space distinct, the hind coxae norro,al. 

 Contraction of lanceolate cell very short. 



Anal cell in hind wings as long as the submedian. 



Marginal cell normal. $ . ... Perineura, Hartig. 



( = Synaireina, Hartig.) 



Marginal cell with two transverse radial nervures. 



5 . (An anomalous form of Perineura, named 



Bivena, MacGillivray.*) 



Anal cell in hind wings shorter than the submedian. 



Head and thorax opaque, cribrately punctate ; 



antennae short Sciopteryx, Stephens. 



(? = Zermakia, Jakow.) 

 Head and thorax smooth, shining, at the most 

 sparsely punctate ; antennae not 



short Rhogogastera, Konow. 



Contraction of lanceolate cell long ; anal cell shorter than 

 the submedian ; clypeus semicircularly emarginated ; 

 claws cleft Pachy protasis, Hartig. 



2. Anal cell in hind wings shorter than the sub- 



median Macrophya, Dahlbom. 



3. Hind wings with a surrounding nervure at apex, the anal cell a little 



shorter than the submedian. $ Tenthredopsis, Costa. 



'*Mr. MacGillivray has kindly sent me the type of Bivena for study, and I find it 

 to l)e an anomalous form of Perineura aiiiericana, Provancher. It also bears a super- 

 ficial resemliJance to P. delta, Prov. , liut Ihe anal cell in tlie latter is not contracted, hut 

 has a cross-ner'i'iire. 



