No it::;'. SOME CANADIAN TENTHREDINOIDEA—ROHWER. 205 



area shining, with distinct punctures; supraclypeal area rounded, 

 but not carinated; antenna] furrows distinct, not curving so strongly 

 to the orbits as in infemata; furrow from the anterior ocellus distinct . 

 extending both above and below; postocellar furrow not sharply 

 defined; third antennal joint distinctly longer than the fourth, fourth 

 and fifth subequal; dorsulum and scutellum shining:, irresularlv 

 finely sculptured; scutellar appendage highly polished; first trans- 

 verse cubitus wanting; sheath rather narrow, and sharply truncate 

 at the apex. Black; most of the clypeus, labrum, angles of pronotum 

 and tegulse pallid; four anterior femora and tibse beneath and base 

 of posterior tibiae dusky pallid; narrow apical margin of ventral seg- 

 ments pale. Wings dusky-hyaline, iridescent ; venation dark brown. 



Male. — Similar to the female; the clypeus is black and the apical 

 margin almost truncate; the scutellar appendage is finely granular. 



Type-locality. — Xerepis, New Brunswick. One female collected 

 July is, by Mr. A. G. Leavitt. One male, which is described as the 

 male, was collected July 14 at St. Johns Bay, New Brunswick, by 

 Mr. A. G. Leavitt. 



Type.— Cat. No. 12027, U.S.N.M. 



Genus MACREMPH YTUS MacGillivray. 



MACREMPHYTUS TARSATUS (Say). 



Female, St. John, New Brunswick, July 17. 



Genus DIMORPHOPTER YX Ashmead. 



DIMORPHOPTERYX MELANOGNATHUS, new species. 



Readily separated from D. pinguis (Norton) by the black labrum, 

 mandibles, antenna 3 and apex of abdomen. 



Female. — Length 7 mm. Emargination of the clypeus angular; 

 front irregularly granular-punctate, behind the supraorbital line and 

 posterior orbits are shining, with ill-defined punctures; antennal 

 fovea 1 large, extending above the middle of the eyes; ocellar basin 

 well defined, but not sharply, joining with the middle fovea below; 

 postocellar area convex; interocellar furrow wanting; first flagellar 

 joint almost as long as second and third, the joints not so strongly 

 constricted basally as in pinguis; mesonotum shining, with large 

 punctures, the lateral lobes more sparsely so; pleurae as in pinguis; 

 sheath very stout, obliquely t runcate at t he apex. Black ; four basal 

 abdominal segments, basal half (or more) of the posterior femora and 

 tibia 1 ruf o-f erruginous ; four anterior legs and posterior tarsi reddish- 

 white. Wings iridescent, hyaline, slightly dusky; venation dark 

 brow 1 1 . 



Type-locality.- Nerepis, New Brunswick. One female collected 

 July 22, by Mr. A. O. Leavitt. 



Type.— Cat. No. 12929, U.S.N.M. 



