232 PROCEEDINGS OP THE NATIONAL MUSEUM. vol.43. 



discoidal cell. Black; apices of four anterior femora their tibiae 

 and tarsi (the tarsi are dusky), basal half of hind tibiae white; the 

 apical half of hind tibiag and their tarsi brownish; wings hyaline, 

 slightly dusky; venation dark brown, stigma pale brown. 



Oxbow, Saskatchewan, Canada. One male collected June 21, 1907, 

 by Frederick Knab. 



Type.— Cat. No. 14499, U.S.N.M. 



Genus NEOCHARACTUS Mac Gillivray. 



NEOCHARACTUS MONTI VAGUS (Cresson). 



Selandria (Monophadnus) montivaga Cresson, Trans. Amer. Ent. Soc, vol. 8, 

 1880, p. 13. 



Paratyjje.— Cat. No. 14555, U.S.N.M. 

 The teeth ot tarsal claws are small. 



Genus MONOPHADNUS Hartig. 



MONOPHADNUS TRUNCATUS, new species. 



Female. — Length, 5 mm. Anterior margin of clypeus truncate, sur- 

 face with large, distinct punctures; supraclypeal area triangular, 

 defined laterally by sutures shghtly convex ; supraclypeal f ovese deep, 

 punctiform, not connected with the antennal f ovese; antennal furrows 

 complete, except the interruption by the strong frontal crest; middle 

 fovea elongate, sharply defined; ocellar basin triangular; postocellar 

 area convex, more than twice as long as broad; postocellar fur- 

 row well defined; postocellar fine very little shorter than the ocelloc- 

 ular line; scape globose; pedicellum with the apical width and length 

 subequal; first joint of the flagellum subequal in length with the two 

 following; scutellum more closely punctured than the mesoscutum, 

 lobe sliining in middle, finely striate laterally; stigma broadest near 

 base, tapering to apex; sheath parallel sided, truncate apically, 

 rounded below. Black; posterior angles of the pronotum narrowly, 

 tegulag, and legs below apices of femora white; wings slightly dusky, 

 hyaline; venation dark brown. 



Oxbow, Saskatchewan, Canada. One female collected June 1, 1907, 

 by Frederick Knab. 



Type.— Cat. No. 14553, U.S.N.M. 



Genus PERCLISTA Konow. 

 PERCLISTA QUERCUS, new species. 



Superficially Hke alhicollis (Norton), marginicollis (Norton), and 

 purpuridorsuin Dyar, but may be easily separated by the emarginate 

 clypeus. The black stigma is a good recognization character for this 

 species. 



Female. — Length, 5.5 mm. Anterior margin of the clypeus deeply, 

 angulately emarginate, lateral lobes broad rounded apically, surface 



