206 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Anteuuii! 12-jointed in both sexes: in 9 eliivate, the ckib large, 6- 

 joiuted, the last two fuuielar joints Uiiiiute; in S filiform. 



Maxillary palpi 3-jointed. 



Mandibles bifid, the teeth equal. 



Thorax short, subovoid, the i)rothorax not at all visible from above; 

 the mesoiiotum more than twice as wide as long, without farrows; 

 scutellum short, transverse; iK)stscutellum not spiiied, simi)le; meta- 

 thorax very short, the angles subacute or acute. 



Wings most frequently wanting, when present with the venation as 

 in Tclcas, the nmrginal vein rarely more than 4 times as long as the 

 stigmal. 



Abdomen broadly oval, the first and second segments short, trans- 

 verse, of nearly an equal length, usually striated, the third very large, 

 but broader than long. 



Legs as in Prosacaiitha, the tibial spurs weak, the basal joint of hiuu 

 tarsi a little more than thrice as long as the second. 



Closely allied to Prosaeantha and HopJofjryon, but separated from both 

 by the simple, not tsinned, postscutellum. 



Dr. Forster's description of this genus in the Hym. Stud, is scarcely 

 correct and very misleading. I have recognized the genus by Walker's 

 figure of the male in Ent. Mag., Vol. in, PI. xiii, Fig. 5, which plainly 

 shows its relation to Prosaeantha^ but is distinct in having the post- 

 scutellum simple, not spined, and the basal abdominal segment much 

 broader than long, not petioliform. 



TABLE OF SPECIES. 



FEMALES. 



Wingless species 2 



Winged. 



Head and thorax finely puuctulate; metathoracic angles obtuse. 

 Mesonotnni with traces of furrows posteriorly. 



CoxiTP and legs yellow G. FUiMiPKNNLS, sp. nov. 



2. Head and thorax finely, closely punctulate, subopaque, the lower part of face 

 with striic converging toward the mouth. 

 All coxie black; first and second abdominal segments striated. 

 Metathoracic angles obtuse or subacute. 



Legs pale rufous or brownish-yellow; abdomen shining, but microscopic- 

 ally }>unctate G. hokkali.s Ashm. 



Legs fuscous, the trochanters, knees, and tarsi yellow; abdomen polished, 



impunctate G. canadensis Ashm. 



Metathoracic angles acute. 

 Legs brownish-yellow; abdoiuen, above and beneath, punctate, subopaque. 



G. COLUMBIANUS, Sp. nOV. 



All coxic pale; metathoracic angles obtuse. 



Legs pale yellow; abdomen sraootli shining G. flavipks. sp. nov. 



Gryon fumipennis, sp. nov. 



9. Length, 1.40""". Black, shining, minutely punctulate; face 

 smooth, polished, with faint stria) at the mouth ; mandibles and legs 



