206 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Antennsc 12. jointed in both sexes; in 9 clovate, tlic clnb large, 6- 

 joint( J, the last two lunirlar joints minute; in S liliforni. 



Maxilhir^v palpi .'i-Jointed. 



Mandibles bifid, the teeth equal. 



Thorax short, subovoid, the piothorax not at all visible from above; 

 the iiiesonotum more thau t\vi<-c as wide as long, without furrows; 

 scutelluni short, transverse; postseutellum not si)iiied, simple; meta- 

 thorax very short, the angles subaeute or acute. 



Wings most fre([uently wanting, when present with the venation as 

 in Tdeas, the nuirginal vein rarely more thau 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 rromctintha, the tibial spurs weak, the basal joint of hinu. 

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



Closely allied to rrosacantha and Hoplogryon, but separated from both 

 by the siniple, not ainneiJ, postseutellum. 



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

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

 figure of the nnile in Ent. Mag., Vol. m, Pi. xiii. Fig. 5, which plainly 

 shows its relation to Prosavantha, but is distinct in having the post- 

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

 broader than long, not i)eiioliform. 



TABLE OF SPECIES. 



fkmai.es. 



Wingless species 2 



Winged. 



Head and thorax lincly pnuctulate; metathoracic angles obtnse. 

 Mesonotnni with traces of fnrrows posteriorly. 



Coxa> and legs yellow G. fumipknnis, sp. nov. 



2. Head and thorax iincly, closely puuctulato, siibopaque, the lower part of face 

 with striic converging toward the month. 

 All cox» hliick; lirst and second abdominal segments striated. 

 Metathoracic angles obtuse or snbacnte. 

 Legs pale rufoii.s or brownish-yellow; abdomen shining, bnt microscopic- 

 ally pnnctato G. boreai.is Ashm. 



Legs fascons. the trochanters, knees, and tarsi yellow; abdomen polished, 



iinpunctati> G. canadensis Ashm. 



MetatUoracic angles acnte. 

 Legs ^^ro"'nish-yellow; abdomen, above and beneath, pnnetate, subopaque. 



G. COLUMBIANUS, sp. nov. 

 All coxt-B pale ; metathoracic angles obtuse. 

 Legs pale yellow ; abdomen smooth shining G. flavipes, sp. nov. 



Oryon fumipennis, sp. nov. 



5. Length, 1.40'"'". Black, shining, minutely puncto.late; face 

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



f 



