212 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. oh. 



ARTHROLYTUS KANSENSIS Girault. 



One female reared from an apple leaf-skeletonizer or from a lace- 

 wing fly associated with the same. Riley County, Kansas, August 

 (C. L. Marlatt). 



j'y.pe — Cat. No. 20874 U.S.N.M., the female on a tag, a caudal leg 

 on a slide. 



DIBRACHYS METEORI Gahan. 



This is a synonym of ArtJirolytus aeneoviridis Girault. Types ex- 

 amined. 



EURYDINOTA RUFIVENTRIS, new species. 



Female — Length, 1.40 mm. 



Like Pteromalus species but the clypeus hardly produced, its distal 

 margin concave and less advanced than the obtuse projections on 

 each side. Also the cheeks are distinctly shorter than the eyes. 

 Abdominal petiole no longer than wide, reddish. 



Dark metallic green, the wings hyaline, the venation dusky yellow, 

 the legs except the concolorous lateral aspect of the coxae and the 

 scape, pedicel and ring-joints, bright reddish yellow, the abdomen 

 dark red except the base and apex and more narrowly, the lateral 

 margins. Propodeum punctate, without a median carina nor spira- 

 cular sulci, the lateral carinae distinct. Like Pteromalus arcMpjn 

 Howard. Pedicel barely longer than wide, the funicle joints elongate, 

 1 nearly thrice longer than wide, 6 twice longer than wide. Post- 

 marginal vein a little longer than the marginal, the long stigmal 

 shortest of the thi-ee. Segment 2 of abdomen occupying over a 

 third of the surface, twice the length of 3, the others transverse- 

 linear, all segments entire; segments 2 and 3 glabrous. Neck of 

 propodeum not abrupt. Mandibles spreading 4-dentate. 



One female in the United States National Museum, Tifton, Georgia. 



Type— Oat. No. 20875, U.S.N.M., the female on a tag, the head 

 and caudal leg on a slide. 



ENDOMYCHOBIUS FLAVIPES Ashmead. 



Genotype. 



This species bears a distinctly petiolate abdomen, the petiole sub- 

 quadrate. 



POLYCYSTUS GIBBUS, new species. 



Female. — Length, 1.15 mm. 



Dark metallic green, the wings hyaline, the scape, apex and under 

 sides of pedicel, pale yellow, the venation, tibiae, and tarsi white. 

 Clypeus and lower face radiate-striate, the head and thorax reticu- 

 lated, the lines raised, the propodeum scaly, distinctly tricarinate, 

 the spiracular sulcus distinct, foveate, a short neck present. Propo- 

 deal spiracle moderate in size, oval. Petiole quadrate. Abdomen 

 ovate, depressed, keeled beneath, as long as the thorax, segment 2 



