90 PROCEEDINOH OF THE NATIONAL MUSEUM. vol.49. 



OPIUS GRACILLARIAE, new species. 

 Bracon gracillanae Ashmead, MS, Insect Life, vol. 2, 1890, p. 349. 



Female. — Length 1.3 mm. Head transverse, smooth and pohshed, 

 the face nearly smooth and without a distinct median ridge; clypeus 

 about twice as broad as long and separated from the mandibles by an 

 elliptical opening; posterior orbits about half the width of the eyes 

 and receding; malar space shorter than the width of a mandible at 

 base; antennae broken, inserted slightly above the middle of the eyes, 

 the first flagellar joint nearly four times as long as thick; mesoscutum 

 smooth, the parapsidal grooves absent except at the anterior angles, 

 ^A^ithout a median impression; mesopleurae smooth, the impression 

 below the middle faintly crenulate; propodeum rugose; wing-stigma 

 moderately narrow, emitting the radius at the basal one-third; first 

 radial abscissa about half as long as the width of stigma; second 

 abscissa about twice the length of the first cubital crossvein; third 

 abscissa twice the length of the combined first and second abscissae, 

 sHghtly curved into the radial cell and attaining the wing margin only 

 a trifle above the extreme wing-apex. First, second, and third abdom- 

 inal tergites granularly rugulose, the suturiform articulation dis- 

 tinct ; second tergite longer than the third ; following tergites smooth ; 

 ovipositor barely exserted. Head and thorax piceus; mandibles, 

 palpi, scape, clypeus, legs including coxae, tegulae, metapleurae, 

 most of the propodeum, and the first and second abdominal tergites 

 pale stramineous; antenna! flagellum dark brown, the basal joints 

 slightly paler; apex of abdomen blackish; wings hyaline, the veins 

 and stigma brownish yellow. 



Type-locality. — Kirkwood, Missouri. 



Type.— Cat. No. 19373, U.S.N.M. 



Described from one specimen. The reference above cited states 

 that the specimen was reared by Miss Murtfeldt from Gradllaria des- 

 modieUa. This record needs to be verified. 



OPIUS NANUS Provancher. 

 Opius nanus Provancher, Add. Faun. Can. Hym., 1888, p. 382. 



The type of this species is from California and is very similar to 

 graciUariae but may be distinguished by the characters used in the 

 key. 



Habitat. — California. 



Host. — Unknown. 



OPIUS OSCINIDIS Ashmead. 



Plate 35, fig. 10. 

 Rhyssalus osdnidis Ashmead, Proc. U. S. Nat. Mua., 1888, vol. 11, p. 630. 

 Eutrichopsis osdnidis (Ashmead) Viereck, Proc. U. S. Nat. Mus., vol. 44, 1913, 

 p. 559. 



Habitat. — District of Columbia and Indiana. 

 Host. — Dipterous leaf miner in Plantago. 



