204 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 53. 



NEOPIUS CARINATICEPS, new species. 



Male. — Length 2 mm. Head transverse, twice as broad as long as 

 viewed from above; vertex and fronscoriaceously wrinkled, the vertex 

 posteriorly with a row of large punctures along the occipital carina : 

 face strongly granularly sculptured w^ith a polished elevated median 

 line or ridge; clypeus nearly smooth, elevated anteriorly and form- 

 ing with the mandibles a transverse elliptical opening; eyes ellip- 

 tical; malar space about equal to the base of a mandible; posterior 

 orbits nearly as broad as the eye width, polished as are also the 

 cheeks; antennae 26-jointed in the type, the first flagellar joint sub- 

 equal in length to the combined scape and pedicel, the second and 

 following joints shorter and decreasing in length toward the apex of 

 antennae; mesoscutum shining with faint coriaceous sculpture, more 

 distinct posteriorly, the parapsidal grooves deep and crenulate an- 

 teriorly becoming shallow behind the middle and terminating in a 

 deep median fovea in front of the scutellum; transverse groove at 

 base of scutellum crenulate; scutellum shining, very faintly cori- 

 aceous ; mesopleura strongly coriaceous, with a curved depressed area 

 below the tegulae and the episternauli deeply foveolate; propodeum 

 coarsely rugose, without carinae; second radial abscissa longer than 

 the first intercubitus by about the length of the second intercubitus, 

 second cubital cell narrowed apically, recurrent nervure interstitial, 

 radial cell terminating considerably before the extreme wing apex; 

 stigma lanceolate, emitting the radius at about its basal one-third; 

 abdomen ovate, about as long as the thorax; first tergite bicarinate, 

 rather narrow and completely rugulose; following tergites polished. 

 Head reddish testaceous, with the face medially, the frons entirely, 

 the vertex except a broad orbital line, and the occiput above black: 

 thorax and abdomen except the second tergite black; second tergite 

 for the most part and all of the legs including their coxae reddish 

 testaceous; wings hyaline, venation pale brownish. 



Female. — Agrees with description of male, except that the antennae 

 in female allotype are 30-jointed; the malar space is somewhat 

 shorter than the basal width of a mandible, and the first tergite is 

 broader at apex than at base, one and one-half times as long as broad 

 at apex and striato-rugose with the lateral carinae less apparent : ter- 

 gites beyond the first piceus; ovipositor concealed from above. 



Type-locality. — Wimbledon, North Dakota. 



Type.— Cat ^o. 20381, U.S.N.M. 



Three male specimens from the type-locality, reared, according to 

 the labels, from "Agromyza mine in Hordeum," by C. N. Ainslie and 

 recorded in the Bureau of Entomolog}" under Webster No. 18761. 

 Allotype female and a paratype male from New Jerse3^ 



