76 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



OProS FLAVICEPS, new Bpecles. 



Female. — Length 4.25 mm. Head transverse, a little wider than 

 the thorax; face sUghtly hairy and indistinctly pmictate, with a 

 median ridge; clypous trmicate anteriorly, a little more than three 

 times as wide as long down the middle and distinctly separated from 

 the mandibles by a transverse opening; malar space slightly longer 

 than the width of a mandible at base; eyes protruding and nearly 

 circular; occipital carina strongly developed at sides of the head, 

 absent behind the vertex; ocell-ocular line more than three times the 

 diameter of an ocellus; mesoscutum polished, without a median 

 impression posteriorly, the parapsidal grooves effaced except at the 

 extreme anterior lateral angles; scutellum smooth; mesopleural im- 

 pression broadly ovate and distinctly crenate; propodeum coarsely 

 rugose; wings hyaline, the stigma broadly lanceolate; recurrent ner- 

 vure joining the second cubital cell some distance below the basal 

 nervure; first radial abscissa shorter than half the width of stigma, 

 second abscissa slightly more than one and one-half times the length 

 of the first transverse cubitus; radial cell long and terminating some- 

 what above the extreme wing-apex. Abdomen long-ovate, its first 

 tergite not much longer than broad and coarsely longitudinally 

 striate, with strong sublateral carinae originating near the lateral basal 

 angles and curved inward; suturiform articulation evident, second 

 tergite striate, broad lateral margins of the second tergite and the 

 third and following tergites smooth; ovipositor exserted nearly the 

 length of the abdomen. Head except eyes, a spot enclosed by the 

 ocelli, and the apices of mandibles stramineous; scape stramineous; 

 flagellum black; thorax and dorsum of abdomen black, the venter 

 of abdomen yellowish; legs including coxae pale stramineous; wing 

 veins and stigma dark brown. 



Type.— Cut. No. 19358, U.S.N.M. 



One female specimen labelled Iowa Exp. Sta., Accession Catalog 

 716. Mr. J. E. Guthrie, of the Iowa Agricultural College, informs me 

 that under the above accession number appears the following data: 

 "Taken at Ames, la., by C. P. Gillette, July 4, 1890, sweeping in 

 fields and woods." 



OPIUS VIERECKI, new species. 

 Plate 34, fig. 2. 



Female. — Length 4.5 mm. Head transverse, narrow antero-pos- 

 teriorly, the posterior orbits above narrow and sloping; eyes very 

 large; face smooth with a median ridge from the antennae to the 

 clypeus; clypeus smooth, nearly four times as broad as long down the 

 middle, separated from the mandibles by a broad opening; antennae 

 broken; mesoscutum and scutellum smooth, polished, the parapsidal 

 grooves deeply impressed anteriorly, becoming indistinct on the disk 



