358 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Antenna' inserted on ii frontal i)ronnnen('e; in 9 lo-jointed, snbmo 

 niliform; tlie scape subrobust, extending sliglitly beyond tbe oceUi, cyl- 

 indric; pedicel oblong; first flagellar joint longer, obconic; tlie joints 

 after tbe fourth, moniliform or snbmoniliforni, the last ovate; in S 14- 

 jointed, long, filiform, the first Hagellar joint about two-thirds the length 

 of the scape, the following a little shorter, all covered with a sliort 

 pubescence. 



Maxillary paljn long, 5-jointed, the last joint the longest; labial palpi 

 short, o-jointed. 



Mandibles short, curved, acute at tij), with a small tooth within. 



Thorax as iu Belyta, but with a large, acute si)inc at base of meta- 

 thorax, the scutellum highly convex, with a furrow at sides, the i)os- 

 terior angles of the metathorax acute. 



Front wings pubescent, Avith a basal cell and a closed marginal cell, 

 rarely a little open toward apex. The marginal cell is always distinctly 

 longer than the marginal vein, tlie stigmal being more or less oblique; 

 hind wings with one cell. 



Abdomen oval or oblong-oval, the petiole stout, fluted, a little longer 

 than thick (longer and more slender in the S ), the second segment 

 very large, occupying most of the surface, sulcate at base, the follow- 

 ing segments very short. 



Legs as in Belyta, pilose, the tibial spurs distinct, basal joint of hind 

 tarsi twice as long as the second. 



Oxylabis spiuosus Prov. 

 (PI. XIV, Fig. 5, 9.) 



Aneurrhynchus s2)lnosus Prov., Fanii. Ilym., ii, p. 560. 

 Oxylahi.s !i2>hiositfi Prov., Add., p. 405. 



9. Length, 2.5""". Kobust, polished black; legs and antennae ru- 

 fous. Antenna' lo-jointed, submoniliform; the pedicel is abonthalf as 

 long as the first flagellar joint, which is the longest joint; the three fol- 

 lowing joints longer than thick, the remaining joints moniliform. Meso- 

 notnm with two broad, deep furrows. Scutellum with a deep fovea 

 at base, i)osteriorly elevated, convex. J'ostscutellum with a large, 

 acute, rufous spine. Metathorax with a central groove, posteriorly mar- 

 gined, the angles acute. Tegnhv rufous. Wings fuscous, the marginal 

 vein long, the nnuginal cell almost closed. Abdomen oblong oval, cov- 

 ered with a grayish pubescence; the petiole l)road and stout, hardly 

 longer than thick, flnted; the second segment very large, with sparse 

 punctures and channeled or groovc<l at base, the following segments 

 very short. 



IlAHiTAT. — Ca}) Ivonge, Canada, and Arlington, \'a. 



Type 9 in Coll. Provancher. 



The above description is drawJi n[) from a specimen, agreeing in all 

 particulars with Provanchei's descniption, and collected by myself iu 

 Virginia. 



