350 BULLETIN 45, UNITED BTATES NATIONAL MUSEUM. 



TABLE OF HPEOIES. 



FKMALK8. 



Body of abdomen black, the tip alone "ufons. 

 AntenniB iw long as the body, very Hieudor, brownish-yellow, fuscous toward tips, 

 the second flagellar joint about 5 times as long as thick. 



L. CONICU8, sp. nov. 

 Body of abdomen rufous. 

 Antonn:e extt^ud only to the base of the abdomen, rufous, the 7 terminal joints 

 moniliform L. kufus, sx). nov. 



MALES. 



Entirely rufous L. kufus, Ashm. 



Entirely black L. conicus, sp. nov. 



LeptorhaptuB conious, sp. nov. 

 (Plato XIV, Fig. 1, $.) 



S9. Length, 3 to 4""". Black, shining; aiitemia', mandibles, palpi, 

 tegulfe ami legs brownish-yellow ; the antennai toward tips fuscous; tip 

 of abdomen rufous. Antennre in 9 15-jointed, as long as the body, 

 slender, filiform, the scape very long, the pedicel rounded, the first 

 flagellar joint half the length of the scape, the joints beyond to the last 

 very gradually subequal, the last a little longer than the penultimate, 

 thrice as long as thick. In the S the antennae are 14-jointed, the scape 

 much shorter, the first flagellar joint is about two-thirds the length of 

 the scape excised at base. Thorax with two furrows, the scutellum with 

 a deep fovea at base, the metathorax carinated and rugose at the 

 sides. Abdomen long, conic-ovate, the petiole thrice as long as thick, 

 fluted. Wings hyaline, the pubescence fuscous, the venation pale brown ; 

 the marginal vein is as long as the marginal celi. In the S the venation 

 is darker; the petiole is twice as long as the metathorax or four times as 

 long as thick, slightly narrowed basally and apically, smooth, shining, 

 with a grooved line at sides and a few punctures above ; the body of the 

 abdomen is pear shaped, smooth and shining, with 3 grooved lines at 

 extreme base and pubescent at tip. 



Habitat. — Arlington, Va., and Cedar Point, Md. 



Types S 9 m Coll. Ashmead. 



Described from 4 9 and 1 $ . 



LeptorhaptuB rufuB, sp. nov. 



$ 9 . Length, 4 to 4.5""". The S is entirely rufous; the antennae, man- 

 dibles, palpi, tegulae and legs pale brownish-yellow, the antennje toward 

 tips fuscous. First flagellar joint as long as the scape and pedicel to- 

 gether, excised at base, the following joints to the last, long, cylindrical, 

 subequal. Mandibles bifid at tips with a large tooth within. Thorax 

 with two furrows, the scutellum with a large fovea at base which is 

 itself bifoveated at bottom, the metathorax with three keels. Body of 

 abdomen long, pear-shaped, the petiole very long, four times as long as 

 the metathorax or six or more times longer than thick, smooth and 



