350 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



TABLE OF SPECIES. 



FKMALKS, 



Body of iibdomcu black, tlio tip aloue rufous. 

 Anteume as long as the body, very slender, brownish-yellow, fuscous toward tips, 

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



L. coNicus, sp. nov. 

 Body of abdomen rufous. 

 Antenn;e extend only to the base of the abdomen, rufous, the 7 terminal joints 

 moniliform , , L. kufus, sp. nov. 



MALES. 



Entirely rufous L. rufus, Ashm. 



Entirely black L. coNicus, sp. nov. 



Leptorhaptus conicus, sp. nov. 

 (Plate XIV, Fig. 1, 9-) 



S 9. Leiigtli, 3 to 4" '". Black, sMning; auteiiHSB, mandibles, palpi, 

 teguliie andlejj;sl)io\vnisli-yellow; the anteniiie toward tips fuscous; tip 

 of abdomen rufous. Antenuie in 2 15-joiuted, as long as tbe body, 

 slender, filiform^ tbe scape very long, tbe pedicel rounded, the iirst 

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

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

 thrice as long as thick. In the $ tbe antennae are 14-jointed, tbe 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, tbe metatborax carinated and rugose at the 

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

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

 the marginal vein is as long as tbe marginal cell. In the S the venation 

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

 long astbick, slightly narrowed basally and apically, smooth, shining, 

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

 abdomen is i^ear shaped, smootb and shining, with 3 grooved lines at 

 extreme base and pubescent at tip. 



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



Types 5 $ in Coll. Asbmead. 



Described from 4 $ and 1 S . 



Leptorhaptus rufus, sp. nov. 



S 9 , Length, 4 to 4.5""". The S is entirely rufous; tbe antennfe, man- 

 dibles, palpi, tegulfc and legs i)ale brownish-yellow, the antennne toward 

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

 gether, excised at base, tbe following joints to tbe 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, tbe metatborax with three keels. Body of 

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

 tbe metatborax or six or more times longer than thick, smootb and 



