568 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 50. 



by a rounded angulation; face and cheeks short, the length of the 

 former about equal to the greatest transverse diameter of the eyes; 

 antennal scrobes prominent, extending the length of the face and 

 uniting above so as to form a half ellipse; eyes large, nearly perfectly 

 oval; occiput rather flat, or but slightly concave, the neck inserted 

 considerably above the center; ocelli in an equilateral triangle, with 

 the posterior pair about twice their own diameter from the occipital 

 rim-. Mandibles tridentate with the middle tooth the largest as in 

 Pseudaphycus. Antennae inserted far apart and close to the border 

 of the mouth, 10-jointed; the scape flattened but narrow, extending 

 considerably above the plane of the vertex; pedicel as long as the 

 entire funicle; the latter 5-jointed, its joints short, and increasing 

 in width distad; club large, oval, rather acutely rounded at apex, as 

 long as the pedicel and funicle combined. Body rather robust, the 

 mesoscutum twice as wide as long, the axillae meeting, the scutellum 

 large and acute at apex; abdomen ovate, about one-half longer than 

 wide, the dorsum becoming slightly concave after death, the fifth 

 ventral sclerite reaching to apex of abdomen and enclosing base of 

 the ovipositor, the latter slender and protruded considerably. Legs 

 rather short and stout, the femora flattened.- Wings fully developed 

 but very narrow; the marginal vein punctiform, the postmarginal 

 nearly one-half the length of the stigmal, the latter moderately long, 

 knobbed at apex and with two short, nearly parallel prongs, the sub- 

 marginal with well-developed bristles. Hind wings narrow, the 

 costal cell extremely narrow, but as wide near the booklets as at 

 base of the wing. Head and thorax smooth and shining, the front 

 and vertex with several rows of minute punctures, the notum of 

 thorax with scattered punctures of the same sort ; the pubescence of 

 head and thorax very fine and dark-colored. General coloration 

 black, but not metallic. 



Male. Essentially like the female in all but the sexual characters. 



Type of genus. Bothriocraeraflawpes, new species. 



BOTHRIOCRAERA FLAVIPES, new species. 



Female. Front and vertex a little over twice as long as the width 

 at the anterior ocellus; dorsal orbits of eyes slightly diverging ante- 

 riorly and to a less degree posteriorly; the ocelli in an equilateral 

 triangle, with the posterior pair about their own diameter from the 

 eye margin; eyes large, oval, with a very fine, short pubescence. 

 Antennal scape flattened and linear; pedicel narrowed at base, as long 

 as all five funicle joints comb hied; the latter all of equal length, the 

 first rounded, as long as wide, the following increasingly transverse, 

 the fifth about twice as wide as long ; club oval, somewhat pointed at 

 apex, about as long as the pedicel and four of the funicle joints com- 

 bined, not quite twice as wide in greatest breadth as the last preceding 



