MONOGKAPH OF THE NORTH AMERICAN PROCTOTRYPIDiE. 273 

 Leptacis striatifrons, sp. uuv. 



9 . Length, 1 .2" "". Black, shining ; frons transversely striated ; thorax 

 smootl, with indications of furrows posteriorly; antennae, except the 

 club, and legs wholly brownish-yellow; club 4-joiuted, brown, the 

 joints (except the conical last joint) not, or scarcely, longer than thick. 

 Scutelluni bifoveated at base and ending in a long awl-shaped thorn 

 Metathorax covered with a dense white ]>ubescencc. Wings hyaline. 

 Abdomen subovate, shorter than the thorax, black, polished, impunc- 

 tured, the petiole very short, transverse, pubescent. 



Habitat. — Jacksonville, Fla. 



Type in Coll. Ashmead. 



Leptacis longiveutris, s{>. iiov. 



S 9. Length, 1"""'. Polished black, impunctured; tarsi rufo-piceons. 

 Head as wide as the thorax from teguhc to teguhe. Mandibles black. 

 Antennne 10-jointed, in 9 with a 4-joiuted club, the joints, except the 

 last, a little wider than h)ng, the last conical, twice as long as the pre- 

 ceding; funicle slender, the second joint long and slender, the first and 

 last two, short. Thorax without distinct furrows, a slight elevation or 

 prominence just in front of the scutelluni, and with a sparce pubescence 

 on either side. Mesopleura smooth, polished. Scutelluni with a tu- 

 bercle at tip, two oblique depressions at base, a median carina, and 

 sparsely covered with a silvery i^ile. Metathorax at base, nietapleura, 

 and base of abdomen densely covered with a silvery x>'ibescence. 

 Tegula» black. Wings hyaline, iridescent, but slightly ])ubescent and 

 without a distinct fringe. Abdomen pointed-ovate, twice the length 

 of the thorax, subcompressed, and in shape not unlike the 9 in Eury- 

 fowj«, but with the lateral carina quite distinct; the first segment is 

 densely imbescent, the second occupies most of the surface, the third, 

 fourth, fifth, and sixth very short, equal, the seventh conical, as long 

 or a little longer than the four preceding together. 



in the $ the anteniue aiC bristly, the pedicel oval, the first funiclar 

 joint minute, rounded, the second, longer than the pedicel, swollen and 

 a little curved, the club jointed, the first joint oval, about half the 

 length of the second; joints 2-.") long oval, the last cone-shajied, one- 

 third longer than the preceding and thinner. Tip of anterior tibiae 

 and tarsi dark honey -yellow. Abdomen oblong-oval, depressed. 



Habitat. — District of Columbia and Virginia. 



Types in Coll. Ashmead an«l *!i^ational Museum. 



Many specimens. The peculiar shape of the abdomen and the cari- 

 nated scutellum readily distinguish the species. 



7 Leptacis breviventris, 8p. uov. ~ 



i 9 . Length, 0.6.5 to 0.80""". Black, shining, impunctured; the face 

 very slightly shagreened just above the insertion of the antennae; lat- 

 21899— iS^o. 45 18 



