1865.] 



67 



cous above, the base beneath yellowish. Thorax minutely sculptured, 

 piceous, more or less varied with testaceous, especially on the sides ; 

 scutellum piceous, triangular, with the excavation in front and the space 

 on each side, striated ; metathorax pale piceous, minutely sculptured, 

 with a central longitudinal carina, and another on each lateral margin ; 

 tegulae yellowish-white. Wings ample, hyaline, iridescent ; nervures 

 and stigma pale fuscous, the latter large and subtriangular ; marginal 

 cell wanting ; one large irregular submarginal cell ; areolet incomplete ; 

 one large triangular discoidal cell. Legs, including the coxae, eutirely 

 yellow; tips of the posterior femora, tibiae and tarsi sometimes dusky. 

 Abdomen depressed, rather shining, entirely orange-yellow, not dis- 

 tinctly sculptured ; first segment narrowed at base, depressed, angular 

 and carinated on the lateral margins ; ovipositor short, fuscous. Length 

 1} line; expanse of wings 2V lines. 



Collection. — Ent. Soc. Philad. Seventeen 9 specimens ; % not seen. 



Microgaster marginiventris, n. sp. 



Black; antennae fuscous; palpi, tegulfe, legs, and lateral margins of abdo- 

 men, yellow; wings hyaline, iridescent. 



% 9. — Dull black, slightly pubescent; tips of mandibles and the 

 palpi, yellowish ; antennae nearly as long as the body in 9 , longer in % , 

 fuscous. Thorax dull black, opaque, densely and minutely punctured ; 

 scutellum depressed, triangular, punctured, the excavation in front and 

 the space on each side striated ; metathorax rugose, with a central lon- 

 gitudinal carina and one on each lateral margin ; tegulae pale yellow- 

 ish. Wings hyaline, iridescent, slightly pubescent; nervures and stigma 

 pale testaceous ; no marginal cell ; a large irregular submarginal cell, 

 more oblique than in flavlvoitrls; areolet wanting; a large subtrian- 

 gular discoidal cell, more strongly petiolated from the costal nervure, 

 than in tiaviventrls. Legs, including the coxae, yellow, more or less 

 deep in color, the posterior tarsi dusky. Abdomen depressed, dull black, 

 distinctly and roughly sculptured, the lateral margins and the apex 

 more or less dull yellowish ; venter stained with yellowish ; ovipositor 

 of 9 very short. Length 1\ line; expanse of wings 'Z\ lines. 

 Collection. — Ent. Soc. Philad. Nine 9 , two % specimens. 



Microgaster Finos, n. sp. 



Black; an ten n e fuscous; palpi white; tegulae, legs, except posterior tibiae 

 and tarsi, and middle of abdomen, yellowish ; wings hyaline, iridescent. 



Female. — Head black ; tips of mandibles piceous ; palpi white; an- 

 tennae fuscous. Thorax dull black, densely and finely punctured, slightly 

 pubescent; scutellum triangular, sparsely punctured, the excavation in 

 front striated, the space on each side flat, smooth and polished, mar- 



