1865.] 299 



four posterior femora, and their tibiae, except a pale annulus on the 

 posterior pair, black or blackish. Abdomen nearly sessile, of almost 

 equal breadth to near the tip which is slightly incurved and pointed ; 

 dorsal surface subdepressed, smooth and polished, except the basal seg- 

 ment which is minutely aciculate ; incisure between the first and second 

 segments with a deep fovea on each side ; fourth and following seg- 

 ments black, highly polished; venter paler. Length 3 lines; expanse 

 of wings 5 2 lines. 

 ( hie specimen. 



4. Microdus 1 longipalpus. n. sp. 



Black: legs and abdomen above except base and apex, orange-yellow; wings 

 fuliginous; maxillary palpi more than half tbe length of the body: ovipositor 

 one-fourth longer than the body. 



Female. — Slender, black, polished; face a little prolonged, truncate 

 at tip ; maxillary palpi longer than the head and thorax, very slender. 

 testaceous, two basal joints, extreme tips of the third and fourth and 

 the terminal joint entirely blackish, basal joint short, second joint four 

 times as long as the first, third one-fourth longer than the second, 

 fourth joint about as long as the second, terminal joint very slender, 

 about half the length of the fourth; labial palpi very slender, about 

 one-third the length of the maxillary palpi, blackish ; antennae as long 

 as the bocly, slender, eutirely black. Thorax polished, with the dorsal 

 lines not well-defined ; metathorax subopaque, finely rugulose. with two 

 well-defined, central, longitudinal carinae; tegulas black. Wings nar- 

 row, uniform fuliginous, slightly iridescent; nervures and stigma black ; 

 areolet minute, triangular and subpetiolated. Legs, long and slender, 

 and, including the coxas, orange-yellow ; tips of the four posterior tibiae 

 and their tarsi entirely, blackish. Abdomen elongate, broadly subcom- 

 pressed and obliquely truncate at tip, smooth and polished; black, 

 with the apex of the first and the second and third segments entirely, 

 orange-yellow; first segment excavated at base, finely rugose ; venter 

 dusky, the ventral valve prominent, projecting and tinged with testa- 

 ceous ; ovipositor one-fourth longer than the body, orange-yellow, valves 

 blackish. Length 2] lines; expanse of wings 4 2 lines. 



One specimen. 



Genus BEACON. Fabr. 

 1. Bracon montivagus. n. sp. 



Black, polished; disk of thorax more or less, and the abdomen entirely, ru- 

 fous ; wings blackish, ovipositor longer than the body. 



Female. — Black, highly polished; face pubescent, the orbits and 

 mouth sometimes tinged with rufo-piceous ; antennae nearly as long as 



