282 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



last tlie largest, iuteruiediate joints a little longer than thick; tubercle 

 at tip of scutelluni subobsolete; mesonotal furrows complete. 



Habitat. — San Francisco, Cal. 



Ty])es in National Museum. 



Described from $ and $ specimens, reared November, 1885, from 

 a Oecidomyiid gall on Lnpinns athorca, collected by Albert Koebele. 



Polymecus picipes, sp. uov. 



9 . Length, l.S to 2™". Black, shining; head transverse, the vertex 

 posteriorly distinctly shagreened ; face smooth, i)olished, except a few 

 transverse lines just above the insertion of the antennte; legs variable, 

 from a rufo-i)iceous to almost black, the trochanters, tips of anterior 

 tibia", base of middle and posterior til)ia', and all tarsi pale brownish 

 or honey-yellow. AntenujB 10-jointed, brown-black, the first funiclar 

 joint a little longer than thick, the second transverse, the third 

 quadrate, club joints oblong. Mesonotal furrows complete, the middle 

 lobe projecting slightly on the scutellum, the lateral lobes with no 

 tufts of pubescence at base. Collar and mesopleura striated. Scutel- 

 lum highly convex, subopaque, without a tubercle at tip. Metathorax 

 bare or faintly pubescent. Tegulie black. Wings hyaline. 



Abdomen more than twice as long as the thorax, the petiole coarsely 

 striated, the base of second segment with two aciculated foveohc at base. 



Habitat. — District of Columbia. 



Types in Coll. Ashmead. 



Several specimens. 



Polymecus melliscapus, sp. nov. 



9 . Length, 25""". Black, subopaque, very faintly, microscopically 

 shagreened; the head behind and the face transversely aciculated. 

 Scape, pedicel, and legs brownish-yellow; flagellum black; pedicel 

 about as long as the first and second funiclar joints united ; joints 3, 4, and 

 5 of club not longer than wide at apex, the last conical, scarcely twice 

 as long as the x)enultimate. Metathorax and petiole, above and below, 

 densely pubescent. Tegu-la^ black. Wings hyaline, pubescent. Abdo- 

 men twice the length of the head and thorax united, the third segment 

 one-third the length of the fourtli, the fiftli and sixth equal in length, 

 a little longer than the fourth, the sixth being conical. 



Habitat. — Washington, D. C. 



Type in Coll. Ashmead. 



Described from a single specimen collected l)y ^Ir. E. A. Schwarz. 



Polymecus compressiveutris, sj). nov. 



9. Length, 2,6""". rolished, black, impunctured; the antenna^ and 

 legs golden-yellow, the llageinim very slightly obfuscated at tip. The 

 pedicel is oval, not quite as long as tlie first and second funiclar joints 

 united; first funichir joint narrowed, but twice as long as thick; the 



