326 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



twice as long as tliick, siibpedicellate. Thorax long-ovoid, smootli, 

 shining, tlie fnrrows distinct; scntelhnn smooth, shining, convexly 

 high; metaplenra bare; tegnliii black. Wings hyaline, nearly bare or 

 bnt slightly pubescent. Legs brown-black, the tarsi paler, all the 

 coxa> distinctly black. Abdomen oblong-oval, nearly twice as wide as 

 the thorax, the petiole rugose, subpubcscent. 



Habitat. — Richfield Springs, N. Y. 



Type in National Museum. 



Described from 1 S specimen, reared February 9, 1887, from an 

 Aphis on Ghenoimdium album. The broad abdomen and the length of 

 the club Joints readily distinguish the species. The Aphis from which 

 this species was bred was undoubtedly infested with Cecidomyious 

 parasites, upon which the Platygasterid is a secondary parasite. 



Platygaster gracilis Ashui. 

 Can. Ent., xix, p. 132; Cress. Syn. Hyni., p. 250. 



S. Length, 1.5'""'. Black, shining; the head posteriorly micro- 

 scopically punctulate; face smooth, highly polished, with a slight cen- 

 tral impressed line from the middle ocellus. Antemnx' 10-jointed, black ; 

 pedicel long, yellowish at extreme tip; first funiclar joint small, second 

 somewhat swollen, slightly curved and shorter than the first club 

 joint; club G-jointed, cylindrical, the joints twice as hmg as tliick. 

 Thorax long-ovoid, smooth, shining, the furrows very distinct; meta- 

 ])leura sericeous; teguhp black. Wings long, hyaline, pubescent. 

 Legs rust-brown, the anterior pair more yellowish, the middle and pos- 

 terior femora and tibi;e dusky toward tips; all cox;e Idack. Abdoiuen 

 oblong-oval, narrowed toward base, as long as the thorax, the i)etiole 

 more or less pubescent. 



Habitat. — Jacksonville, Fla. 



Type in Coll. Ashmead. 



Platygaster aciculatus, sp. nov. 



S . Length, 1.4 '". Black, shining; vertex, occiput, and cheeks finely 

 shagreened; face transversely aciculated; sides of prothorax, mesono- 

 tum, mesopleura beneath the wings and the meta])leura all distinctly 

 longitudinally aciculated; the parapsides, scutellum, and the lower por- 

 tion of mesopleura smooth, ixtlished. Antennjie lO-jointcd, rufo-piceous; 

 the flagellum subclavate; pedicel longer and stouter than the first and 

 second funiclar joints together, the latter scarcely longer than thick, 

 the foHowing joints to the last transverse, the last short, conic. Par- 

 apsidal furrows deep, distinct. Scntellum elevated, cushion-shaped. 

 Legs rufo-piceous; tips of anterior femora and their tibioe and the 

 articulations of tlic middle legs yellowish. Wings clear hyaline, en- 

 tirely devoid of i)ubescence. Abdomen oval, smooth, polished, the 



