NOKTH AMERICAN HYMENOPTERA. 335 



not a particle of reseinblauce to T. metaUicm Ashin. described from 

 Kansas, wliich is metallic-green with a decided punctuation, the 

 present species being nearly smooth. 



Subfamily Pteromalin.i-:. 



Tribe Cleomjmini. 



PL,ATY€;KKKHUS Thomson. 



Plal.vgorrlnis? »iColyti sp. n. 



9 . — Leijfjtb 1.5 nun. Blue-green, scaly punctate; scape and legs, except coxae' 

 light brown, the fenjora dusky, tlie tarsi whitish; flagelluni browu. Head sub- 

 quadcate, much wider than the thorax, about twice as wide as thick autero- 

 posteriorly ; scape rather long, reaching slightly beyond the ocelli ; pedicel two- 

 thirds the length of first funicular joint; flagellum subclavate, twice the length 

 of the scape, the joints longer than thick. Thorax with the prouotum very 

 short, visible from above only at the lateral margins or corners; mesonotum 

 about as loug as wide, with the parapsidal furrows indicated only anteriorly ; 

 scutellum convex, longer than wide; nietanotum very short, smooth, impunc- 

 tate. Wings hyaline, pubescent, the marginal vein very slender, only one and 

 a quarter times as long as the stigmal, the latter long, slightly curved and ending 

 in a stigma, the postmarginal a little longer than the stigmal. Abdomen sessile, 

 coriic-ovate, about as loug as the head and thorax united, depressed above, boat- 

 shaped beneath, seueous-black. 



Hub. — Morgantown, W. Va. Bred by Prof. A. D. Hopkins from 

 Scoli/ttis Tucjulosus living in apple. 



Tribe Sphegigasterini. 



PA K AC. 4 KOTOW US gen. nov. 



Head very large, shaped as in Caratovms Dalm., only the frontal 

 horns are absent, the cheeks very broad, distinctly margined. An- 

 tennte 13-jointed, the flagellum iiliform, the pedicel very small, the 

 ring-joints 2, the funicular joints longer than wide. Thorax not 

 quite as wide as the head, the ])ronotuni short, transverse, distinct, 

 and fully as wide as the mesonotum, the parapsidal furrows entire, 

 but delicate ; scutellum convex, not quite as long as the mesonotuu) ; 

 metanotum declining, with a curved fold or carina on each side of 

 the middle, converging and extending to the petiole ; spiracles ob- 

 long; wings with the marginal vein fully three times as long as the 

 stigmal, the postmarginal long. Abdomen elongate, subcompressed, 

 with a very long petiole, the petiole twice the length of the hind 

 coxie ; body of abdomen emarginate abt)ve at base, the first three 



TR.'VNS AM. KNT SOC. XXI. SEPTEMBER, 1894. 



