PARASITIC HYMENOPTERA. 223 



Dei^criln"! from m:uiy specinien.s. Dr. Win. A. Nasoii has col- 

 lected many specimens of this interesting^: species at Al<,n)n(jnin, and 

 the U. S. National Museum has a sin(,de specimen labeled from Prof. 

 F. ]\r. Webster, bred from />V>//.s ercetalui Grote. 



.VETROXYS Wcstwood. 



AetroxyM CHllidii s]). n. 



9 . — Lt'iifitli 8.5 mm. Head and tliorax lilue-black, above bronze-green, clo.sely 

 punctate and clothed with spai-se white hairs. Abdomen feneous l)lack : scajie 

 and legs, except coxa; and femora, brownish yellow, the femora metallic bi'own. 

 Head transverse, wider than the thorax, not quite three and a half times as wide 

 as thick antero-posteriorly ; viewed from in front across the eyes it is wider than 

 long, the cheeks rounded, the face below antennae subconvex; pronotum dilated 

 at sides, narrowed medially, the superior anterior margin acute; mesonotum a 

 little wider than long: axillse as wide from each other as their width at base; 

 metanotum short, hardly half as long as the scutellum, the median carina sub- 

 obsolete, the lateral folds complete, the spiracles subreniform. Wings hyaline, 

 the veins pale yellowish, the marginal vein nearly twice as long as the stign»al, 

 the ]>ostniarginal about two-thirds as long as the marginal. Abdomen long, conic- 

 ovate, twice as long as the thorax, above concave, beneath convex, segments 4, 5 

 and 6 long, the apical margin of fourth roundedly sinuated inwardly. 



Hab. — Virginia Beach, Va. 



Described from two 9 specimens, bred July 17, 1894, by Mr. E. 

 A. Schwarz, from the larva of CaUidlum antennatum. 

 PL.ATYTEK.n.4 Walker. • 



Platyternia eitripes sp. n. 



9- — Length 2.") mm. Metallic bluisli green; scape, i>edicel beneath and legs, 

 except coxae, lemon-yellow ; pedicel and tlagellum above brown, the latter beneath 

 yellowish; palpi yellow. Head and thorax closely punctate, the head a little 

 more than twice as wide as thick antero-posteriorly, viewed from in front about 

 one-half wider than long; ocelli red : mandibles pale with black teeth; antennse 

 inserted below the middle of the face, 13-jointed, with three minute ring-joints, 

 the tlagellum clavate, twice as long as the scape, the pedicel obconical, a little 

 longer than the first joint of funicle; funicle 5-jointed, the joints gradually 

 widening toward club, all wider than long, the club incrassated, oblong. Thorax 

 about two and a half times as long as wide, the parapsidal furrows indicated only 

 anteriorly, the metathorax almost smooth, but with complete lateral folds. Wings 

 hyaline, the teguhe and veins brownish yellow, the marginal vein about twice as 

 long as the stigmal. .\bdomen viewed from above conic-ovate, the dorsum fiat, 

 beneath compressed, carinated, and with an exceedingly delicate microscopic 

 sculi)ture. 



Hal,.— West Cliff, Colo. 



Described from two 9 specimens received some years ago from 

 r. D. A. Cockerell. 



I'latyteriiiit f'ii<«4*i|>OK sp. n. 



9. — Length 2..') mm. Stature similar to /'. cifripex. but alu)ost entirely blue, 

 with only a faint greenish tinge in certain lights ; the scape rufous ; the flagelluni, 



TKANS. \-\I. KNT. SOe. XXIII. .JUXE. 1S96. 



