52 



Cincinnati Society of Natural History. 



first joint the longest, the others to the sixth subequal, all a 

 little longer than thick, the sixth quadrate. Thorax above 

 flattened, the pronotum transverse-quadrate, as in Eurytoma, 

 the mesothoracie furrows distinct only anteriorly ; seutellum 

 rather large, with the axillae large, triangular and approaching 

 more nearly together than in any other genus in this tribe, 

 in this' respect more like some of the Kncyrtids; meta- 

 thorax, long, with a delicate central carina; wings hyaline, 

 iridescent, the nervures brownish, the marginal and post- 

 marginal veins about equal, the stigmal vein being scarcely 

 two-thirds the length of the marginal and sub-clavate. Abdo- 

 men distinctly petiolated, clavate, the body, as viewed 

 from above, somewhat triangular; the petiole is stout, finely 

 rugose, and a little longer than the hind coxae, the rest of the 

 abdomen smooth, shining, the second segment very long, 

 occupying most of its surface, with a deep sulcus at base. 



Male — Length, 2.2 mm. Agrees with the female, except it is 

 more decidedly metallic-green, with all the tibiae banded with 

 brown, the antennae filiform with the joints less compact, 

 w r hile the body of the abdomen is ovate. 



Hab. — Wooster, Ohio. 



Bred by Prof. F. M. Webster, from Dipterous larvae. 



Tribe Pteromalini. 

 Polyscelis Thomson. 



(11) Polyscelis Websteri, sp. n. Female — Length, 2.5 

 mm. Head and thorax bronzed green, closely punctate; pres- 

 ternum bluish; abdomen pointed-ovate, aeneous; antennae 

 13-jointed, the scape pale-yellowish, the pedicel and flagellum 

 dark-brown ; legs, except hind coxae, yellowish. 



Head transverse, full}- three times as w 7 ide (or a little more) 

 as thick antero-posteriorly ; eyes ovate ; clypeus aciculated ; 

 mandibles rufo-piceous, the right four-, the left three-dentate, 

 the inner tooth blunt; antennae 13-jointed, the flagellum sub- 

 clavate, about twice as long as the scape, the first funiclar joint, 

 including the two ring-joints, a little longer than the pedicel, 

 the following joints very slightly and gradually shortening, 



