ART. 15». REVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 123 



joints seven to nine subequal, cylindrical, one and one-half times as long 

 as wide, ten twice as long as wide, pointed apically, as wide as nine; 

 thoracic ratio: Length 20, width 12, height 14; thorax convex above, 

 entirely polished and without sculpture; notauli short, nearly parallel; 

 scutellum (not counting the spine) transverse, ridgelike, rather thickly 

 pubescent, its posterior face perpendicular; spine long and thin, rodlike, 

 extending straight backwards as far as the apex of the propodeum; 

 abdomen as long as the thorax, elliptical behind the first segment, 

 twice as long as wide, as wide as the thorax, highly polished; second 

 tergite longer than wide, strongly narrowed anteriorly ; following seg- 

 ments short, transverse; wings brownish, pubescent, with long mar- 

 ginal cilia, as long as the head, thorax, and abdomen united. Shining 

 black; antennae yellow, the last four joints brown; legs mostly reddish- 

 yellow, the hind femora and tibiae apically fuscous; spine of scutellum, 

 propodeum and first abdominal segment, yellowish. 



Type locality. — Jacksonville, Florida. 



7^/pe.— Cat. No. 25470, U.S.N.M. 



Other locality. — Carlisle, Pennsylvania. 



Redcscribed from the type and from a male specimen collected by 

 the author at Carlisle (July 2, 1918). 



9. LEPTACIS GAHANI, new species, 



Plate 1, figs. 7, 8. 



Female. — Length 1.20 mm. Closely related to americana from 

 which it differs only in the slightly narrower abdomen. I have vainly 

 sought further differences. Perhaps the males would be more 

 useful in this connection but unfortunately I have no males of 

 americana. The figure illustrating the antennae of the female type 

 is equally applicable to americana. 



Male. — Length 1 .20 mm. Differs little from the female. Antennae 

 long and slender, with nodes between joints seven to ten; flagellum 

 covered with erect wliitish hairs about two and one-half times as long 

 As the joints are wide; abdomen about as long as the thorax, spatulate, 

 two-thirds as wide as long. 



Type locality. — Glen Echo, Maryland. 



Type.— Cat. No. 25456, U.S.N.M. Three paratypes in the author's 

 collection 



Described from seven specimens, one female and six males, collected 

 by the author, July 15, 1919, on the leaves of Cercis canadensis 

 Linnaeus. 



This species is named after my friend, A. B. Gahan, a recognized 

 authority on Parasitic Hymenoptera. 



