PROCEEDINGS OF THE 



ENTOMOLOGICAL SOCIETY OF WASHINGTON 



VOL. 22 APRIL, 1920 No. 4 



SOME NEW PARASITES, WITH REMARKS ON THE GENUS PLATY- 



GASTER (HYMEN OPTERA). 



BY R. M. FOUTS. 



This paper contains descriptions of eight new species of Hymen- 

 optera, from the United States, belonging to the superfamilies 

 Serphidoidea and Mutilloidea. With the exception of a few 

 paratypes, retained by the author, all of the type material is in 

 the collection of the United States National Museum at Wash- 

 ington, D. C. 



Superfamily SERPHIDOIDEA. 



Family Diapriidae. 

 Trichopria parked, new species. 



Differs from flavipes Ashmead, to which it is most closely allied 

 in having the antennal club 5- jointed instead of 4- jointed. 



Female. Length 1.5 mm. Body slender; head globose, broad and strongly 

 convex behind the eyes, smooth and shining; length of head below slightly 

 greater than the length above; antennae clavate; pedicel as long as but con- 

 siderably larger than the third joint; fourth, fifth and sixth joints subequal 

 in length and width, the seventh a little wider than any one of these but no 

 longer; club 5-jointed, the first joint globose, slightly longer than wide, second 

 considerably larger and slightly longer than the first, third larger and slightly 

 longer than the second, fourth a little longer and wider than the third, very 

 little shorter than the fifth which is conical and narrower than the fourth; 

 thorax as long as the abdomen, shining and impunctate; prothorax woolly; 

 mesonotum without furrows, separated from the axillae which meet on the 

 median line, by a fine suture; scutellum transverse-quadrate, non-carinated, 

 feebly convex, with a small and shallow fovea at its base; propodeum as long 

 as the scutellum, covered with silvery hairs and with a conical or tooth-like 

 prominence basally; wings brownish, extending beyond the apex of the 

 abdomen, margined with long cilia; subcostal nervure extending one-fourth 

 the length of the wing from the base to the apex, reaching the costal margin 

 and terminating in a small, triangular stigma; legs stout, hairy; femora and 

 tibiae strongly clavate, the latter curved and narrowed proximally; abdomen 

 oval, pointed at the apex, shining and impunctate; petiole longer than wide, 

 distinctly longer than the propodeum, densely covered with long silvery 



61 



