Proceedings of 

 the United States 

 National Museum 



SMITHSONIAN INSTITUTION . WASHINGTON, D.C. 



Volume 124 1968 Number 3639 



Studies in Pteromalidae 



in the U.S. National Museum 



(Hymenoptera) 



By Karl-Johan Hedqvist ! 



Genus Epis tenia West wood 



Species of the genus Epistenia Westwood are comparatively large, 

 stout chalcid flies characterized as follows: Coarsely punctured. 

 Head large, broader than thorax, with deep antennal grooves that 

 converge and meet in front of median ocellus. Eyes large, hairy. 

 Antennae inserted near base of clypeus, with 11 segments (formula, 

 11171), the type-species, E. coeruleata Westwood, has first fourth 

 funicle segments longer than wide. Clava and seventh funicle segment 

 with micropilosity (in E. coeruleata also apex of sixth). Clypeus 

 slightly sinuated. Labrum free. Each mandible with three teeth. 

 Ocelli in isosceles triangle. Pronotum produced anteriorly into a 

 short neck, the neck with a median carina. Mesonotum with notaulices 

 complete. Scutellum large, convex, and prolonged slightly over meta- 

 thorax and propodeum. Apex of scutellum nipple-like. Prepectus large, 

 punctate. Propodeum short with a median carina and an incomplete 

 plica. Spiracles large. Gaster longer than head plus thorax, sessile, 

 first segment smooth, second segment not visible dorsally. Apex of 

 gaster more or less tubelike, elongated, with a delicate median carina. 

 Legs stout, all femora swollen, anterior one stoutest, with a tooth 

 distally on the ventral side. Hind tibia with two spurs (in one species, 

 E. odyneri Ashmead, also with long bristles on the hind tibia.) Fore- 



1 Royal College of Entomology, Stockholm 50, Sweden. 



1 

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