220 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



scutellum granular; mesepisternum more finely granular than the 

 scutum; basal area about twice as wide anteriorly as posteriorly; the 

 areola much reduced; the basal lateral areas and median lateral 

 areas not separated; first tergite opaque, finely granular, the granula- 

 tion becoming sparser posteriorly without median carinae ; the second 

 tergite uniformly finely granular, almost as long as the third and 

 following tergites ; third tergite finely granular basally, apically more 

 sliining; the fourth tergite finely granular basally, apically almost 

 impunctate ; body clothed with long, white hair. Black ; face below 

 the upper margin of the antennal sockets, mandibles except piceous 

 apices, the lower portion of the posterior orbits, scape and pedicel 

 beneath, small spot on the basal angles of the pronotum, tegulae, 

 proepisternum, coxae and trochanters, white; legs fulvous; the 

 anterior tibiae and tarsi pallid; apex of the posterior femora the 

 posterior tibiae beneath, and at the apex of the posterior tarsi beyond 

 the middle of the first joint, black; except where mentioned, the 

 posterior tibiae and tarsi white; wings hyaline, iridescent; venation 

 dark brown. 



Falls Church, Virginia. Described from one male recorded under 

 Bureau of Entomology No. Hopk. U. S. 11329&^ which refers to a note 

 stating that this species is a primary parasite of Pteronidea corylus 

 (Cresson). Material collected and reared May 9, 1913, by William 

 Middleton. Associated with this as a parasite of Pteronidea corylus 

 was Polyterus olympiae Ashmead. 



Type.— Cat. No. 18525, U.S.N.M. 



Genus GNESIA Forster. 



No species has yet been placed in this genus. The following new 

 species goes to Gnesia very satisfactorily in Forster's, Davis's, and 

 Ashmead' s tables of the genera. It is therefore included and is to be 

 considered as the type. 



GNESIA CALIROAE, new species. 



Female. — Length 4.5 mm. Anterior margin of the clypeus truncate, 

 the dorsal margin gently convex, the surface shining; the head finely 

 opaque; the area below the antennae with a few rather well defined 

 punctures ; the area above the antennae and the posterior orbits with 

 only granulation, median tubercle short, poorly defijied; ocellocular 

 line subequal in length with the interocular line; orbit completely 

 margined; third and fourth antennal joints subequal; mesonotum 

 opaque, surface granular with a number of well defined separate 

 punctures which are larger anteriorly; notauli deeply impressed but 

 not complete; suture between the scutum and scutellum with two 

 obscure longitudinal carinae; scutellum convex with carinae shining; 

 propodeum completely areolated; the basal area one and one-third 



