DESCKIPTIONS OF SOME NEW PAKASITIC HYMEXOP- 



TERA. 



By A. B. Gahan, 



Of the Bureau of Entomology, United States Deportment of Agriculture. 



This paper contains descriptions of 1 genus and 14 species of Ich- 

 neiimonoidea, 1 genus and 11 species of Chalcidoidea and 1 species 

 of Proctotrvpoidea believed to be new to science. Each species is 

 described fi^m reared material and is thus connected with a dehnite. 

 host record. 



Superfamily ICHNEUMONOIDEA. 

 Family BRACONIDAE. 

 Subfamily Aphidiinae. 



EPHEDRUS NITIDUS, new species. 



Female.— Length 2 mm. Head impunctate, narrowed behind the 

 eyes; antennae apparently ten-jointed, the apical joint, however, twice 

 as long as the preceding and partially divided into two joints; meso- 

 scutum polished, the parapsidal grooves nearly complete and termi- 

 nating posteriorlv in a dimple-like impression before the scutellar 

 suture: pleura polished; propodeum distinctly areolated, shining, 

 with the posterior face appearing more or less rugulose; wmgs hya- 

 line, the second radial abscissa distinctly shorter than the first mter- 

 cubitus; abdomen rather robust, a little longer than the head and 

 thorax, polished except the first tergite which is rugulose and about 

 one and one-half times as long as broad at apex. Head, thorax, and 

 abdomen black; mandibles, palpi, and antennae, including scape, 

 black or brownish black; coxae black, rest of the legs brownish testa- 

 ceous to almost black in some specimens; stigma and nervures 

 brownish testaceous. 



This species differs from all others known to me in the short second 

 radial abscissa, the more distinct parapsidal grooves, and the dimple- 

 like impression on the mesoscutum. 



Type-locality. Says Brunswick. Xew Jersey. 



2'yp^._Cat. No. 203T3, U.S.N.M. 



Host. — Aphis hrassieae. 



Seven female specimens received from C. H. Richardson, and said 

 to have been attacking Aphh hrassieae in a greenhouse. ^ 



Proceedings U. S. National Museum. Vol. 53-No. 2197. 



195 



