44 THE CANADIAN ENTOMOLOGIST. 



]nincturcs, margin of clypeus smooth, convex. Mandibles tridentate, 

 lower tooth rounded. 



Thoracic dorsum finely reticulate, bluish-green, metallic, parapsidal 

 furrows impressed, the median portion of the mesonotum extending further 

 back than the lateral piece, and broadly rounded behind, scutellum 

 rounded in front, widely separating the axillae, margined and evenly 

 rounded behind, the transverse stria distinct; axillae prominent, acute 

 mesally and rounded in front. Thoracic pleura delicately sculptured 

 except metepisternum and the sclerites behind it. Propodium short, 

 transverse, nearly smooth, very finely rugulose longitudinally. Spiracles 

 oblique, elliptical. 



Scape and pedicel of antennre metallic, scape finely shingled, funicle 

 dark brown, clothed with short but stout hairs, scape rather short, slender, 

 pedicel obconic, about as long as first joint of funicle, succeeding joints 

 subequal, gradually wider, club obtusely rounded, white longitudinal 

 ridges on funicle joints, with their bases in one row, and all extend to tip 

 of segment. 



Legs metallic-green ; knees, tip of tibias and tarsi dull, whitish- 

 yellow, last tarsal joint somewhat dusky ; posterior coxae irregularly 

 reticulate. Wings hyaline, stigmal vein shorter than diameter of club, the 

 four sensoria arranged in a curved line, concave behind. 



Abdomen seen from above conic-oval, bluish-green, metallic, second 

 dorsal segment smooth, posterior segments with a hexagonal pavement- 

 like sculpture, posterior margin biconvex, very deeply incised at middle, 

 segment 5 longer than 3 and 4 together, posterior margin of 3 deeply 

 incised, 4 and 5 less deeply, 6 truncate behind. Cerci bearing several 

 long, stiff hairs. Ovipositor dark brown, tip lighter. 



Male. — Length, 1.2 mm.; abdomen, .8 mm. Resembles the female 

 very closely in colour. The antennjie are somewhat stouter. Posterior 

 margin of abdominal segments not so deeply incised as in female. 



Described from numerous specimens reared from timothy grass and 

 orchard grass. Parasitic on an Isosoma and another Chalcid as yet 

 undetermined. 



Ithaca, Amsterdam, Lake Keuka, Oneonla, Kingston, Cranberry 

 Creek, Remsen, Elmira, Lowville, Bluff Point, Cortland, and Victor, N, 

 y. Types in Cornell University collection. 



