260 PROCEEDINGS OF THE NATIONAL MUSEUM vol.88 



equal size, right mandible with acute dorsal tooth and two rounded 

 ventral ones. 



Prepectus narrow, bladelike, apex reaching tegula; mesotibial spur 

 large; ventral half of outer surface of metafemur provided with 

 dense, short pubescence, outer ventral margin with 13 to 16 teeth 

 (fig. 11, ^'), basal one and usually fifth to tenth larger than others; 

 distinct inner tooth present; apex of metatibia narrow, acute; apex 

 of posterior tarsus with four long spines, claw small, basal enlarge- 

 ment without teeth, but with several long setae. 



Propodeum with two parallel, longitudinal mesal carinae, baso- 

 lateral areas glabrous or almost so, spiracular openings vertical; 

 petiole three times as long as wide, two-thirds length of metacoxa, 

 surface almost glabrous, lateral carinae usually absent, occasionally 

 present near base, a sparse row of long setae present on either lateral 

 margin; gaster usually slightly longer than metafemur; cerci oval, 

 located near posterior margin of epipygium, a smooth area sur- 

 rounds each cercus; apex of ovipositor sheath bluntly pointed, pro- 

 vided with a tuft of short setae; hypopygium exserted, apex not 

 isolated from eighth tergite (fig. 13, /) . 



Male: 3.5-4.5 mm. Antennal scape relatively narrow (fig. 8, g) ; 

 protarsal claw with many small basal teeth (fig. 11, /) ; mesotibial 

 spur usually small; metafemur with a small inner tooth; ninth 

 sternite acutely bidentate at apex (fig. 14, g). 



Type locality. — Pennsylvania. 



Types. — Cresson redescribed the male of this species in 1872, but 

 the specimens at present in the Academy of Natural Sciences of 

 Philadelphia labeled "/S'm^cr« Tnicro gaster''' are evidently not the 

 ones he had, as they do not agree with his description, and are fe- 

 males. Provancher described the female in 1887; I have not seen 

 his specimens. 



Host. — Unknown. 



Distribution. — ^Illinois, Minnesota, Oklahoma, Ohio, Ontario, Penn- 

 sylvania, Texas, Wisconsin. 



Genus METADONTIA Ashmead 



Metadontia Ashmead, Ent. Amer., vol. 4, p. 87, 1888. — Dalla Toree, Catalogus 

 hymenopterorum, vol. 5, p. 394, 1898. — Ashmead, Mem. Carnegie Mus., vol. 

 1, p. 252, 1904. — ScHMiEDEKNECHT, Genera insectorum, fasc. 97, p. 32, 1909. — 

 Gahan and Fagan, U. S. Nat. Mus. Bull. 124, p. 87, 1923. (Genotype, 

 Chalcis amoena Say [= Smicra montana Ashmead].) 



Plagiosmicra Camekon, Invert. Pacifica, vol. 1, p. 56, 1904. — Schmiedeknecht, 

 Genera insectorum, fasc. 97, p. 31, 1909. — Gahan and Fagan, U. S. Nat. 

 Mus. Bull. 124, p. 115, 1923. 



Description. — Antennae inserted considerably ventrad of center of 

 frons but dorsad of ventral margins of compound eyes; segments of 



