THE TRIBE CHALCIDINI — ^BUBKS 259 



hypopygium exserted, apex not isolated from eighth tergite (as in 



fig. 13, /) . 



Male : 4.5-5 mm. Antennal scape expanded at base (fig. 8, /) ; 

 protarsal claw with a few teeth on basal enlargement (fig. 11, e) ; 

 metafemur with pubescence on outer surface extremely short, inner 

 tooth lacking or obscurely indicated ; ninth sternite broadly excavated 

 mesad (fig. 14, /). 



Type locality. — Canada. 



Type.— Holotyi^e, female, 1783, Academy of Natural Sciences of 

 Philadelphia. 



Eosts. — Odontomyia vertehrata Say, Odontomyia sp. (Diptera, 

 Stratiomyiidae). 



Distribution.— liA.moi& : 1 male ; Algonquin, July 7-17, 1909, Nason, 

 1 female, 7 males; Havana, June 30, 1897, Hart and Bronson, 3 

 females, July 3, 1894; ex Odontomyia vertelrata^ C A. Hart, 1 male. 

 Michigan : Washtenaw County, June 13-19, 1931, ex Odontomyia sp., 

 K. C. Kuster, 2 females, 1 male. New York: Penn Yan, July 19, 

 1925, Babiy, 1 male. Ontario: Ottawa, 1 female, 1 male. 



CHALCIS MICROGASTER Say 



FiGUBES 8, g; 11, /, i; 13, f; 14, g 



Chalcis microgaster Say, Long's second expedition . . ., vol. 2, p. 326, 1824.— 

 Ceesson, Proc. Eut. Soc. Philadelphia, vol. 1, p. 228, 1862.— Howaed, U. S. 

 Dept. Agr. Bur. Ent. Bull. 5, p. 36, 1885. 



Smicra microgaster (Say) Cresson, Trans. Amer. Ent. Soc, vol. 4, pp. 35, 38, 

 1872 ; Synopsis of the families and genera of the Hymenoptera of America 

 north of Mexico, p. 233, 1887. — Peovancher, Additions et corrections 

 a la faune hymenopterologique . . . Canada, p. 189, 1887.— Smith, Geol. 

 Surv. New Jersey, Catalogue of insects, p. 18, 1890.— Dalla Torre, Catalogus 

 hymenopterorum, vol. 5, p. 379, 1898.— Smith, Ann. Kept. New Jersey State 

 Board Agr., vol. 27, suppl., p. 554, 1900.— Sohmiedeknecht, Genera insec- 

 torum, fasc. 97, p. 35, 1909.— Viereck, Connecticut Geol. and Nat. Hist. Surv. 

 BuU. 22, p. 526, 1916. 



This species is most easily distinguished in the female by the large 

 mesotibial spur, the long, nearly glabrous petiole, and the exserted 

 hypopygium not isolated from the eighth tergite (fig. 13, /) ; the male 

 is readily identified by its relatively slender antennal scape, and the 

 two acutely projecting points on the posterior margin of the ninth 



sternite (fig. 14, p-). 



Description.— Bluck, the anterior and mesolegs variegated with 

 brown, base of metafemur red-brown. 



Female: 4r-5 mm. Antennae inserted in center of frons, scape 

 exceeding level of posterior ocelli by one-fourth its length ; width of 

 malar space slightly less than one-half height of compound eye; 

 frontogenal suture straight, this suture often paralleled ventrally 

 by a rather vague carina; left mandible with two teeth of nearly 



