304 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 88 



of insects, p. 38, 1890. — Howaed, Proc. Ent. Soc. Washington, vol. 1, p. 11, 

 1895. — Smith, Ann. Rept. New Jersey State Board Agr., vol. 27, suppl., p. 

 554, 1900.— GiKAULT, Ent. News, vol. 25, p. 283, 1914. 



Spilochalcin mariae (Riley) Howard, U. S. Dept. Agr. Bur. Ent. Bull. 5, pp. 6, 

 35, 1885. — Dat.t.a Toeke, Catalogus hymenopterorum, vol. 5, p. 285, 1898. — 

 ViERECK, Trans. Amer. Ent. Soc, vol. 32, p. 184, 1906. — Howard and Chitten- 

 den, U. S. Dept. Agr. Circ. 97, p. 7, 1908. — Schmiedeknecht, Genera in- 

 sectorum, fasc. 97, p. 40, 1909. — Smith, Ann. Rept. New Jersey State Mus. for 

 1909, p. 649, 1910.— Vieeeok, Connecticut Geol. and Nat. Hist. Surv. Bull. 22, 

 p. 527, 1916. — Howard and Chittenden, U. S. Dept. Agr. Farmers' Bull. 701, 

 p. 7, 1916.— RuHL, Soc. Ent. Stuttgart, vol. 36, p. 11, 1921.— Baeeg, Ontario 

 Dept. Agr. Bull. 224, p. 8, 1928.— Isely, Arkansas Agr. Exp. Stat. Bull. 203, p. 32, 

 1926.— Leonard, Cornell Univ. Agr. Exp. Stat. Mem. 101, p. 976, 1928.— 

 Johnson, Nantucket Maria Mitchell Assoc. Publ. 3, p. 109, 1930. — Mont- 

 G0MB21Y, Can. Ent., vol. 65, p. 185, 1933. — Schaffnee and Griswold, U. S. 

 Dept. Agr. Misc. Publ. 188, p. 152, 1934. 



Spilochalcis trinidadensis Ashmead, Mem. Carnegie Mus., vol. 1, p. 437, 1904. — 

 Schmiedeknecht, Genera inseetorum, fasc. 97, p. 41, 1909. 



Spilochalcis insularis Ashmead, Mem. Carnegie Mus., vol. 1, p. 437, 1904. — 

 Schmiedeknecht, Genera inseetorum, fasc. 97, p. 40, 1909. 



The male of this species differs from all other North American 

 species in the genus in having the antenna! pedicel triangular in- 

 stead of cylindrical (see fig. 9, u) ; the female is most easily recog- 

 nized by the quite constant color pattern of the dorsum of the thorax, 

 the short, stout petiole, with distinct lateral carinae, and the meta- 

 f emora being without an inner tooth. 



Description. — Yellow or red with black markings; flagellum of 

 antennae, occiput, mesal spot on anterior surface of pronotum, an- 

 terior and posterior margins and longitudinal mesal stripe of meso- 

 praescutum, parapsidal furrows, longitudinal mark on each lobe of 

 mesoscutum, posterolateral angles of axillae, longitudinal mesal 

 stripe of mesoscutellum, variable dorsal stripe or spot and apex of 

 metacoxae, metatrochanters usually, teeth of metafemur, variable 

 basal spot of propodeum, usually narrow transverse dorsal stripes 

 on gaster, and apex of ovipositor sheaths, black; male almost always 

 with both a dorsal and ventral black stripe on metacoxae. 



Female: 4.5-10 mm. Apex of antennal scape exceeding, by one- 

 fourth its length, level of posterior ocelli, scape and ring segment 

 usually equal in length, their combined lengths equal to segment 4, 

 segments 4 to 7 usually equal, 7 sometimes slightly shorter, 8 and 9 

 always shorter than 7, 10 variable in length, usually slightly shorter 

 than 9, last three segments indistinctly divided, their combined 

 lengths usually equal to segment 4; scrobe cavity shallow, edge cari- 

 nate at ventral margin and on ventral one-half of lateral margins, 

 the latter strongly curved mesad; interantennal projection with a 

 slight anterior carina; frons with a few scattered, indistinct punc- 

 tures, oblique carinae radiating from ventral and lateral margins 

 of anterior ocellus, usually three transverse carinae present in scrobe 



