THE TRIBE CHALCIDINI — BURKS 311 



1 female. Holotype and allotype deposited in the U. S. National 

 Museum; paratypes deposited in Illinois State Natural History 

 Survey collection. 

 Host. — Gnorhno schema sp. (Lepidoptera, Gelechiidae) . 



SPILOCHALCIS JUXTA (Cresson) 



FiGUEES 7, ^; 9, d 



Smicra juxta Ceesson, Trans. Amer. Ent. Soc, vol. 4, pp. 38, 54, 1872. — Cameron, 

 Biologia Centrali-Americana, Hymenoptera, vol. 1, p. 87, 1884. — Howaed, 

 U. S. Dept. Agr. Bur. Ent. Bull. 5, p. 34, 1885.— Dajlla Torre, Catalogus 

 hymenopterorum, vol. 5, p. 378, 1898. — Schmiedeknecht, Genera insectorum, 

 fasc. 97, p. 35, 1909. — Cbesson, The Cresson types of Hymenoptera, p. 75, 

 19ia 



SpilocJialcis nigropleuralis Ashmead, Mem. Carnegie Mus., vol. 1, p. 436, 1904. — 

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



This compact species is most readily recognized by its rounded 

 head, "which is one-half as long as wide when viewed from the dorsal 

 aspect, the stout antennal flagellum, and the strong lamina projecting 

 cephalad from the interantennal projection (fig. 7, g) . 



Description. — Yellow with black markings; antennal flagellum 

 dark brown, the three apical segments usually red ; occipital area of 

 head, all but lateral margins of mesopraescutum and lobes of meso- 

 scutum, anterior basal areas of axillae, mesal longitudinal stripe of 

 mesoscutellum, apices of metacoxae, small basal, apical, and ventral 

 rectangular marks on outer side of metafemur, most of propodeum, 

 entire petiole, and most of gaster, black. 



Female: 4.5-5 mm. Apex of antennal scape not quite attaining 

 level of ventral margin of anterior ocellus, pedicel four-fifths and 

 ring segment one-fifth length of segment 4, 4 to 10 equal in length, 

 11, 12, and 13 shorter, their combined lengths one-fifth less than 

 length of segments 9 and 10; scrobe cavity deep, edge carinate only 

 at ventral margin; interantennal projection provided with a con- 

 spicuous anterior lamina (fig. 7, g) ; frons with area between scrobe 

 cavity and compound eyes somewhat produced cephalad, surface of 

 frons densely punctured except immediately dorsad of clypeus; 

 frontal tentorial pits usually obscure, located at level of ventral 

 margin of scrobe cavity; malar space one-third height of compound 

 eye; frontogenal suture extending in a low arc from compound eye 

 to mandible, a strong secondary carina extending from point near 

 dorsal articulation of mandible to posterior margin of compound 

 eye; combined widths of compound eyes equal to interocular space 

 at level of antennal bases; left mandible with three nearly equal 

 teeth, right mandible with three teeth, ventral one largest; diameter 

 of posterior ocellus three-fourths width of interocellar space. 



Dorsum of thorax coarsely punctate, spaces between punctures nar- 

 row, minutely reticulated ; pubescence long, generally sparse on meson 



