THE TRIBE CHALCIDINI — BURKS 309 



15. Anterior dorsal margin of pronotum with a transverse carina 



(fig. 10, c) melana (p. 316) 



Anterior dorsal margin of pronotum acarinate 16 



16. Width of space between posterior ocellus and margin of com- 



pound eye one-third diameter of posterior ocellus odontotae (p. 321) 



Width of space between posterior ocellus and margin of com- 

 pound eye equal to or slightly greater than diameter of pos- 

 terior ocellus 17 



17. Frontal tentorial pits located near bases of antennae ; dorsum of 



thorax black with yellow spots subobsoleta (p. 323) 



Frontal tentorial pits located midway between antennal bases 

 and anterior margins of compound eyes ; dorsum of thorax 

 entirely black pallipes (p. 325) 



SPILOCHALCIS TANAIS, new species 

 FiGUBES 9, c; 10, 6 



In having the antennal scape short, the flagellum stout, and the 

 vertex broadly rounded, this species agrees with S. subobsoleta (Cres- 

 son) but differs in having the scrobe cavity shallow, the body elongate 

 rather than compact, the abdomen of the female acuminate instead 

 of semiglobose, the mesopraescutum as long as wide at the widest 

 point (fig. 10, 5), not wider than long (fig. 10, c), and the metafemora 

 rather narrow instead of semiglobose. 



Description. — Yellow with variable brown and black markings. 

 The following areas usually brown: Apices of mandibles, areas of 

 frons just cephalad of ocelli, occiput, mesal and two lateral spots on 

 dorsum of pronotum, all but lateral margins of mesoscutum and 

 praescutum, axillae except mesal angles, mesal area of mesoscutellum, 

 most of ventral and lateral areas of thorax, metacoxae, and meta- 

 femora except basal, apical, and dorsal spots, lateral margins and 

 meson of propodeum, and transverse dorsal stripe on each segment of 

 gaster. The following parts usually black: Mesal stripe between 

 posterior ocelli, occiput near cervicum, longitudinal mesal stripe on 

 mesopraescutum and scutellum, variable marks on pleura, cephalo- 

 ventral angle of metepisternum, small area ventrad of propodeal 

 spiracles, transverse stripes on eighth tergite and base of epipygium, 

 and apex of ovipositor sheath. 



Female : -^^6 mm. Apex of antennal scape not quite reaching level 

 of ventral margin of anterior ocellus, pedicel three-quarters and ring 

 segment one-quarter length of segment 4, segment 5 slightly shorter 

 than 4, segments 5 to 10 decreasing progressively in length, so that 10 

 is one-quarter shorter than 4, 11 and 12 variable, usually equal to 10, 

 13 one-half or less length of 10 ; scrobe cavity shallow, edge carinate 

 only at ventral margin; interantennal projection with a minute dorsal 

 carina; frons pitted lateral to scrobe cavity and on narrow lateral 

 areas ventrad of antennal bases, elsewhere minutely reticulated, uni- 



