280 [April 



and the basal joint of their tarsi, dusky. Abdomen sub fusiform, bright 

 fulvo-femiginous, smooth and polished, broad and subeompressed to- 

 wards the apex, in two specimens broad and subdepressed and more or 

 less varied with dusky (probably from discoloration ) ; venter yellowish, 

 spotted with dusky; ovipositor short, ferruginous, valves black, whitish 

 within. Length -U — •">•] lines; expanse of wings 9 — 10 lines. 



Male. — Resembles the female but more slender ; the face is entirely 

 bright yellow ; the fuscous spot on the vertex is larger and extends to 

 the base of the antennae; the antennae are much longer and fusco-ferru- 

 ginous beneath, dusky above, the basal joint beneath is yellowish; the 

 anterior lateral margins of the mesothorax are broadly yellow ; most of 

 the prothorax and the whole of the pleura, except two small ferrugi- 

 nous spots, are blackish, as well as the extreme lateral and apical mar- 

 gins of the metathorax ; the legs have more of a yellowish tinge ; the 

 posterior tibiae are blackish, yellowish at base, their tarsi are yellowish, 

 with the basal joint blackish; the abd mien is subcylindric and of a 

 uniform bright fulvous color, with the venter tinged with yellowish. 

 Length 6 lines; expanse of wings 10 lines. 



Five $ , one S , specimens. 



10. Exetastes decoloratus, n. sp. 



Black; face, two lines on mesothorax, most of metathorax and legs, and the 

 abdomen, obscure ferruginous; orbits and scutellum yellow ; wings hyaline. 



Male. — Head black, pubescent; face pale ferruginous ; orbits yellow; 

 clypeus and spot on mandibles, yellowish-ferruginous ; palpi dusky ; 

 antennae as long as the body, black, the basal joint beneath ferruginous. 

 Thorax very finely punctured, opaque above, somewhat shining beneath ; 

 two longitudinal lines on the mesothorax much dilated in front, a line 

 over the collar, upper margin of the prothorax, a spot beneath the 

 tegulae, all obscurely ferruginous ; scutellum rather depressed, shining, 

 bright yellow; postscutellum piceous ; metathorax finely punctured, 

 clothed with pale pubescence, black with the upper surface mostly fer- 

 ruginous, divided down the middle by a black line; tegulae dull honey- 

 yellow. Wings hyaline ; nervures fuscous, pale ferruginous at base ; 

 areolet moderate, subrhomboidal, subpetiolated. Legs long and slender, 

 ferruginous, the two auterior pairs more or less tinged with yellowish ; 

 four anterior coxae above, base and apex of the posterior pair, their 

 trochanters above, a line on all the femora above, and tips of the pos- 

 terior pair, black or blackish ; posterior tarsi dull yellowish with the 

 base and apex dusky. Abdomen rather short, narrow, arcuated, sub- 

 depressed, smooth and polished, ferruginous, slightly clouded with 

 dusky; extreme base of first segment black, with a stout tubercle on 



