1865.] 203 



spot, a dot beneath the hind wing, four longitudinal (two central and 

 a lateral) stripes on the niesothorax, dilated behind, the tegulre, scutel- 

 lum and postscutellum, and a large spot on each side of the metathorax. 

 yellowish-white; scutellum prominent; metathorax finely sculptured, 

 the elevated lines well defined, the central area moderate, elongate- 

 subquadrate. Legs slender, and including their coxae, yellowish-white ; 

 the four anterior femora at base within, the posterior coxae at base 

 within, their femora within except tips, and their extreme base exte- 

 riorly, black ; posterior tibiae within except extreme base, and their 

 tarsi entirely, fuscous. Abdomen strongly clavate, polished ; a spot on 

 the tip of the first segment, and the broad apical margins of the remain- 

 ing segments, white; basal segment depressed, with two tolerably well- 

 defined central carinas, and a stout tubercle on each side at base and a 

 smaller one on each side about the middle ; apex thickened and in- 

 curved, faintly compressed ; venter white, the extreme base black ; ovi- 

 positor subexserted. Length 41 lines ; expanse of wings 6£ lines. 

 One specimen. 



2. Cteniscus venustus. n. sp. 



Ferruginous; face, mouth, lower half of cheeks, pectus, spot on scutellum, 

 base of legs and apex of abdomen, yellowish ; wings fuscous ; abdomen clavate. 

 Female. — Head brownish-ferruginous, polished; face, inner orbits, 

 clypeus, mandibles except extreme tips, lower half of the cheeks and 

 the palpi, pale yellowish ; antennae, slender, filiform, nearly three-fourths 

 the length of the body, pale fulvous, blackish at the base, basal joint 

 beneath ferruginous. Thorax smooth and polished, brownish-ferrugi- 

 nous; lower margin of the prothorax, anterior part of the pleura, the 

 pectus, the tegulae and a spot beneath, yellow ; scutellum prominent, 

 yellowish-ferruginous, with a yellow spot at tip ; postscutellum tinged 

 with yellowish ; metathorax polished, the elevated lines sharply defined, 

 the central area rather small, elongate. Wings ample, fuscous, paler 

 at tips ; nervures fuscous, costa and stigma yellowish ; areolet triangu- 

 lar, oblique. Legs slender, pale yellowish ; the four anterior femora 

 exteriorly, the posterior femora entirely, and their tarsi, ferruginous ; 

 extreme base and apex of the posterior tibiae, dusky. Abdomen cla- 

 vate, smooth and polished, incurved at tip, pale ferruginous; narrow 

 apical margins of the second and third segments above, broad apical 

 margin of the fourth, and nearly the whole of the remaining segments 

 yellowish-white ; basal segment with a stout tubercle on each side near 

 the base and a smaller one on each side about the middle. Length 4 2 

 lines; expanse of wings 7 4 lines. 

 Two specimens. 



