332 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



Fernale.^-H.ea.d broad, slightly excavate in front, well rounded 

 behind; clypeus ferruginous, somewhat convex, (luitc densely covered 

 with yellowish-white pubescence and long hairs; anterior edge making 

 quite a smooth, regular curve, and slightl}' or not at all reflexed; frons 

 depressed along its middle, ferruginous, densely ^^ellowish- white pubes- 

 cent as far up as opposite the posterior ocelli; area around the ocelli 

 darker than the rest of the frons, more or less black; distance between 

 the posterior ocelli about equal to their distance from the eye; a groove 

 extends backward from the median ocellus between the lateral ones, 

 along which the ferruginous color is present; vertex and cheeks fer- 

 ruginous, with rather sparse, whitish pubescence on the cheeks, which 

 are Inroad above but taper rapidly downward to the level of the lower 

 edge of the eye, where they suddenly widen, forming a broad articu- 

 lation for the mandible; the tapering part of the cheek bears numerous 

 long, white hairs; e^'cs black, large, converging somewhat toward the 

 clvpeus and without a projection toward the middle at the vertex; 

 antenna^; scape, pedicel, and proximal part of the first filament seg- 

 ment ferruginous; remainder l)lack; scape with a few short, whitish 

 hairs; relative length of filament segments j\, fV, ^\, f ; mandi])les 

 pale ferruginous to 3^ellowish, their tips dark; two toothed, the teeth 

 quite blunt (in the tjqie), not reaching the base of the other mandible; 

 with a row of pale hairs on the hinder surface. 



Thorax. — Ferruginous; neck slender, short; collar In-oad from front 

 to rear, its anterior face strongh" convex laterally and quite so verti- 

 cal 1}^; its dorsal edge broad l)oth laterally and from front to rear; the 

 anterior face and dorsal edge whitish pubescent, less so at the sides; 

 prothoracic lobe large, quite densely pubescent, with a smooth, rounded 

 elevation at its base above; propleuron and prosternum sparsely cov- 

 ered with short, whitish hairs; mesonotum ferruginous, slightly darker 

 beiiind, ([uite densely pubescent except on a pair of parallel, rounded 

 ridges arising near the front of the plate and extending backward, 

 which are unclothed; mesopleura and mesosternum ferruginous, the 

 former quite densely, whitish pubescent; the latter with a few short, 

 scattered hairs; scutellum elevated, somewhat impressed in the middle 

 l)uthardly t)itul)erculate, slightly pubescent, ferruginous; postscutellum 

 ferruginous, narrow, densely pubescent; median segment dorsum with 

 a densely pubescent, yellowish-white band along its middle, its sides 

 black, obli(iuely aciculate and naked; angle between the dorsum and 

 the posterior end slight, the end and sides of the median segment 

 densely pul)escent; stigmatal groove al)sent; metapleura ferruginous, 

 anteriorly coarsely, obliquely aciculate and punctured; behind, nearer 

 the hind cox«, pubescent; petiole ferruginous, slightly darker at its 

 base, long, slightly l)ent upward, naked; as long as the hind metatarsus. 



Ahdo7nen. — Ferruginous, rising sharply from the petiole, laterally 

 compressed, elongate posteriorlv; above; first two plates lighter, the 



