324 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



convex, the face bulging more in front of the eyes than in most 

 species; face rather closely punctured and hairy along the mid- 

 dle line, less closely and more finely so below on the clypeus and 

 on the cheeks, faintly longitudinally striate or wrinkled near the 

 center; head black, end of clypeus sometimes slightly very dark 

 reddish; compound eyes dark, size medium; ocelli dark, the lateral 

 ocelli slightly but distinctly nearer to each other than to the median 

 ocellus; antennae 43-45 segmented, the last segment sometimes 

 indistinctly separated from the preceding, black except in imperfectly 

 colored specimens, which are brownish black, the first two segments 

 shining; labrum broader than long, black, with an indistinct paler 

 band across the lower margin, sparsely punctate and hany; mandibles 

 black or dark; beak black or blackish; palpi ^vith the last three 

 segments of both translucent, dirty yellow, the basal segments black- 

 ish, all of the segments of the maxillary palpi nearly cylindrical, 

 those of the labial palpi rather clavate, except the last; maxillary 

 palpi about twice as long as labial. 



Thorax. — Longer than high, black, often with more or less of the 

 propodeum, metathorax, and legs red; lateral lobes of pronotum 

 shining, nearly smooth in center, rather coarsely punctate and hairy 

 around the borders, with the grooves parallehng the hind margins 

 deeply crenulate but poorly defined; with the surface just below the 

 apical pits vertically ^vi-inkled, and the whole surface often more or 

 less roughened; proepisterna less densely punctate and hairy than 

 in many of the other species; pits at apex of the pronotum deep and 

 large, but not produced very far downward on the sides; mesonotum 

 shining, rather sparsely punctured and hairy; parapsidal furrows 

 straight, fairly sharp and deep, meeting behind to form a sharp, 

 shallow angle and continuing to the scutellar fossa as a single groove; 

 typically shallowly crenulate, at least about their middle, but these 

 crenulations apparently sometimes wanting in some specimens; 

 median lobe of mesonotum shallowly excavated along middle line; 

 lateral lobes also shallowly grooved down their middle; hind angles 

 of mesoscutum strongly produced as already described; scutellar 

 fossa deep and broad, with one prominent median longitudinal 

 carina bisecting it, and with one or two smaller often indistinct carinae 

 in each half; scutellum broadly triangular in outline, with the sides 

 and apex strongly rounded off, so the shape is almost that of a para- 

 bola; the whole disk of the mesopleurae uniformly punctured, the 

 venter a Uttle more densely hairy; length of mesopleural fiurow about 

 half the width of the pleurae, the furrow deep and more sharply 

 defined above, and directed diagonally upwards; metapleurae black 

 or red, the lower two-thirds roughened and irregularly areolate, the 

 upper third smoother and punctured; propodeum coarsely areolate, 

 the median ridges converging slightly toward the front, and then 

 meeting suddenly; spiracles elongate oval. 



