490 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ne 



Head slightly wider than the thorax; most of the face below antennal 

 scrobes, base of mandibles, spots back of compound eyes, and the 

 scape, all yellow; vertex, genae, occiput, medial clypeal lobe below 

 the process, apical part of the process, medial segments of the an- 

 tennae, all ferruginous; frons black to fuscous; clypeal border with 

 two large, blunt denticles, between which is a deep depression; clypeal 

 process prominent, convex with sides subparallel, the apical margin 

 concave, and the lateral apical points acute; mandibles with three 

 denticles, the more apical one very large and the more basic pair small 

 and close together; antennae normal in form. 



Thorax black except for a broad band on the pronotum, the scutel- 

 lum, and the tegulae, all of which are ferruginous; and the metanotum 

 and patches on the propodeum, which are yellow, the latter bordered 

 with ferruginous; tegulae low and smooth; enclosure moderately 

 ridged longitudinally; mesosternal tubercles absent; legs ferruginous; 

 wings subhyaline, lightly shaded with ferruginous. 



Abdomen with the terga largely yellow but with areas of ferruginous 

 appearing medially on some terga and darker emarginations on the 

 anterior borders of most terga ; venter largely ferruginous with yellow 

 patches laterally on sternites 2 to 5 ; pygidium with the sides slightly 

 convex and converging to a rounded apical end. 



Male. — Length 11 to 12 mm. Black with yellow and ferruginous 

 markings; punctation average; pubescence somewhat longer than 

 average. 



Head slightly wider than the thorax; face yellow except for the free 

 margin of the clypeus, which is amber; remainder of the head black 

 except for a yellow spot back of the eye and a mottled ferruginous 

 area extending from one gena through the occiput to the other gena 

 and embodying the yellow spots back of the eyes; clypeal margin with 

 three subequal denticles on the medial lobe; hair lobes subequal in 

 length to the lateral lobes; mandibles with one small but distinct 

 medial denticle, basad of which there is a low sinuate carina; antennae 

 normal in form except for the apical segment, which is blunt and 

 curved ; scape yellow and the remaining segments ferruginous, becom- 

 ing darker apically. 



Thorax black except for a divided band on the pronotum, the 

 scutellum, the metanotum, a large patch on the propodeum, and the 

 tegulae, all of which are yellow and, in the case of the pronotum band 

 and the scutellum, bordered with ferruginous; tegulae low and smooth; 

 enclosure with a medial groove and variably ridged with the ridges 

 spreading posteriorly; mesosternal tubercles absent; legs yellow except 

 the dorsal surfaces of the first two pair of femora and the apical parts 

 of the hindlegs beyond the middle of the femora, all of which are 



