516 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lie 



flanked laterally by a smaller denticle; clypeal process with the free 

 margin converging to an acute point; to each side of the process an 

 indistinct denticle; prominent bristles covering much of the clypeal 

 border; mandibles with two denticles, the more basal one much the 

 larger; antennae normal in form. 



Thorax black except for two separated fulvous patches on the 

 pronotum, the metanotum, which is yellow, and large patches on the 

 propodeum, which are ferruginous; tegulae low, smooth, and fuligi- 

 nous; enclosure with a medial groove and deep pits along the lateral 

 margins; mesosternal tubercles absent; legs ferruginous; wings 

 sybhyaline, somewhat clouded apically. 



Abdomen with the first tergum ferruginous marked with a more or 

 less broken band of yellow, the second tergum largely yellow with a 

 wedge-shaped emargination of ferrugmous, which may completely 

 divide the yellow markings medially; terga 3 and 4 with narrow 

 apical yellow bands, tergum 5 with a narrow yellow band, which may 

 be reduced to a medial patch; all abdominal bands show a break along 

 the medial line ; venter with the first two sternites largely ferruginous 

 and the remainder dark and unmaculate; pygidium with the sides 

 convex, the basal end small, and the apical end flaring slightly. 



Male. — Length 13 mm. Black and fulvous with lemon-yellow 

 markings; punctation somewhat coarse; pubescence somewhat longer 

 than average. 



Head slightly wider than the thorax, black except for the entire face 

 below the antennal scrobes, basal two-thirds of the mandibles, and 

 patch on the scape, all of which are lemon yellow; clypeal border with 

 three denticles on the medial lobe, the medial one being much the 

 longest; clypeal surface slightly convex; hair lobes extending over the 

 lateral clypeal lobes; mandibles with one denticle; antennae with the 

 terminal segment slightly curved and blunt. 



Thorax black except for two separated patches on the pronotum, 

 the metanotum, small spots on the propodeum, and spots on the tegu- 

 lae, all of which are yellow; tegulae low and smooth; enclosure with a 

 medial groove and one or two deep pits in the lateral angles; mesoster- 

 nal tubercles absent ; legs with the coxae very dark, the foretrochanters 

 and forefemora fulvous except for yellow patches on the latter, the 

 mid- and hindtrochanters yellow, the midfemora fulvous except for a 

 yellow patch, the hindfemora yellow on the basal half and fulvous on 

 the apical half, the remaining parts fulvous to fuliginous; wings 

 subhyaline. 



Abdomen with the first tergum fuscous with two large lateral 

 patches and two small medial spots of yellow; tergum 2 with a broad 

 band deeply emarginate and divided medially; terga 3 to 6 with narrow 

 posterior bands all divided medially; venter immaculate; pygidium 



