358 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lie 



areas on apical ends of the forefemora, the entire fore tibiae, foretarsi, 

 apical ends of the midfemora, basal ends of midtibiae, and traces of 

 yellow on apical segments of the hindlegs; wings subhyaline, stigma 

 lighter than normal for the group. 



Abdomen finely and closely pitted; first tergum and anterior half 

 of the second tergum reddish amber; broad yellow bands on terga 2 

 to 5 deeply emarginate ; anterior halves of terga 3 to 5 black ; sternum 

 hght amber, becoming darker apically; pygidium broad at the base, 

 gradually narrowing apically to a rounded end; small clusters of 

 bristles on each side inserted on the apical sternite. 



Male. — Length 8 mm. Black with Ught yellow and dark ferru- 

 ginous markings; punctation crowded; pubescence very short. 



Head subequal in width to the thorax; black except for the large 

 frontal eye patches, most of the medial lobe of the clypeus, and the 

 frons, all of which are light yellow; lateral lobes of the clypeus and the 

 free border of the medial lobe of the clypeus are black; medial clypeal 

 lobe \vith a small medial denticle and two less distinct lateral denticles ; 

 hair lobes extending onto the medial lobe; mandibles without denticles ; 

 antennae normal in form with a small yellow patch on the scape, the 

 peduncle dark and the flagellum fulvous below becoming darker above. 



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

 the tegulae, and a small spot on the pleuron below the wing, all of 

 which are light yellow; tegulae slightly elevated and with scattered 

 pits; enclosure deeply and coarsely pitted; mesosternal tubercles 

 absent; legs black except the apical ends of all femora and the more 

 apical segments, which are yellow infused with darker areas; the 

 third trochanter and the adjoining end of the femur dark ferruginous; 

 wings subhyaline, somewhat clouded at the apex and the stigma dark. 



Abdomen black except the first segment and the anterior margin 

 of the second sternite, which are dark ferruginous, and a broad convex 

 band on tergum 2, narrower emarginate bands on terga 3, 4, and 5, 

 and a small patch on tergum 6, all of which are light yellow; venter 

 all black except sternite 1 and the anterior border of sternite 2, which 

 are dark ferruginous; pygidium deeply pitted, strongly convex 

 laterally, proximal end rounded and distal end truncate. 



A study of many specimens from the same area shows the elongate 

 yellow spots on the vertex are common and vary in size. The tegulae 

 may also vary in elevation and smoothness. The female of C. argia 

 Mickel resembles others of the rufinoda group but is distinguished 

 easily by the clypeal process. 



Type. — The type female of C. argia Mickel is at the University of 

 Nebraska. 



