138 U. S. NATIONAL MUSEUM BULLETIN 216 part s 



lateral lobes, its punctures small, weak, separated by about 1.3 their 

 diameter; scutellum carinate only at its basolateral corners; meta- 

 pleurum somewhat mat or subpohshed, with weak, more or less dis- 

 tinct punctures and irregular fine wrinkling; apical carina of propo- 

 deum complete, sharp and strong, its median 0.25 ± bowed strongly 

 forward; postpetiole weakly mat, with moderately large, weak punc- 

 tures that are separated by about 1.5 their diameter, or are sparser; 

 punctures on second tergite rather large, moderately strong, separated 

 by about 0.7 their diameter. 



Coloration variable. The darkest specimens colored almost as 

 in /. pinguis pinguis but with some brown or whitish usually on the 

 clypeus, hind corner of pronotum, subtegular ridge, and scutellum, 

 and a tendency for apical 0.3 ± of hind coxa to be weakly infuscate. 

 The palest specimens are mostly fulvous with extensive white mark- 

 ings. The head varies from entirely black with the clypeus broAvnish, 

 to mostly white with the median part of the frons and most of the 

 occiput blackish. The antenna is black with the scape white or 

 fulvous in front and a broad white band on the flagellum. The basal 

 segments of the female flagellum are often brownish. The thorax 

 varies from black with the hind corner of the pronotum and scutellum 

 more or less whitish or brown, to fulvous with the pronotum, proster- 

 num, mesosternum, scutella, most of mesopleurum, and narrow 

 markings on mesoscutum whitish and the margin and hind part of 

 mesoscutum, areas next to scutella, and mesopleurum below the 

 subtegular ridge fuscous. The tegula is always white. The front and 

 middle legs vary from dark fulvous with the trochanters whitish and 

 the tibiae and tarsi somewhat darkened, to stramineous with the 

 coxae and trochanters whitish. Usually there is a faint repetition of 

 the banding of the tibia and tarsus of the hind leg on those of the 

 middle leg, and sometimes also on the front leg. The hind coxa is 

 fulvous, sometimes a little darkened apically; hind trochanters 

 fulvous or more or less whitish; hind femur fulvous, its apical 0.18 ± 

 infuscate; hind tibia fulvous to bro^vn, its basal or subbasal 0.18± 

 white; hind basi tarsus entirely white, or apically fuscous with its 

 basal 0.18 or more white; second segment of hind tarsus white to light 

 brown, usually white with more or less of the apex fuscous; third and 

 fourth segments of hind tarsus usually entirely white, sometimes 

 brownish apically; fifth segment of hind tarsus brown or black. 

 The abdomen is usually fulvous, often with its apex fuscous. Some- 

 times it is more extensively fuscous and rarely entirely fuscous except 

 for paler apical margins of the median tergites. 



Specimens from the northern part of the range and smaller speci- 

 mens both tend to have darker coloration than those from the southern 

 part of the range and larger specimens. There is considerable regional 



