342 U. S. NATIONAL MUSEUM BULLETIN 2 1 6 part 3 



flattened, the apical margin weakly arcuate or almost truncate (some- 

 times the clypeus is narrower and more convex) ; temple moderately 

 convex; cheek rather short; punctures on cheek moderately coarse, 

 separated by about 0.8 their diameter; occipital carina strong and 

 sharp but not raised as a lamella; second flagellar segment of male 

 about 2.4 as long as wide, of female about 4.0 as long as wide; thorax 

 rather short; notauli distinct usually for about 0.2 the length of 

 mesoscutum; punctures on mesopleurum very coarse, separated by 

 about 0.4 their diameter; propodeum short, in the female its apical 

 carina usually interrupted medially, the sublateral portions of the 

 carina strong and sharp, rather gently sinuate, and forming rudi- 

 mentary sublateral crests; areolet approximately parallel-sided; hind 

 femur of male about 5.6 as long as deep, of female about 5,4 as long 

 as deep; nervulus beyond basal vein by about 0.3 its length; nervellus 

 broken near or below the middle; petiole with indistinct rounded 

 dorsolateral and ventrolateral ridges, in cross section wider above 

 than below, in female more rounded than in male, its lateral face with 

 some weak rugulosity in male, almost smooth in female; second 

 tergite subpolished, the sockets of its sublateral hairs separated by 

 about 0.8 the length of the hans, those of the median hairs a little more 

 distant. 



The ferruginous hind femur, slender build, and broad, rather flat 

 clypeus distinguish this species. 



There is a northern and a southern subspecies, differentiated as 

 below. The zone of intergradation between the two subspecies is 

 moderately wide, and intermediate individuals are frequent. 



MALES 



1. Tegula brown to fulvous, sometimes as much as half white; front and middle 

 tibiae entirely fulvous, or with a narrow and usually interrupted white dorsal 

 stripe; range: Alleghanian and Carolinian faunas. 



2a. similis badiarinus, new subspecies 



Tegula entirely white or more than half white; front and middle tibiae fulvous, 



with a broad white dorsal stripe their entire length, often with a small 



indistinct dorsal dark area at the basal 0.3; range: Carolinian and Austro- 



riparian faunas 2b. similis similis (Cresson) 



FEMALES 



1. Segments 2 and 3 of hind tarsus brown, not or only indistinctly paler than 

 segment 1; range: Alleghanian and Carolinian faunas. 



2a. similis badiarmus, new subspecies 



Segments 2 and 3 of hind tarsus entirely or more than half white to light brown, 



distinctly paler in general color than most of segment 1; range: Carolinian 



and Austroriparian faunas 2b. similis similis (Cresson) 



