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U. S. NATIONAL MUSEUM BULLETIN 216 



1. Podoschistus vittifrons (Cresson) 



Front wing 6 to 13 mm. long; ovipositor sheath about 1.45 as long 

 as front wing. 



There is an eastern and a western subspecies, separable on color as 

 in the key below: 



1. Hind tibia entirely fuscous; range: Utah 



la. vittifrons schlingeri, new subspecies 

 Hind tibia fuscous, white at base; range: eastern North America. 



lb. vittifrons vittifrons (Cresson) 



la. Podoschistus vittifrons schlingeri, new subspecies 



Female type: Front wing 13 mm. long. 



Black. Palpi, stripe the length of upper margin of pronotum, and 

 tegula, white; frontal orbit with a faint stramineous stripe; coxae 

 and front and middle trochanters fulvous; front and middle femora 

 fulvous, a little paler in front, infuscate at apex above; front and 

 middle tibiae light brown, infuscate dorsally; tarsi fuscous, the hind 

 tarsus darkest: hind trochanters blackish, fulvous below; hind femur 

 fulvous, infuscate above, especially at base and apex; hind tibia 

 fuscous, its base a very little paler; hind margin of third and following 

 tergites white, the white interrupted sublaterally. 



Type: 9, Mantua, Box Elder Co., Utah, June 19, 1952, E. I. 

 Schlinger (Davis). 



We have a male from Estes Park, Colo., collected June 15, 1948, by 

 H., M., G., D., and J. Townes (Townes) which may be the male of this 

 subspecies or an intermediate. It is like the male of the subspecies 

 vittifrons except that the collar is only faintly marked with whitish, 

 and that the front and middle coxae and trochanters are mostly 

 fulvous. 



Figures 170, 171. — Localities: 170 (left), Podoschistus vittifrons schlingeri; 171 



(right), P. v. vittifrons. 



