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PROCEEDINGS OF THE NATIONAL MUSEUM 



Figure 22. — Distribution of PUcotus townsendii Cooper (western section): 1, P. t. fal- 

 lescens; 2, P. t. townsendii. Solid symbols, specimens examined; open symbols, other 

 records; encircled symbols, type localities. Cross-hatching indicates known areas of 

 intergradation between subspecies (between pallescens and townsendii in California, 

 Nevada, Idaho, Oregon, Washington, and British Columbia; between pallescens and 

 ingens in northern Texas, Oklahoma, and Kansas; and between pallescens and australis 

 in western Texas, Chihuahua, and Coahuila). 



Size averages medium for the subgenus ; forearm averages relatively 

 long. Rostrum averages relatively long, dorsolaterally inflated, and 

 usually not particularly depressed ; anterior nares relatively large and 

 usually rounded posteriorly (dorsal view). First upper incisor nor- 

 mally without secondary cusp ; upper canine averages less robust than 

 in northern populations ; anterointernal cingular cusp of P* frequently 

 present. 



Measurements: See tables 10, 16. 



