﻿68 



NORTH AMERICAN FAUNA. 



iiot agree with the descriptions of the latter given by Geoffroy or Dob- 

 sou. Mr. OUifield Thomas, after eorapariiig specimens of M. yunianen- 

 sis with the 71/. albescens identified by Dobson in the British Museum, 

 writes me that the two are in no way closely related. 



Laclv of an adequate series of skins prevents any determination of 

 the extent of individual color variation in this species. Specimens 

 taken at Fort Verde, Arizona, in May and August, are slightly darker 

 tlian those killed at the type locality in Ai)ril, while two July skins 

 from l*atzcuaro, Michoacan, are nearly as dark as the lightest examples 

 of M. yumanensis satiiratus. 



MYOTIS YUMANENSIS SATURATUS subsp. nov. 



Type from Hamilton, Washington. Adult ^ (skin), No. ^Hob? U. S. National Museum 

 (Biological Survey collection). Collected September 13, 1889, by T. S. Palmer. 

 Collector's number, 392. 



Geographic distribution. — Transition zone in Oregon, Washington, 

 and British Columbia. 



Gerieral characters. — Similar to typical Myotis yumanensis^ but fur 

 longer and color much darker. 



Fnr and color. — Fur distributed as in the typical subspecies. On the 

 middle of the back it averages about 9 mm. in length. Back dark glossy 

 yellowish brown (the exact shade usually between the 'sepia' and 

 'mummy brown' of Kidgway's Nomenclature of Colors, PI. Ill); belly 

 isabella color; chin, throat, and sides darker than belly; fur every, 

 wliere deep blackish plumbeous at base; ears and membranes blackish. 



3feasurements. — See table, page 69. 



Specimens examined. — Total number 19, from the following localities: 



Britisb Columbia: Kamloops, 1 (skin) ; Kultus Lake (near Cliilliwack), 1 (skin, 

 Miller coll.); Mount Lehman, 1 (skin, Am. Mus. Nat. Hist.); Port Moody, 1 

 (skin); Shuswap, 1 (skin); Sumas, 3 (skins, Miller coll.). 



Oregon : Crooked River, 1^ ; Lone Bock, 2^ ; Twelve Mile Creek, 1 '. 



Washington: Chelan, 3^; Hamilton, 2 (skins) ; Lake Cushman, 1 (skin) ; Neah 

 Bay, 1. 



General remarlcs. — Myotis yumanensis saturatus is readily distinguish- 

 able from true yumanensis by its much darker color. In this character, 

 however, it closely approaches the typical form of M. lucifugus, from 

 which it differs chieily in smaller general size and much smaller skull. 

 From M. lucif ugus hmgicrus it differs very noticeably in its shorter tibia 

 as well as in other characters. 



'These specimens may be nearer true yumanensis than saturatus. In alcohol, how- 

 ever, their color appears much too dark for the typical subspecies. 



