NO. 1101. 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



103 



White River Pass, Washingtou, and at Carberry's Ranch, California, 

 the range is known to extend into the mountains, and the species may 

 yet he found on the east side and also farther .south in the Sierra 

 Nevadas. No specimens have been found in the Sacramento Valley, 

 however, and it will perhaps be found that south of Carberry's Ranch, 

 at the junction of the Sierra ISTevada and coast ranges, the eastern 

 bonndary follows the line of the latter rather than tlie former. 



GEOGRAPHICAL DISTRIBUTION OF NEUROTRICHUS. 



GEOaRAPIIICAL VARIATION. 



The siieciraens at hand are not sufticient for demonstrating the extent 

 of the variation in Xeiirotrichu-i. The indications, however, are that 

 there is only a slight variation in size, and certainly no important 

 variation in color. The only considerable series of specimens from one 

 locality is that from Sumas, British Columbia. This includes 12 males 

 and 21 females, which are adult or nearly so. The average and maxi- 

 mum dimensions of these according to the collector's measurements 

 are as follows : 



