6 1 2 Bulletin American Museum of Natural History. [Vol. XIX. 

 31. Myotis calif ornicus durangae, subsp. nov. 



Type, No. 21459, ? ac ^- Ri Sestin, northwestern Durango, April 

 15; J. H. Batty. 



Like M. c. ciliolabrum except in color. Upper parts pale fawn 

 brown (between drab and ecru drab of Ridgway) ; under parts grayish 

 white; fur at base everywhere dark plumbeous; ear brownish black, 

 much paler than in ciliolabrum; muzzle blackish. 



Measurements. Type, total length, 76; tail vertebrae, 33; fore- 

 arm, 33; longest finger, 54; tibia, 15; foot, 7; ears from meatus, 13.5. 

 Five other specimens, collected at the same time and locality, vary 

 but slightly from the above, the extremes varying only 4 mm. in total 

 ength and 2 mm. in the length of the forearm. 



Represented by 6 skins and skulls taken at Rio Sestin, April 15, and 

 6 in formalin collected at San Gabriel, June 16. 



This subspecies presents a very distinct type of coloration in the 

 Myotis calif ornicus group, intermediate between that of M. c. mexi- 

 canus and M . c. ciliolabrum, but very different from either. It agrees 

 in size very closely with ciliolabrum. 



32. Vespertilio fuscus (Beauvois). 



Two specimens, Arroyo de Bucy, May 22 and 24. Ex- 

 panse, 318 and 320. Not appreciably different from Arizona 

 specimens. 



33. Antrozous pallidus (Leconte). 



One specimen, adult male, Rio Sestin, April 13. Expanse, 

 362 ; total length, 102. Paler, and whiter below than Arizona 

 and Texas specimens. + 



34. Nyctinomus mohavensis Merriam. 



Three specimens, Rio Sestin,, April 1 3 and 1 6. Provisionally 

 referred to mohavensis. 



