itnuidorsa/is, H. Allen, Proc. Acad. Nat. Scien. Phil., 1866, 

 p. 283. 



yumanensis, H. Allen, Proc. Acad. Nat. Scien. Phil., 1866, p. 

 283. (nee H. Allen, 1864.) 



melanorhinus, Merriam, N. Am. Faun, No. 3, i8go, p. 46. 



henshawi, H. Allen, Mon. Bats N. Am., 1893, p. 103. 



nigricans, H. Allen, Mon. Bats N. Am., 1893, p. 97 (note), (nee 

 Max.) 



Type locality. California. 



Geogr. Distr. Western United States and Lower California, east 

 to Wyoming and Texas. 



Genl. Char. Size very small, calcar very slender, lobule at tips 

 equal to free border of uropatagium which is naked: ears reaching 

 beyond end of nose; wings from base of toes. Skull: superior out- 

 line sloping gradually anteriorly to nasals; teeth feeble. 



Color. Above yellowish brown, beneath paler: fur plumbeous 

 at base. 



Afeasurements. Total length, 77.8-82; tail vertebrae, 38.8-39; 

 tibia, 13. 9-14.4; foot, 5.4-6; forearm, 31-32; thumb, 4-4.2; longest 

 finger, 55.4-58; ear from meatus, 1 2.9-14. 2; width of ear, 9.9-10; 

 tragus, 7.5-8.3. 



a.—cau,rinus. (Myolis), Miller, N. Am. Fauna, 13, 1897, p. 72. 



Type localitw Massett, Queen Charlotte Islands, British Co- 

 lumbia. 



Geogr. Distr. Humid coast districts of British Columbia, Wash- 

 ington and Oregon, possibly northern California. 



Genl. Char. Similar to typical M. californicus, but very much 

 darker in color. 



Color. Above blackish sepia, beneath slightly yellowish; the 

 fur everywhere blackish plumbeous at base. 



Measurements. Total length, l^-JT, tail vertebrae, 34; tibia, 13.8- 

 14; foot, 6.1-7; forearm, 32; thumb, 4.3-5; longest finger, 54; ear 

 from meatus, 12. 8-13. 2; width of ear, 8-9.5; tragus, 7. 



b. — eiliolabrum. {Myotis), Merr. , Proc. Biol. Soc. Wash., 1886, 

 iv, p. I. 



Type locality. Trego County, Kansas. 



Geogr. Distr. Kansas and central southern Dakota, limits of 

 range unknown. 



Genl. Char. Similar to J/, californicus, but paler. 



Color. General hue pale yellowish white; ears, muzzle and chin 

 dark brown, membranes light brown, edges paler. 



Measurements. Total length, 75-80.2; tail vertebrae, 34-36.7; 



