98 



BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



List. Mamm. North Amer., siippl., p. 154, 1917. — Miller, List North Amer. 

 Recent Mamm. 1923, Bull. U. S. Nat. Mus., No. 128, p. 67, April 29, 1924. 

 Myotis hayleyi Lydekker, ZooI. Record, 1909, Mammalia, p. 59, 1910 (misprint). 



Type locality. — ^West side of the Colorado River, 10 miles above 

 Needles, San Bernardino County, Calif. 



Type specimen. — Adult male, skin and skull. No. 137098 United 

 States National Museum (Biological Survey collection), collected on 

 the west side of the Colorado River, 10 miles above Needles, Calif., 

 May 14, 1905, by N. Hollister. Original No. 2237. 



Map 5. — Distribution of Myotis occcltds 



Distrihution. — From central and soutliAvestern New Mexico, across ^ 

 the southern half of Arizona southwestward on the Mexican high 

 lands as far at least as southern Sinaloa. 



Diagnosis. — Size and general external characters about as in Myotis 

 velifer peninisularis (average ratio of tail to head and body in 7 

 specimens, 81.8), but color strongly ochraceous and hairs of back with 

 obviously burnished tips which impart to the fur a gloss like that 

 present in M. lucifugus; skull with rostrum even more enlarged rela 

 tively to area of brain case than in M. velifer (compare figs. 8 and 6 

 of pi. 1, p. 7) ; brain case lower and more flattened than in M. 

 hjucifvigus lucifug^is, not higher and narrower as in M. iMlifer; cheek 



