130 BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



Cranial tneoisurenientg of Myotis thysanodes — Continued 



I 



Locality 



Myotis thysanodes thysan- 

 odes— Continued 



San Luis Potosi: 



Hda. la Parada 



Do 



Do 



Do 



Do 



Jalisco: La Laguna 



Michoaean: 



Patzcuaro 



Do , 



Myotis thysanodes aztecns 



Oaxaca: 



San Antonio 



Hacienda de Cinco Sefiores 



Do 



Do 



Do 



I Type. 



MYOTIS SODALIS, new ipecies 



Myotis lucifugus Miller, North Amer. Fauna, No. 13, p. 59, October 16, 1897 

 (part; specimens from Mammoth Cave, Ky., listed on page 62). — Hahn, 

 Mamm. of Indiana, 33d Ann. Rept. Dept. Geol. and Nat. Resources Indiana, 

 1908, p. 621, 1909 (part: specimens from Wyandotte Cave, Ind.). — Cory, 

 Mamm. of Illinois and Wisconsin, Field Mus. Nat. Hist., publ. 153, zool., 

 vol. 11, p. 455, 1912 (part; specimens from Wyandotte Cave, Ind.). 



Type. — Adult female (skin and skull), No. 10980, Museum of Com- 

 parative Zoology, from Wyandotte Cave, Ind. Collected March 7, 

 1904, by J. O. Sibert. 



Distribution. — Eastern United States from the central Mississippi 

 Valley and northern Alabama to the western part of New England. 



The specimens studied, chiefly from wintering localities, probably 

 do not give a true idea of the summer distribution, for these hiber- 

 nating colonies may have come together from a considerable area. 

 Many individuals seem to leave the winter quarters in spring instead 

 of remaining in the caves to breed, though at Anniston, Ala., Dr. 

 E. R. Dunn obtained a male in Weaver's Cave on August 8, and the 

 United States National Museum has three taken in August in the 

 Wyandotte Cave, Ind. In the latter cave and in the Mammoth Cave, 

 Ky., Myotis sodalis is the common wintering bat. Thirteen were 

 taken in February from a cave in Center County, Pa. 



Diagnosis. — Size and general appearance as in Myotis ludfugus 

 lucifugtis, but with slightly longer tail (average ratio of tail to head 

 and body in 10 specimens from Vermont, 80.6 ; in 10 from Mammoth 

 Cave, 81.0) ; less enlarged foot (often not more than one-half the 

 length of tibia, the ratio of its average length to the average length 

 of tibia ranging from 49.3 to 51.7 instead of from 63 to 55.7), usually 



