MYOTIS. 571 
Brachyotus Wolen., Allgem. Deutsch. Naturg. Zeitg. Dresden, 
neue Folge, 11, 1856, pp. 131-174. 
Isotus Kolen., Allgem. Deutsch. Naturg. Zeitg. Dresden, neue 
Folge, 11, 1856, pp. 131, 174-177. 
lath. Nat. Cl. K. Akad. Wiss. 
Wien, LX1I, 1870, abth. 1, p. 427. 
Comastes Fitzing., Sitzungber. Math. Nat. Cl. K. Akad. Wiss. 
/Eorestes Fitzing., Sitzungber, \ 
£ 8 
Wien, Lx11, 1870, abth. 1, p. 565. 
Form slender; tail long; face hairy; ears narrow; tragus, tapering 
: ’ i at ; ’ HHS, Ve 5» 
straight, or recurved; dental formula characteristic. 
FiG. 107. MYOTIS NIGRICANS. 
No, 105644 Coll. U.S. Nat. Mus. 
Skull eniarged 3 times, Nose view enlarged g times. 
KEY TO THE SPECIES AND SUBSPECIES. 
A. Free border of uropatagium conspicuously PAGE 
ical (1 hh a ae AA Kia oe aa ee ead M.thysanodes 572 
B. Free border of uropatagium not conspicuously 
fringed. 
a. Forearm more than 40 mm. 
a. wer Over ts Mim. ...... “er Orit ae! M. veltfer 
b. Forearm not less than 33 or more than 40 mm. 
Ae Pe) 
a’ Ear from meatus over 15 m. 
4‘? 
a. Back hair brown, belly isabella....M. peninsularis 573 
