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. 
Atorestes Fitzing., Sitzungber, Math. Nat. Cl. K. Akad. Wiss. 
Wien, LXII, 1870, abth. 1, p. 427. 
Comastes Fitzing., Sitzungber. Math. Nat. Cl. K. Akad. Wiss. 
Wien, LXII, 1870, abth. 1, p. 56s. 
Form slender; tail long; face hairy; ears narrow; tragus, tapering, 
straight, or recurved; dental formula characteristic. 
Fic. 107. MYOTIS NiGRICANS. 
No. 105644 Coll. U. S. Nat. Mus. 
Skull eniarged 3 times. Nose view enlarged g times. 
KE YSROSR EES SPE GClESSAND SUBSPECGIES: 
A. Free border of uropatagium conspicuously PAGE 
TIISMECKOL as Se 2 Pagel ant re en ge M.thysanodes 572 
B. Free border of uropatagium not conspicuously 
fringed. 
a. - Forearm more than 40 mm. 
2 IS eye CN dere dns 00h0 0 Uae as eae ee a ae Mi veljer 573 
b. Forearm not less than 33 or more than 40 mm. 
a.’ Ear from meatus over 15 m. 
yy 
a. Back hair brown, belly isabella....M. peninsularis 573 
