MYOTIS 167 



1849. Tralatitus Gervais, Diet. Univ. d'Hist. Nat., xiii, p. 213 (Modifica- 

 tion of Trilatitus). 



1856. Brachyotus Kolenati, Allgem. deutsch. Naturhist. Zeitung, Dresden, 

 neue Folge, n, p. 131 (mystacinus, daubentonii, and dasyeneme). 

 Not Brachyotus Gould, 1837. 



1856. Isotus Kolenati, Allgem. deutsch. Naturhist. Zeitung, Dresden, neue 



Folge, ii, p. 131 (nattereri and emarginatus). 



1857. Vespertilio Blasius, Saugethiere Deutschlands, p. 78. Not Vespertilio 



Linnaeus, 1758. 



1866. Tralatitius Gray, Ann. and Mag. Nat. Hist., 3rd ser., xvn, p. 90, 



February 1866 (Modification of Trilatitus). 



1867. Ptemopterus Peters, Monatsber. k. preuss. Akad. Wissensch. Berlin, 



p. 706 (sub-genus of Vespertilio = Myotis, type lobipes = muricota) . 



1870. Exochurus Fitzinger, Sitzungsber. kais. Akad. Wissensch. Wien, 

 Math.-Naturwiss. Classe, lxii, p. 75 (macrodactylus, horsfleldii = 

 adversus and macrotarsus). 



1870. Aeorestes Pitzinger, Sitzungsber. kais. Akad. Wissensch. Wien, 

 Math.-Naturwiss. Classe, lxii, p. 427 (villosissimus, albescens, and 

 nigricans). 



1870. Comastes Pitzinger, Sitzungsber. kais. Akad. Wissensch. Wien, Math.- 

 Naturwiss. Classe, lxii, p. 565 (capaccinii, megapodius, dasyeneme, 

 and limnophilus). 



1878. Vespertilio Dobson, Catal. Chiropt. Brit. Mus., p. 284. Not Vespertilio 

 Linnaeus, 1758. 



1897. Myotis Miller, Ann. and Mag. Nat. Hist., 6th ser., xx, p. 382, 

 October, 1897. 



1899. Euvespertilio Acloque, Paune de Prance, Mammiferes, p. 38 (emargin- 

 atus, mystacinus, murinus = myotis, nattereri, and bechsteinii). 



1907. Myotis Miller, Families and Genera of Bats, p. 201, June 29, 1907. 



Type species. — Vespertilio myotis Borkhausen. 



Geographical distribution. — Entire mainland of Eastern and 

 Western hemispheres to limits of tree growth ; also the Malay 

 Archipelago, New Guinea, Australia and Samoa, and in America 

 the Lesser Antilles. 



Characters. — Dental formula : i g, c J--1, pm jg, m g = 38. 

 General form slender and delicate, even in such large species as 

 M. myotis, the skull slender and lightly built ; muzzle narrow ; 

 ear narrow and rather long, without special peculiarities of form, 

 the tragus at least half as high as conch, straight or slightly 

 curved, tapering gradually to a narrow or acute point. 



Remarks. — The genus Myotis is the most widely distributed 

 of the genera of bats. It is also probably the richest in species, 

 though these are at present so imperfectly known that no estimate 

 of their number can be made. Nine occur in Europe. These 

 present considerable differences in size, ranging from nearly the 

 smallest to nearly the largest members of the group ; they also 

 differ considerably among themselves in certain details of 

 structure, notably in the relative size of the hind foot ; but all 

 are recognizable, apart from their dental formula, by a certain 

 slenderness and delicacy of form, especially noticeable in the 

 muzzle, ear, tragus and skull. 



