THE FAMILIES AND GENERA OF BATS. 20 1 
1841. Selysius Bonaparte, Iconografia della Fauna Italica, Introd., p. 3 
(mystacinus ) . 
1841. Capaccinms Bonaparte, Iconografia della Fauna Italica (capaccinii ) . 
1842. Trilatitus Gray, Ann. and Mag. Nat. Hist., X, p. 258, December, 1842 
( hasseltii , macellus=adversus. and blepotis=Miniopterus sp.). 
1849. Tralatitus Gervais, Diet. Univ. d’Hist. Nat., XIII, p. 213. 
1856. Brachyotus Kolenati, Allgem. deutsch. Naturhist. Zeitung, Dresden, 
neue Folge, II, p. 131 ( mystacinus , daubentonii, and dasycneme. Not 
Brachyotus Gould, 1837. 
1856. Isotus Kolenati, Allgem. deutsch. Naturhist. Zeitung, Dresden, neue 
Folge, II, p. 131 ( nattereri and emarginatus ) . 
1866. Tralatitius Gray, Ann. and Mag. Nat. Hist., 3d ser., XVII, p. 90. 
1867. Pternopterus Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 
p. 706 (subgenus of Vespertilio=Myotis, type, P. lobipes Peters-— Ves- 
pertilio . muricola Hodgson ) . 
1870. Exocliurus Fitzinger, Sitzungsber. kais. Akad. Wissensch., Wien, 
Math.-Naturwissensch. Classe LXII, p. 75 (macro dactylus, horsfieldii= 
adversus, and macrotarsus ) . Not Exochura Kolenati, 1858. 
1870. Aeorestes Fitzinger, Sitzungsber. kais. Akad. Wissensch., Wien, 
Math.-Naturwissensch. Classe LXII, p. 427 ( villosissimus , albescens, 
and nigricans). 
1870. Comastes Fitzinger, Sitzungsber. kais. Akad. Wissensch., Wien, 
Math.-Naturwissensch. Classe LXII, p. 565 ( capaccinii , megapodius, 
dasycneme, and limnopliilus ) . 
1878. Vespertilio Dobson, Catal. Chiropt. Brit. Mus., p. 284. Not Ves- 
pertilio Linnaeus, 1758. 
1894. Vespertilio H. Allen, Monogr. Bats N. Amer. (1893), p. 70, March 14, 
1894. 
1897. Myotis Miller, Ann. and Mag. Nat. Hist., 6th ser., XX, p. 382, October, 
1897. 
1897. Myotis Miller, North Amer. Fauna, No. 13, p. 55, October 16, 1897. 
Type-species. — V espertilio myotis Bechstein. 
Geographic 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. 
Number of forms . — About eighty species of Myotis are now known, 
making the genus one of the largest, as well as the most widely 
distributed of the order. 
Characters . — Dental fornmla: 
■2 3 . 1 . - 234567 . 2-2 1-1 _ 3-3 
1 2 3 . 1 . - 2 3 4 5 6 7 % 3 - 3 ’ 1 - V pm 3 ^ 3 ’ 
3 
3 
= 38 . 
Upper incisors well developed, subequal, closely crowded, the 
crowns higher than long, subterete ; the inner with a distinct posterior 
secondary cusp, the outer with a well-developed concave surface 
directed toward canine, from which it is separated by a space not 
quite equal to diameter of both incisors together. Lower incisors with 
crowns about equal in length, forming a continuous, strongly convex 
row between canines, the first and second with rather narrow, trilobed 
