VESPERTILIONID A: 661 
the glandular prominences of the sides of the muzzle, which meet 
in the centre above and behind the nostrils. P. awritus extends 
over the greater part of the Palearctic region, occurring in Ireland 
in the west and the Himalaya in the east. 
Synotus.|—Dentition : 1 2, ¢ 4, p 2, m3; total 34. This genus 
is distinguished from the preceding by the loss of one lower pre- 
molar and by the outer margin of the ear being carried forwards 
above the mouth and in front of the eye; it includes the European 
Barhastelle Bat (S. barbastellus) and S. darjilingensis from the Hima- 
laya. 
Otonycteris.2— Dentition: 1 4, ¢ 4, p 4, m 4; total 30. The 
reduction in the number of upper incisors readily characterises this 
genus, which appears to connect the typical representatives of the 
section, through Scotophilus, with the Vespertilionine division. It is 
represented by a single species, 0. hemprichi, from North Africa and 
the Himalaya. 
Nyctophilus.2—Dentition: i 4, ¢4, p 4, m3; total 30. This 
and the following genera are distinguished from all the preceding 
by the presence of a rudimentary nose-leaf. The present genus 
contains IV. timoriensis of the Australian region, and N. amécrotis of 
New Guinea. 
Antrozvus.A—Dentition: 11, ¢ 4, p $, m4; total 28. Readily 
distinguished from the other members of the whole family by 
having but two lower incisors, and from the other species of the 
section by the separate ears. The single species, 4. pallidus, in- 
habits California. 
The /espertilionine division includes some nine-tenths of all the 
representatives of the family. They are distinguished from the 
preceding section by the simple nostrils, opening by crescentic or 
circular apertures at the extremity of the muzzle, the generally 
smill size of the ears, and the absence of grooves on the forehead. 
Vesperugo.,—Dentition : 7 mo ci,p ee m #; total 34, 30, 
or 36. This large genus comprises about one-third of the section, 
and is divided into groups or subgenera, according to the number 
of premolars and incisors; the latter varying from % to 4 in the 
subgenera Stotuzous and Ihogeé’sss, and the premolars from 3 to } (in 
the subgenus Lusionycteris 2). The Bats of this genus are generally 
easily distinguished by their comparatively thickly formed bodies, 
flat broad heads and obtuse muzzles, short, broad, and triangular 
obtusely-pointed ears, obtuse and usually slightly incurved tragus, 
short legs, and by the presence in most species of a well-developed 
post-calcaral lobule. This lobule (which is supported by a. cartil- 
1 Keyserling and Blasius, I irbelthiere Europ. p. 55 (1840). ? Peters, 
Monatsber, Ak, Berlin, 1859, p, 222. 3 Leach, Trans. Linn. Soc, vol. xiii. 
p. 78 (1822), + Allen, Proc. Ac. Nat. Sci. Philacl. 1862, p. 247. 
5 Keyserling and Blasius, Wieginann’s Archiv, 1839, p. 312. 
