VESPEHTILIONID^. 167 



smaller tragus, and by the larger size of the second lower premolar. 

 I have compared specimens of JSf. fuUginoSa collected by Dr. Peters 

 and by Dr. Kirk with those of N. capensis, and fail to discover any 

 difference of sufficient importance to lead me to consider them 

 specifically distinct. I have also examined the type of Nycteris 

 damarensis, and find that it difEers from specimens of N. capensis in 

 its slightly larger ears, somewhat larger second lower premolar, and 

 white imder surface. These differences are probably due to the 

 combined effects of age and locality. N. capensis may turn out 

 hereafter, when a sufficient number of specimens are available for 

 comparison, to be a variety only of N. tliebaica. 



a. ad. sk. (type). South Africa. Sir A. Smith [P.]. 



h. ad. sk. South Afiica. Stockholm Museum, 



t;. ad. sk. South Africa (Damara Land). Purchased. 



(Type of N. damaretisis (Gray), Peters.) 



d. 5 ad., al. River Zambesi. Dr. Peters [0.]. 



{N. fidiginosa, Peters.) 



e. S ad., al. East Africa. Dr. Kirk [P.]. 



Family VESPERTILIONIDiE. 



Vespertiliones, Peteis ", MB. Akad. Beii. 1865, p. 258. 

 VespertUionidae, Dobson, Ann. 8f Mag. Nat. Hist. 1875, xvi. p. 347 ; 

 Monogr. Asiat. Chiropt. p. 82 (1876) f. 



Bats with nostrils opening by simple crescentic or circular aper- 

 tures at the extremity of the muzzle, not svirrounded or margined by 

 distinct f oliaceous cutaneous appendages J ; with moderately deve- 

 loped, generally separate ears with comparatively large tragi ; with 

 two phalanges in the middle finger, of which the first is extended 

 (in repose) in a Une with the metacarpal bone ; with rather short 

 legs and rudimentary fibulae ; with a long taU (in some genera 

 longer than the head and body) contained in and produced to the 

 hinder margin of the large interfemoral membrane. 



Skull of moderate size ; nasal and frontal bones not much ex- 

 tended laterally nor vertically, nor furrowed by deep depressions, as 

 in Nycteridm. The number of incisors varies from -^ to ^^, rarely 



(in Antrozous only) —^- ; premolars g^g, or jiig; or g:^^' rarely g^g 

 The upper iucisors are small, separated by a wide space in the 

 centre, and placed in pairs or singly near the canines.' Where the 

 upper premolars exceed one in number on each side, the anterior 

 premolars are generally minute, and often placed more or less 

 internal to the tooth-liae. The molars are weU developed, with 

 acute W-shaped cusps. 



* Add the genus NyctopMlus. 



t VespertilionidcB, Gray (Ann. & Mag. Nat. Hist. 1866, xvii. p, 89), inchides 

 genera belonging to very distinct families. 

 + A rudimentary nose-leaf in Nyctophilms. 



