58 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXIV. 



mesopteiygoid fossse, of which the posterior end is of quite a' 

 different shape. The small anterior premolar is also proportionally 

 larger. 



The only Indian species is Saccolcdmus saccolaimtis, of which 

 Blyth's Ta2}h oous crassus appears to be a synonym. 



TapJio'^ous nucliventris and haclihensis. 



These two bats are undoubtedly very closely allied, and are not, 

 as Dobson thought, distinguished by any difference in the gular sac. 

 In both the male has a shallow sac, its posterior wall 1-2 mm. in 

 depth, while the female has none, but has a naked area correspond- 

 ing to the position of the sac. 



A comparison of skulls, however, shows that the Asiatic form 

 is larger and heavier, and they may therefore be kept as distinct 

 species. The skull of hachhensis generally exceeds 27 mm. in 

 length from the occipital crest to the base of the canines, while in 

 nucliventris this dimension is ander 26 mm. And the larger skull 

 is even disproportionally more bulky throughout. 



The ranges of the two correspond geographically wdth the 

 Continents, hichhensis Asiatic, from Palestine, through Meso- 

 potamia and Persia, to India and Burma; nucliventris African 

 and i^rabian. 



Considering its great range, from Palestine to Burma, it is not 

 surprising that T. Jcachhensis is distinguishable into several geogra- 

 phical races, of which three ought to be recognised by name, re- 

 spectively, western, central and eastern. The central, typical form 

 is now, thanks to the Bombay Natural History Society's Survey, 

 represented in the Museum by a fine series of specimens, ranging 

 from Cutch to Bellary in S. India and Hazaribagh in Bengal. All 

 are very similar in colour and other characters, while the western 

 and eastern forms may be distinguished as follows : — 



Taijliozous iMchhensis babylonicus, subsp. n. 



Colour much paler than in true hachhensis. 



Size at a maximum, the type slightly larger than any Indian 

 specimen available. Fin- short, almost as much so as in the 

 Burmese race. General colour above drabby whitish, the hairs 

 white at base, pale brownish drab at tip ; in true haclihensis 

 the colour is pale olive brown or sepia. Undersurface dull 

 white or pale brownish white, the middle line whiter, the sides 

 browner. 



Skull stout and heavy, averaging slightly larger than in true 

 Tiacliliensis. 



Dimensions of the type : — Forearm, 81 mm.; another specimen, 82. 



Skull : — Greatest length (c) 28-8; length from condyle to front of 

 canine, 26.8; zygomatic breadth, 18.3 ; interorbital breadth, 8.7; 



