282 RHINOLOPHID.E. 



B. Size small, forearm less than 3 inches. 



a. Posterior margin of nose-leaf termin- 



ating in three sharp points ; forearm 



l-7o H. triden*, p. 282. 



b. Posterior margin of nose-leaf rounded. 

 a'. Three supplementary leaflets on each 



side of the horseshoe. 

 a". Surface of posterior leaf divided 



into 2 cells ; forearm 2 - 6 H. nicobarenxis, p. 286. 



b". Surface of posterior leaf divided 



into 4 cells. 

 . Posterior leaf narrower than 



horseshoe ; forearm 2 - 4o .... H. leptopfiyllum, p. 284. 

 /3. Posterior leaf as wide as horse- 

 shoe or wider. 



a'. Hinder margin of interfem- 

 oral membrane straight; fore- 

 arm 2 H. speorig, p. 287. 



/3'. Hinder margin of interfem- 

 oral membrane forming a 



salient angle ; forearm 2-25 //. larvatun, p. 288. 

 b'. Two supplementary leaflets ; forearm 



1-75 //. yaleritus, p. 287. 



c. No supplementary leaflets. 



a". Ears laid forward extend to muz- 

 zle : forearm l - 55 H. bicolor, p. 289. 



b". Ears do not extend to muzzle ; 



forearm 1*4 //. amboinensis, p. 290. 



158. Hipposidems tridens. The trident leaf-nosed But. 



Rhinolophus tridens, Geoffroy, Descr. de TEyypte, ii, p. 130 (1813). 

 Phyllorhiua tridens, Dobson, Cat. Chir. U. M. p. 131. 

 Phyllorhina tridens, var. murraiana, Anderson, Cat. p. 1.13; Murray, 

 Vert. Zool. Sind, p. 6, pi. i, fig. 2 (head). 



Ears of moderate size, tips pointed, outer margin slightly con- 

 cave above, then convex, inner margin very convex. Anterior 

 nose-leaf or horseshoe semicircular, having, on each side, two 

 secondary leaflets ; sella prominent, trilobate ; posterior leaf having 

 the surface divided into four cells by three longitudinal ribs, and 

 terminating above on the forehead in three thickened and pointed 

 projections. 



Wings from the lower third of the tibia ; interfemoral membrane 

 short, square behind ; the last two vertebra of the tail and some- 

 times part of the penultimate free. First minute upper premolar 

 deciduous. 



Colour of fur above greyish brown, the basal portion paler, 

 sometimes white ; beneath wholly yellowish white or pure white. 



Dimensions of a Karachi specimen : head and body 2'3 inches, 

 tail 1, ear from origin of outer margin 0'75, forearm 2-1. African 

 specimens are smaller. 



Distribution. Sind ; procured in Karachi by Mr. J. Murray, who 

 observed it in April about dusk in large numbers. Also found in 

 Southern Persia, Mesopotamia, Egypt, and Zanzibar. 



