52 ^fr. K. Aiiderscu on the Bats of the 



1. Micrunycteris ine(jaIotis, Gray. 



Teeth. — j)^ liiglier tlian p^ aad p^-, p-^ and /»4 subcqual in 

 height {p2, often a trifle lower) ; p^ in cross-section at ba<;e a 

 little smaller than p.i. — p"" about half the height of the canine ; 

 p^ and 7/ subequal in lieight. Tip of the principal cusp oi p^ 

 situated only very slightly in front of a vertical line through 

 the middle of the base of the ])reniolar ; vertical diameter of 

 p^ about equal to antero-posterior basal diameter ; external 

 surface oi p^ convex. 



Ears. — Long and broad, reaching beyond the tip of the 

 muzzle when laid forwards. Cross-stride on ear-conch faint 

 and rather ill-defined; number about 13-14; distance 

 between uppermost and lowermost stria about 11 ram. 



In the fully adult male the transverse band between the 

 ears is triangular in shape, i. e. low laterally, triangularly 

 raised in the middle ; a small notch at the middle of the upper 

 margin of the band (the top of the trian<.^le). Immediately 

 behind the band, in the fronto-parietal region, a triangular 

 groove bordered by a horseshoc-shai)ed elevation of the skin ; 

 the median, triangularly projecting portion of the band, when 

 laid backwards, fits exactly to tbe triangular groove, as the 

 lid to a box; tufts of long hairs on the posterior surface 

 of the " lid." The bat is no doubt able to cover and uncover 

 the groove by moving the band forwards and backwards. 



In females and young males the transverse band is much 

 lower, not conspicuously higher in the middle than laterally; 

 the frontal groove is absent or, at most, very ill defined. 



The frontal groove (which, to my knowledge, has not been 

 described by previous writers) is evidently analogous to 

 the frontal sac in many species of H'lpposiderus. The posi- 

 tion is the same; the long hairs recall the hair-tuft in the 

 Hipposiderus sac; and, as in the majority o^ HipposiJeri, the 

 apparatus is characteristic of the male sex. A frontal con- 

 cavity almost identical in structure and position is found in 

 the males of an Oriental species of Nydinomus [N.johorenais). 

 Nose-leaves. — Lancet long, i. e. its extreme length about 

 equal to 1 h its width at base. 



Wings. — Forearm practically naked ; some short, scattered 

 hairs are ohservahle on very close inspection, ^Ving- 

 membranes inserted on the ankles or the base of the meta- 

 tarsus. Length of forearm 31"8-38 mm. 



Foot and calcar. — The foot is ctmiparatively small, equal 

 to ^ or J? the length of tlie lower leg. Calcar long, al\va\s 

 longer than the foot, and always much more than half tlie 

 length of the lower leg. 



