56 Mr. K. Aiiclersoii on the Bats of the 



sonie of them ickite, others greyish wliite below, and have the bass 

 of the hairs of the upperside white. If, tlierefore, there is no other 

 difference between M. Jiypoleuca and M. viinuta, the former cannot 

 be distinguished from the latter. I understand from Dr. Allen's 

 description that he had no example of M. minuta for comparison. 



Teeth. — p-^ ranch lower than /?4, only a little higher than 

 the ciiijiulum of p.y- — //' much lower than 7/, only a little 

 liigher than the cingulum of the canine. Principal cusp of 

 p^ situated near the anterior end of the tooth ; vertical 

 diameter of jj^ markedly shorter than antero-posterior basal 

 diameter; external surface oi j/ concave. 



Ears. — Essentially as in M. megahtis : long and broad, 

 extending beyond the tip of the muzzle when laid forwards. 

 Cross-stripe on ear-conch faint and rather ill-defined ; number 

 about 11-12; distance between uppermost and lowermost 

 stria about 10 mm. 



In the fully adult male the transverse band between the 

 ears is as high as, or, rather, still higher than, in the male of 

 M. meijaloiis ; but the median notch is extremely deep, 

 reaching practically to the base of the band, thus dividing if. 

 into tiuu distinct triavgulur lobes. A coat of long hairs on 

 the posterior surface of the band. Frontal groove as in the 

 male of M. megalotis. 



Spirit- specimens of females are not available for examina- 

 tion. 



Nose-leaves. — Essentially as in M. nwyalotis, but lancet 

 comparatively a trifle shorter, its extreme length being on 

 average equal to about 1^ its width at base. 



Wings (compare the wing-indices below, p. 65). — The 

 metacarpals are proportionately shorter than in M. megalotis ; 

 an inspection of the measurements (below, pp. 64— 1!5) Avill 

 show that whereas M. mimda has the forearm of precisely the 

 same length as M. m. mexicana, its metacarpals are as short 

 as in the small southern race, M. in. tf/pica ; this, together 

 Avith a shortening of the proximal phalanges, makes as a 

 t(.tal result a jjropurtionately shorter hand in M. minuta. The 

 second phalanx of the fourth digit is practically equal to the 

 first phalanx (in M. megalotis decidedly shorter than the first 

 phalanx) . 



The muscular part of the forearm is densely haired. 

 jNlembranes inserted on the ankles or the extremity of the 

 tibia. Forearm 36-37"5 mm. 



Foot and calcar. — The foot is comparatively large, much 

 more than \ the length of the lower leg. Calcar short, 

 always shorter than the foot, and less than ^ the length of 

 the luwer leg. 



