220 Zoological Society : — 



some examples, are completely obscured by it. In breadth this 

 band of fur varies from half to three-quarters of an inch, widest 

 towards the fingers. Only a portion of the base of the interfemoral 

 membrane, as seen from below, is hairy. 



Viewed from above, the whole of the interfemoral membrane is 

 hairy, as are the feet and legs, and a portion of the membrane of 

 the wings, where they are attached to the sides of the body. The 

 hair on the latter part, however, is of no great breadth, and its outer 

 margin is usually straight and well defined. Over the tibia the inter- 

 femoral fur passes but to a trifling extent, and in many specimens 

 that limb constitutes its exact boundary. In the species last de- 

 scribed, the fur usually passes over it, and occupies a considerable 

 space on the base of the wing. 



The variations in colour in this species appear to be much less 

 considerable than in the last. The fur of the muzzle, chin, and 

 around the eyes, is black ; that of the throat pale huffy-yellow, 

 the line of separation of the latter colour and the black of the chin 

 being pretty distinct. On the forehead the fur is of the same yel- 

 lowish hue as that of the throat, and on the top of the head it is 

 similarly coloured at its base, but becomes of an umber-brown colour 

 about its middle, and is then tipped with white. This arrangement 

 of colours represents pretty nearly the colour of all the upper parts 

 of the body, excepting that the fur has in addition a dark-coloured 

 root. The colours may be thus briefly given : — dusky-grey (at the 

 root), yellowish-buff, umber-brown, and finally white. The white 

 is most plentiful on the shoulders, along the middle of the back, and 

 on the rump ; the yellow colour prevails on the head and neck, but 

 becomes less in regular gradation towards the rump, where the brown 

 in great measure takes its place, which it does completely on the 

 interfemoral membrane. 



The under surface is nearly similar, but differs in having the co- 

 lours paler, the yellow less conspicuous, and the tips of the hairs 

 buff-coloured instead of white. On the under parts, as on the upper, 

 the yellowish colour gives way to the brown on approaching the 

 hinder parts, and the hair on the contiguous part of the interfemoral 

 membrane is wholly dark for the greater part of its length, and 

 is tipped with light brown. At the insertion of the humerus is a 

 light-coloured spot. The fur of the sides of the body, under the 

 arms, is of a brownish-buff colour. All the fur on the wing-mem- 

 branes is buffy-yellow. 



The membranes are dark, excepting where there is a growth of 

 hair, such parts being reddish-brown. 



Der.tition.-In. ^ ; C. !;{ ; P.M. i;i; M. l;i=!|. 



In the following Table of dimensions, column No. 1 has been 

 taken from a specimen purchased of Mr. J. G. Bell of New York, 

 No. 2 from a specimen in the British Museum, from the United 

 States, and No. 3 from a specimen not quite adult, taken in Ber- 

 muda by the Rev. 11. B. Tristram, and very kindly forwarded by him 

 for my use. 



