39 



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 in- 

 terfemoral 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. 



Dentition—In. £ ;.Q.;g; P.M. '.£; M. £=« 



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. H. B. Tristram, and very kindly forwarded by him 

 for my use. 



No. 1. No. 2. No. 3. 



in. lin. in. lin. in. lin. 



Length of the head and body, about . . 3 6 310 210 



of the tail 1 10 



of the head Oil 10 



of the ear 4£ 4£ 



of the tragus 3 3 



of the fore-arm 2 3 2 2 2 



of the longest finger 4 4 4 4 



of the fourth finger. ..: 2 8 2 7 2 4 



of the thumb 6 6 



of the tibia 011 9 



of the foot and claws 6 5 5\ 



of the os calcis 9 .... 7\ 



Expanse of wings , 16 6 .... 15 6 



Hah. North America, not abundant. 



Major Le Conte observes, that he has only had the opportunity 

 of examining six or seven examples. The British Museum contains 

 a specimen from California, and another presented by Mr. W. S. 

 MacLeay is labelled South America. Assuming the latter specimen 

 to be correctly labelled, its locality renders it probable that this spe- 

 cies, like the last, is distributed over a considerable part of the New 



