486 A Revision of the Genera of Bats, 



seum collection since the publication of my paper, the latter of them 

 having been sent from Plymouth by Dr Leach. In 1833, Mr Leonard 

 Jenyns (Lin. Trans, xvi. 55, t. 1, f. 2.) described what he considered 

 as a species under the name of Plecotus brevimanus ; but from the ob- 

 servations which I have been enabled to make on the development 

 of the wings of these animals, (Phil. Mag. and Annals, vi. 1829-35,) 

 which do not gain their full size until after the animal has done suck- 

 ling, I am now certain that both the Vesp. pygmevs and Plecotus 

 brevimanus are only the young states of other species, the latter being 

 the young of the long-eared bat, and the former most probably the 

 young of the pipistrelle ; and I am borne out in this opinion by the 

 soft state of the cranium, the large size of the joint arising from the 

 epiphysis of the bones not being knit, of the specimen of both these 

 animals which have come under my notice, and I may observe, that 

 the first joint of the middle-finger of all the adult bats I have exa- 

 mined is as long as the arm-bone, which is not the case in these 

 animals. 



Fam. V. VESPERTILIONIDiE. 



The limbs elongated ; fingers of the fore-hands and tail enclosed 

 in a nearly naked membrane, serving for wings ; fingers very long ; 

 thumb free, clawed ; toes of hind-feet short, equal clawed ; teeth 

 variable. 



A. IsTioPHORi, or Leofvose bats. Nostrils placed in a bald space, 

 often elevated behind into a leaf; teeth acutely tubercular ; in- 

 dex-finger not clawed. 



Tribe I. Leaf nose kind. Phyllostomina. 



Nose-leaf expanded into a leaf behind, simple and pierced with 



the nostrils in front ; ears lateral, separate. 



■\ Forehead pitted ; ears close together. Old World. 



1. Rhinopoma, Geoff. Tail long, exserted beyond the short in- 

 terfemoral membrane ; forehead with a deep pit ; ears close to- 

 gether ; nose-leaf small. 



Indian Rhinopome. Rhinopoma Hardwickii, Gray. Zool. Misc. 

 37. Inhabits India. Gen. Hardwicke. 



Egyptian Rhinopome, Rhinopoma microphylla, Geoff. Vesp. 

 microphyllus, Schreb. Brunnich, Cat. Copenh. t. 6, f. 1-4. Inhabits 

 Egypt. Dr Rvippell. 



See also Rhinopoma Carolinensis, Geoff, if a true Rhinopome .'* 



1 1 Forehead simple, ears lateral, lotigue short, under lip entire with 



a triangular smooth space in front. New World. 



2. Arctibeus, Leac/z. — Phyllostonia, Spix. — Tail round (none .'') 

 interfemoral membrane deeply cut in, forehead simple, ears far 

 apart, lateral, nose-leaf simple lanceolate. 



