40 



World, and the idea is somewhat strengthened hy its occurrence in 

 California and Bermuda. 



Major Le Coute has referred this species to the Vesp. cinereits of 

 the Catalogue of Peak's Museum, bearing date 1796. There ap- 

 pears to be no doubt that it was to this species that the above name 

 was applied, as the only other North American Bat with which it 

 would be likely to be confounded — V. noveboracensis — was clearly 

 distinguished in the Catalogue, and called V. rubellus. As I do not 

 know whether any description accompanied the name of V. cinereus, 

 I must for the present retain the name given by Say ; but in the 

 event of any specific characters having been added in the Catalogue 

 just referred to, the name of L. cinereus must of course be adopted. 



3. Lasiurus Grayi, n. s. 



This species, which I believe is undescribed, is in size a little su- 

 perior to the larger examples of L. noveboracensis, but smaller than 

 L. pruinosus. To the latter species, however, it bears the greatest 

 resemblance in its forms and general appearance, but differs in several 

 respects, which will be hereafter noticed. 



The muzzle is rather obtuse, but less so than in L. pruinosus. The 

 ears are angular-round, but more pointed than in the last-mentioned 

 species, and have the ear-lobe near the angle of the mouth, more 

 strongly developed. The tragus, although it presents the same 

 general form, yet differs in having the upper or ascending part 

 straight instead of being curved. It is also much narrower at its 

 base. 



The thumb has the same long terminal phalange and short basal 

 one observable in the last two species. The feet are large in rela- 

 tion to the size of the animal. The membranes of the wings extend 

 a little way beyond the extremity of the tibia, but do not reach half- 

 r way along the foot, exclusive of the toes. The extreme tip of the 

 tail is slightly exserted, and very pointed. 



The fur of the head extends down the forehead- nearly to the 

 nose ; the face is moderately hairy, and has a tuft of fine long hairs 

 immediately in front of the eye. The basal part of the hinder sur- 

 face of the ear is hairy, some of the hair projecting beyond the inner 

 margin so as to be visible from the front. Two patches of short ad- 

 pressed hair of a fine nature line the inside of the ear, one of them 

 extending from the front margin to near the tip, and the other 

 fringing that part of the margin nearest to the root of the tragus. 

 The latter part is sparingly covered with short adpressed hairs on 

 its exposed surface. 



The muzzle and greater part of the face are brownish-black. The fur 

 of the upper parts is of four colours — dark at its root, then yellowish- 

 brown, succeeded by dark brown, and tipped with white. Towards 

 the hinder parts of the body, and on the interfemoral membrane, the 

 yellowish colour gives way to the brown, and the fur is wholly of 

 the latter colour, tipped with white. The throat is light yellowish- 

 brown, passing into dusky-brown on the breast. On all the under 



