Mr. R. F. Tomes on the species of Lasiurus. 221 



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



in. lin. in. lin. in. lin. • 



Length of the head and body, about . . 3 6 3 10 2 10 



of the tail 110 



of the head Oil .... 010 



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 Oil 9 



of the foot and claws 6 5 5^ 



of the OS calcis 9 .... 7i 



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 

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

 California and Bermuda. 



Major Le Conte has referred this species to the Fesp. cinereus of 

 the Catalogue of Peale'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 F. rubellus. As I do not 

 know whether any description accompanied the name of F. cinereusy 

 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. 



