80 APPENDIX. 



beyond the interfemoral membrane, whicli is slightly sprinkled with hair 

 above and beneath. 



Color. — The nose and chin are black ; ears light brown ; wing membranes 

 dark brown. The whole of the fur of the body above and beneath is, from 

 the roots, a uniform delicate brown color. 



This species differs from Say's Bat, not only in color but in the much 

 shorter ears and tragus. The size and shape of the tragus we have found 

 an invaluable guide in our American bats ; the ears of the present species, 

 when alive, are always erect ; whilst those of Say's Bat are folded back- 

 wards like those of the long-eared bats — Plecotus. 



n ,•-• T • 2—2 „ . 1—1 



Dentition. — Incisors ■ Canines . 



6 1—1 



Dimensions. — Length of head and body, 1 in. 8 lines ; length of tail, 1 

 in. 6 lines ; height of ear, 3 lines ; height of tragus, 1\ lines. 



N. B. — The tragus in Say's Bat is four and a half lines in height. Several 

 specimens of this bat were obtained during the summer, on the mountains 

 of Virginia at the Gray Sulphur Springs. They were uniform in size and 

 color. 



V. virginianus. (Virginian Bat.) — V. vespertilione monticola paulu- 

 lum longior, auriculus paululum longioribus magisque acutis ; dentibus 

 primoribus maxillae superioris simplicibus ; interfemorali membrana nuda; 

 corpore supra fuligineo-fusco ; subtus cinereo-fuscato. 



Virginian Bat. — A little larger than the Mountain Bat; ears a little 

 longer and more pointed ; upper fore teeth simple ; interfemoral membrane 

 naked ; sooty brown above, ash brown beneath. 



Dentition. — Incisors . Canines . 



6 1—1 



In size this species is intermediate between V. carolincnsis and V. suhu- 

 latus. The ear is naked, less rounded, and more pointed than either of the 

 other closely allied species. The tragus is very narrow, linear, and less 

 than half the length of the ear. The tail is inclosed in the interfemoral 

 membrane, except the penultimate joint, which is free. The anterior 

 upper fore teeth, instead of being sub-Simple, as in the V. carolinensis, or 

 bilobate, as in V. snbulatus and V. montanus, are simple. 



Color. — The nose, upper lip, and upper jaw are black ; wings dark 

 brown. The back is sooty brown ; on each shoulder, at the insertion of 

 the wing, there is a circular black spot about four lines in diameter ; on 

 the under surface cinereous brown. 



Dimensions. — Length of head and body, 2 in. 5 lines ; length of tail, 1 

 inch ; height of ear, 4 lines ; height of tragus, If lines. 



Hab. Mountains of Virginia. 



V. leibii. (Leib's Bat.) — V. supra fusco-ferrugineus, subtus cinereus, 

 alls auribusque nigris. 



LeiVs Bat. — Ears and wings black ; dark yellowish-brown above ; cine- 

 reous beneath. 



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