84 



Vesfeetilio nogtivagans. LeConte. 

 Silver Black Bat. 



1831. Vespertilio noctivagans, LeConte, McMurtrie's Cuv., i, 1831, 33. — ■ 

 Cooper, Ann. Lye. N. Y., iv, 1837, 69.— De Kay, Nat. Hist. N. Y., 

 1842, 9, pi. i, f. i.— Wagner, Suppl. Schreb., v, 1855, 754.— Jor- 

 dan, Man. Vert., 1878, 22. 



1831. Scotophilus auduboni, Harlan, Month. Am. Jour., i, 1831, 220, pi. 2. — 

 Med. and Phys. Res., 1835, 30, pi. 4. 



1835. Vespertilio pulverulentus, Temm., Monog. Mamm., ii, 1836, 235. — 

 LeConte, Proc. Phila. Acad., 1855, 436. — Maxim., Arch. Naturg., 

 1861, 192 



. Scotophilus noctivagans, H. Allen, Monog., 39. — J. A. Allen, Proc. 



Best. Soc. Nat. Hist., xvii, 1874. 



1857. Vespertilio {Vesperides) noctivagans, Coues and Yarrow, G-eog. and 

 Geolog. Expl. and Surv. West 100th Merid., v, 1876, 95. 



Specific Characters. — Length 3; extent 12; tail 1.25 to 1.50; shin 50; 

 arm 1.50; longest finger 2.75; ear .50; tragus about .16. Molars |-:f (only 

 species with 36 as the total number) ; central upper incisors bicuspid. 

 Skull flat ; not crested ; two shallow depressions anteriorly. Base of foot 

 without the rounded lateral swelling of Vesperus. Tragus short, broad, 

 and blunt; hardly or not one-half as high as auricle. Ear irregularly 

 oval , inner border running upward and inward to level of head, then 

 upward and outward, ending obtusely ; outer border below folded irregu- 

 larly, bending inward so as to touch the tragus. Snout naked ; nostrils 

 wide apart ; opening sub-laterally ; space between emarginate. Fem- 

 oral membrane entirely, though scantily, furred on dorsal surface, with 

 numerous minute tufts arranged linearly on central surface. Thumb 

 small, slightly furry. Fur long and silky; black, or nearly so; the 

 ends of the hairs usually white or whitish, giving a peculiar powdery 

 aspect; sometimes entirely black. 



This species inhabits North America at large. It is said to be related 

 to V. discolor, of Europe. Its dentition and peculiar coloration charac- 

 terize it distinctly. Mr. J. A. Allen gives it as common in Massachu- 

 setts; Dr. Allen limits, it to the middle regions of North America. Like 

 most of the family, however, it is doubtless of general and extensive 

 distribution. 



Vesfeetilio (Vespeeus) fdscus Beauvois. 

 Carolina Brown Bat. 



1796. Vespertilio fuscus, Palisot de Beauvois, Cat. Peale's Mus., 1796, 14.—. 

 LeConte, Proc. Phil. Acad., 1855, 434. — Jordan, Man. Vert., 

 1878, 23. 



