94 ZOOLOGY. 



VESPERTILIO (VESPEEUGO) GEORGIANUS, F. Guv. 



{■Jeorgiaim ESat. 



Vespcrlilio georgianus, F. Guv., Ann. Mus., 1S32, IG. — LeC, Proc. Acad. Nat. Sci. 



Phila., 1S55, L'Sfi. — Wagn., Suppl. Sehreb., i, 1855, 750. 

 Scotophilia georgianus, Allen, Monog., 35. 

 ? Vcupertilio monticola, Bachman, Proc. Acad. Nat. Sci. Phila., 1841, 02. 



ChAES. — Molars, ~ ' - ; 34 teeth in all. Upper incisors all of about equal size, tbe 



«_) — o 



central pair bicuspid. Skull small, papery, not so flat as iu the species of Yesperus. 

 Base of foot without rounded swelling of Yesperus. Tragus slender, erect, half as 

 high as auricle. Ear nearly naked, subelliptical, slightly convex on the inner, nearly 

 straight on the outer, border, which terminates near the mouth in a wart. Nose flat, 

 broad, naked; nostrils small, oblique, sublateral. Point of tail exserted ; femoral 

 membrane ou dorsal surface furred about one-third, on ventral surface with 

 numerous small tu'.ts of fur arranged transversely. Wing-membranes reaching base 

 of toes, luricd a little distance from the, body on the anterior surface. Base of fur 

 everywhere dark plumbeous; ■end on upper parts dark rufous brown, on lower parts 

 brighter. Small; length about 3 inches ; tail, H ; extent, 8A-0 ; } ; arm, 1|-1J; shin, I ; 

 longest finger, 2£; ear, \-\. 



Hab. — Maine and Missouri to Texas. 



This species is readily distinguished from its subgeneric allies by the 

 slender erect tragus and very partially furred femoral membrane as com- 

 pared with V. noctivagans; and bicuspid central incisors as compared with 

 S. hesperus. The physiognomy rather approaches that peculiar to Vespertilio 

 proper. The original imperfect diagnosis of " V. georgianus" has been 

 shown by LeConte and Dr. Allen to be applicable here. The species is 

 apparently most frequent in the Middle and Southern States, but has been 

 reported from the northern and western points above mentioned. 



VESPERTILIO (VESPEEUGO) HESPERUS, (Allen) Goues. 

 The Western Bat. 



Syn. — SeolopMlvs hesperus, Allen, Monog., 43. 



Giiaks. — Molars, 0-0 ; 34 teeth in all; dentition as in Y. georgianus, but cen- 

 5-5 



tral upper incisors unicuspid. Skull tlat and broad. Base of foot without rounded 



swelling of Yesperus. Tragus short, blunt, curved hardly or not half as high as auricle. 



Point of tail not exserted. Interfemoral membrane ample, with a small calcaneal lobe, 



its dorsal surface only very partially furred, as in V. georgianus. Head small, tlat; 



face blunt, not hairy; body rather slender; size diminutive; length, 2$-2|; extent, 7; 



tail, 1 ; arm, 1-1£; linger, 1^—2; shin, J- ; thumb, J„; ear, £. Color above obscure dirty 



gray, with more or less brownish ; below lighter; fur except at tip dark plumbeous. 



Hab. — Southern California. 



