CH I ROPTERA—VESPERTILIONID^E— VESPERTILIO FDSOUS. JJ3 



Vespertilio ursinus, Temm., Mon. Mamm., ii, 1835, 235.— Wagn., Suppl. Sclireb., v, 

 1855, 750.— LeConte, Proc. Acad. Nat, Sci. Phila., 1855, 434. 



? Vespertilio gryphus, Fr. Cuv., Auu. Mus., i, 1837, 15.— Wagn., Suppl. Schreb., v, 

 1855, 749. 



Vespertilio enroll, LeConte (nee Temm.), Proc. Acad. Nat. Sci. Phila., 1855, 435. 



4-4 



Chaks.— Molars, — - ; the front upper one narrower than the rest, corresponding 



to the third one (last premolar) of Vespertilio proper : the two front lower ones smaller 



2-2 

 than the other three. Incisors, — ; the lateral upper pair much smaller than the 



o — o 



central pair. Base of foot with a rounded swelling. Tip of tail exserted. Wing- 

 membrane reaching base of toes. No extension of fur on the wing-membranes: leg- 

 membrane triangular, furred at basal fifth on upper side, elsewhere more or less per- 

 fectly naked. Ears moderate, leathery, furred J-J way up the back, turned more or 

 less outward, with convex inner and straight or slightly emarginate outer border, and 

 well-developed basal lobe; tragus nearly half as high as auricle, tip never pointed, 

 outer border notched near the base. Nostrils emarginate ; head flat. Hairs dark 

 plumbeous, or dark cinereous on the basal part, a variable shade of brown at the ends, 

 usually lighter on the under snrfaceof the body than ou the upper. Length, 3-4; tail, 

 alone, 1&-H ; extent, 10-12; longest finger, 2§-3; arm, li-2 ; shin, §-f ; ear, about 

 i bigh. 



Hab. — United States. 



Dr. Allen has noted three different styles of coloration in this species. 

 In one, the ends of the hairs are chestnut-brown above, grayish-white below ; 

 in another, olive-brown above, fawn-russet and whitish below ; in a third, 

 deep chestnut above, and scarcely lighter below ; while occasionally the 

 whole fur shows white tips (much as in case of A. cinerea). The same 

 author expresses the hesitation he felt in separating V. fuscus and carolinen- 

 sis, in reuniting which we have none, thus indorsing Mr. J. A. Allen's view. 



This species, the dentition of which prevents confusion with any other, 

 has been reported from various and widely-separated localities all over the 

 United States. Mr. Allen says it is " common " in Massachusetts. 



Several specimens were collected in Arizona in 1873. 





• 



Specimens. 







No. 



Name. 



Locality. 



Date. 



Collector. 



Remarks. 



49 



49 " 

 65S 

 611 





Rio Grande, Colo 



do 



June, 1S73 

 do 



H. W. Henshaw.. 

 do 





do 



do 



.do 



Apache, Ariz 



do 



Aug. 9, 1S73 

 Aug. 24, 1S73 



Dr. 0. Loew .... 

 H. \V. Henshaw.. 







Note. — Specimen 65S has the membrane much more transparent than the others. 



