A MONOGRAPH OF THE BATS OF NORTH AMERICA. 123 



genns Avliicli in this essay will receive the name of Adelonyeteris. But 

 Teniinin(;k's figure does uot harmouize with his statement; the ar- 

 rani>ement of tiie digital nerves in the fourth interspace of the wing 

 membrane being i)rccisely that of YcsperiiUo; the lips are whiskered, 

 the tragus erect and subulate as in the American species. Neverthe- 

 less Temminck was followed by Maj. Leconte, myself, and Dobson; 

 and so it came about that YesperiUio carolinensis Geofif. up to the date 

 of the present -writing has been considered to be not a species of Vcs- 

 pertilio but one of the genus having less than three premolars in each 

 jaw. It is evident that these statements are less substantiated by facts 

 than are those of Geoffroy and Desmarest. Unfortunately the skull as 

 figured by Geoffroy is that of a vesperugan species, while his descrip- 

 tion is of a vespertilionine species. Can we conclude that the correct 

 figure isdraAvn, and that both Geofltroy and Desmarest were in error in 

 claiming that a resemblance exists between Y. caroJincnsis and a spe- 

 cies of Yespertiliof I think the conclusion last drawn is the correct 

 one, and I infer that a bat with two premolars in the upper jaw was 

 known to Geoffroy inhabiting the United States near Charlestown, 

 S. C. This being assumed I note that the tragus, while of the same 

 shape and relative size as in Y. murinus, is yet half heart shape (demi- 

 ccpur), which, while not accurate for a Korth American Yespernf/o, is 

 not directly misleading. The tips of the hair of the belly are certainly 

 yellow, and Y. georgianus of Leconte is the only one in which they are 

 so. The face is also shorter and relatively broader than in T'. mnrimis. 

 So serious is the discrepancy between the description of T". carolinensis 

 of Temminck and his figure that his account must bejiut aside. 



I conclude that the Yespertilio georgknms of Maj. Leconte, Scoto- 

 phUus georgianuH^ of my Monograph of 18()4, and the Yesperugo georgi- 

 anus of subsequent writers, must be considered synonyms of Yespertilio 

 carolinensis Geoff., and that the name georgianns'Fv. Cuviermust be put 

 aside and that of carolinensis substituted therefor. 



Concerning Yespertilio erythrodactglns Temminck, it may be said 

 that while one false molar only is stated to be in the upper jaw, the 

 entire number of molars is given as five. The membranes are black, 

 but the base of the fingers and tlie "interdigital membrane of the first 

 finger" are red. The tragus is subulate (en feule de saule); the fur is 

 light red brown above (base of tail well covered), lighter shades of the 

 same i)redominating below. Length of head body, V.6'" to 2'"; tail, 

 I'A"; forearm, 1".2"'; expanse, 7".0"' to 8. The .specimens upon 

 which the above description is based were collected in the neighbor- 

 hood of ]'hi]adelphia. On the whole, Y. eri/throtlactj/Jns, other than in 

 the red color of the base of the fingers and the length of the forearm, 

 bears a close resemblanceto Yesperugo carolinensis. It is well to state 

 that Maj. Leconte {I. c.) has failed to identify V. crythrodactglus. 



Diagnosis. — ^Membranes of a dark brown color; hair chestnut brown 

 mixed with paler shades; the thigh is hairy throughout; the ear is as 



