Allen.] 72 [March 21, 



Measurements. 



Length of head and body 180 min. 



" head ' 43 " 



" thumb 40 " 



" second m. c 47 " 



" third " 67 " 



" fourth " 67 " 



" fifth " 73 " 



" forearm 98 " 



" tibia 48 " 



Habitat, Samoa islands. Type in Ward's Nat. Hist. Establishment, 

 Rochester, New York.* 



Description of a New Species of Macrotus. By Harrison Allen. 

 (Read before the American Philosophical Society, March 21, 1890.) 



In Article xvi, extracted from "The Bulletin of the Am. Mus. Nat. 

 Hist.," Yol.ii, No. 3, p. 166, entitled "Notes on a Collection of Mammals 

 from Southern Mexico," by Mr. J. A. Allen, occurs the following state- 

 ment : "Macrotus Californicus, Baird. Eight skins and skulls, and three 

 additional skulls, all males. Boianos, Jalisco, July 3, 1889. ' Occurs in 

 immense numbers in the adits and old mine drifts of the Mineral de JBo- 

 lanos. Of the fourteen captured all were males, whereas in the case of 

 the other kinds of bats taken here females generally predominate ' ( Audley 

 Buller, MS. notes). 



"In the absence of specimens for comparison, it is difficult to say cer- 

 tainly, whether they are the same as the California specimens. Judging 

 by descriptions, they are somewhat darker in color." 



I had an opportunity, through the courtesy of Mr. J. A. Allen, of 

 examining two of the specimens of this series, and concurred with Mr. 

 Allen in identifying them as M. californicus. The skins were of imma- 

 ture individuals and the parts about the auricle apparently mutilated. 

 The dark cinereous tips of the hair, while in striking contrast with the more 

 northern form of the species, was not thought to le distinctive, since 

 southern variations of other species, as Artibeus perspicillatus and Atala- 

 pha noveboracensis, are known to be differently colored from the northern. 

 The main measurements were the same. But since Mr. Allen published 

 his notes I have carefully soaked one of the skins in dilute spirits and 

 have detected that the apparent mutilations of the auricle were due to 

 distortion, and that the form of the auricle was sufficiently pronounced to 

 warrant a careful examination of the cranium. In response to my request 



I am indebted to Mr. F. A. Ward for an opportunity of examining this interesting 

 form. 



