A MONOGRAPH OF THE BATS OF NORTH AMERICA. 



41 



Milli- 

 Fifth (lisit: inettTs. 



Length of tiftli metacarpal l)one 35 



Length of fir.st phalanx 12 



Length of second phalanx 9 



Length of thigh 16 



Length of tibia 20 



Length of foot 10 



Length of tail 27 



Measurcmvnta from first edition of Moitoyrajjh. * 



Macrotus hullerl H. Allen. — The following' description of a Mexican 

 species of Macrotus may prove to be of value in studying A[. califor- 

 nieus, and is therefore introduced at this place. The original can be 

 found in the proceedings of the American Philosophical Society, 1890, 

 Vol. XXVIII, p. 72. 



In Article XVI, extracted from the Bulletin of the American Museum 

 of Natural History, Vol. ii, No. 3, p. 100, entitled '• Notes on a collec- 

 tion of Mammals from Southern Mexico," by Dr. J. A. Allen, occurs 

 the following statement : 



Macrotun cdlifornicus, Baird. — Eight skins and skulls and three additional skulls, 

 all males. Bolanos, .Jalisco, July 3, 1889. "Occurs in immense numbers in the 

 adits and old mine drifts of the Mineral de Bolanes. Of the fourteen captured all 

 were males, whereas in the case of the other kinds of bats taken here females gen- 

 erally predominate." (Audley Buller, MS. notes.) 



In the absence of specimens for comparison, it is difficult to say certainly 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 Dr. Allen of examin- 

 ing two of the specimens of this series, and concurred with this au- 

 thority in considering them to be identical with 21. californiciis. The 

 skins were of immature individuals and the parts about the auricle ap- 

 parently mutilated. The hair was furnished with dark cinereous tips, 

 a character which, while in striking contrast with the more northern 

 form of the species, was not thought to be distinctive for southern ex- 

 amples of other species, as Arfihnis perspieillatu.s and Aitdapha nove- 

 horacensiH are differently colored from northern indi\ idual.s. The main 

 measurements were the same. But since Dr. Allen published his 



* See I 're face. 



