1915.] Allen, New South American Mammals. 633 
panse, 285.6 (275-294); total length, 98.5 (90-98); head and body, 49.3 (45-54); 
tail, 40.4 (88-43); foot, 8.2 (8-9); ear, 9.7 (9-10). Fore arm, type, 40; average of 
6 specimens, 39.7 (89-40). | 
Skull (type), total length, 15.7 (15)!; zygomatic breadth, 11.6 (10); interorbital 
breadth, 4 (3.4); breadth of braincase, 6.8 (7); maxillary toothrow, including canine, 
5.5 (5); palatal breadth from outside to outside of m3, 6.8 (6.2). 
The series of 6 specimens on which the present species is based are re- 
markably uniform in size and coloration, the length of the forearm varying 
only from 39 to 40 mm. (4 of them each 40 mm.), and the color variation 
consists mainly in the underparts being a little more strongly washed with 
buffy gray in some than in others. Compared with E. dorianus the colora- 
tion is closely similar but the forearm is 3 mm. shorter in dortanus, and the 
skull is much narrower relatively to the length and much smaller. 
With EF. hilarit it hardly needs comparison, it being much smaller, and 
lacking the fulvous tone of color seen in Ailarw; yet the skulls are quite 
similar. It is not closely related to Hptesicus diminutus Osgood, from Sao 
Marcello, Bahia. : 
Named for Dr. Frank M. Chapman, who has so ably planned and 
directed the Museum’s recent zodlogical work in South America. 
POSTSCRIPT. 
Since the foregoing pages were made up for press I have received for 
examination, through the kindness of Dr. Witmer Stone, Curator of the 
Academy of Natural Sciences of Philadelphia, the type of Cope’s Dasy- 
procta aurea, an adult skin, without skull, collected by Mr. H. H. Smith 
at Chapada, Matto Grosso, Brazil, December, 1833 (collector’s No. 293). 
This skin proves to be albinistic, not a white but a yellow albino, the pelage 
being everywhere deep yellow, mostly orange yellow on the upperparts, 
paler on the ventral surface; the long hairs on the rump are much paler 
than the rest of the dorsal surface, and paler basally than at the tips. None 
of the hairs are annulated, as in normal specimens of the genus. Before 
receiving the type of aurea I had referred to it a specimen collected by Leo 
E. Miller, during the Roosevelt Brazilian Expedition, at Urucum, about 
20 miles south of Curumb4, and about 300 miles southwest of Chapada. 
I believe it may be a normal specimen of Cope’s D. aurea, but it is impossible 
to decide the question at present, and probably impossible ever to determine. 
1 The measurements in parentheses are of an adult male skull of Eptesicus dorianus from 
Supacay, Paraguay. 
2 Amer. Nat., XXIII, p. 138, Feb. 1889. 
