246 Mr. O. Thomas on 
XXXIII.—New Neotropical Mammals, with a Note on the 
Species of Reithrodon. By OLprreLD THomas, F.R.S. 
Dasypterus ega and its subspecies. 
Examples of Dasypterus ega from the wide range of the 
species agree very closely in size and in the characters of 
the ears, skull, and teeth; but there is considerable variation 
in colour and of so distinctly geographical a nature that the 
different forms should evidently be recognized as subspecies. 
The Lower Californian form, D. e. wanthinus, has already 
been described *. 
Dasypterus ega panamensis, subsp. n. 
General colour dark brownish clay-colour, something 
between Ridgway’s ‘‘ raw amber” and “clay-colour.” Fur 
black basally, then dull brownish buffy, the extreme tips 
black. Centre of face similar to back, cheeks from eyes to 
lips contrasted black. Rump and hairy part of interfemoral 
verging towards brownish fulvous. Under surface similar to 
upper. 
Forearm 46°5 millim. 
Hab. Bogava, Chiriqui, Panama. Altitude 250 m. 
Type. Male. B.M. no.0.7.11.1. Collected 8th October, 
1698, by Mr. H. J. Watson. One specimen. 
Dasypterus ega fuscatus, subsp. n. 
Very similar to panamensis, but even darker, the fine black 
tips to the dorsal hairs more developed, so that the colour may 
be said to be washed or marbled with black. Crown and 
centre line of face blackish brown, much darker than the 
back ; cheeks and lips similar, not markedly darker. Inter- 
femoral not more fulvous than back. Under surface similar 
in its brownish tone to the back, but not black-washed, the 
hairs being without black tips. 
Forearm 47-48 millim. 
Hab. Rio Cauquete, Cauca River, Colombia. Altitude 
1000 m. 
Type. B.M. no. 99. 9. 6. 5. Collected 15th June, 1898, by 
J. H. Batty. Three specimens examined, all precisely alike. 
This subspecies differs from panamensis by its blackish 
face and more heavily black- washed back. 
* Ann. & Mag. N. H. (6) xx. p. 544 (1897). 
