new Neotropical Mammals. 253 
Dimensions of the type (measured in the flesh) :— 
_ Head and body 131 millim.; tail 130; hind foot, s. u. 27, 
c. u. 28°5; ear 18. 
Skull: tip of nasals to front of interparietal 28°5; zygo- 
matic breadth 16°4; nasals 12°5 x 3:5; interorbital breadth 5 ; 
diastema 8-9; palatal foramina 4°7x 2°5; length of molar 
series 4:2. 
Hab. Panama (City of). “Trapped in yucca cultivation 
near open Savanna.” 
Type. Female. B.M. no. 0. 5. 1. 67. Collected 25th 
February, 1899, by E. André. 
This species is most like O. velutinus, but may be distin- 
guished by its brighter fulvous-tawny colour. The other 
members of the group are more brown or rufous. 
Eligmodontia callosa bolivie, subsp. n. 
General colour above mouse-grey, more or less washed 
with dull yellowish, which latter colour varies in intensity in 
the different specimens, and is most marked on the rump. 
Sides more buffy, an indistinct buffy line edging the belly. 
Under surface uniform pale buffy, not sharply defined, the 
hairs slaty basally. Centre of face like back, cheeks like 
sides. ars of medium size, thinly haired, greyish, not or 
scarcely darker than the body; the usual whitish postauri- 
cular spot less developed than in other members of the group. 
Arms and legs greyish white, hands and feet clear buffy white. 
Tail very finely scaled, closely and finely haired, brown 
above, whiter below. 
Skull very like that of the typical form, with the same 
evenly divergent, well-marked, supraorbital ridges, long 
palatal foramina, and other details. Molars smaller and 
lighter throughout. — 
Dimensions of the type (measured in the flesh) :— 
Head and body 106 millim. ; tail 82; hind foot (s. u.) 21; 
ear 19. 
Skull: greatest length 28°8 ; basilar length 22:2; greatest 
breadth 14:6; nasals 11°8x3°7; interorbital breadth 3:6; 
diastema :7'4.; palatal foramina 6°6x 2°2; length of upper 
molar series 41. 
Hab. Rio Solocame, 67° W., 16°S. Bolivia. Altitude 
1200 m. Other specimens from Yungas, 1500 m., and 
Astillero, 2700 m. 
Type. Male. B.M. no. 1. 6. 7. 438. Original number 
1325. Collected 24th January, 1901, by P. O. Simons. 
Five specimens examined. 
