On new Members of Heteromys and Neotoma, = 233 
XXXIX.—On Two new Members of the Genus Heteromys 
and Two of Neotoma. By OLDFIELD ‘l'HOMAS. 
In the April number of the ‘ Annals’ * I had the pleasure of 
describing two new pocket-mice of the genus Heteromys from 
Mexico and Guatemala, one of them, /7/. Salvin, representing 
a new annectant group distinguished by the characters 
presented by the soles of the hind feet. ‘T’o this species, 
Hi, Salvini, besides the type from Dueiias, Guatemala, a 
second specimen from Costa Rica was doubtfully referred. 
The Museum has now received from Dr. A. C. Buller, the 
discoverer of the Mexican species previously described, another 
- pocket-mouse from a different locality in Jalisco, and this 
proves also to belong to the group of which “4. Salvini is 
typical, and agrees closely with it in size and cranial cha- 
racters, but differs considerably in colour. 
On comparing this new specimen with the other two from 
Guatemala and Costa Rica, it is evident that it represents a 
new species of this group, while at the same time a more 
detailed examination shows that the Costa-Rican animal 
ought itself to be separated, at least subspecitically, from the 
Guatemalan. 
Heteromys pictus, sp. n. 
Size about as in FZ. Salvint. Colour above coarsely 
grizzled rutous, the usual black-tipped spines being profusely 
mixed both on head and body with coarse orange-tipped 
hairs ; sides brighter rufous, the junction between the dorsal 
and ventral colours being marked, especially anteriorly, with 
a bright orange-rufous line, far richer than in any other 
species. Kars black with white edges. Fore limbs wholly 
white, except that there is an inconspicuous patch of grey 
outside the elbow. Hind limbs white on their inner sides and 
on the top of the feet, dusky on their outer and hinder sides, 
this colour passing down on to the hairy part of the soles of 
the feet. Soles hairy for about one third the total length of 
the foot ; the naked part with six pads as in H. Salvin, but 
the minute fifth one is situated rather further forwards, half- 
way between the fourth and sixth. ‘ail sharply bicolor, 
blackish above, white beneath. 
* Ann. & Mag. Nat. Hist. (6) xi. p. 329 (1898). 
Ann. & Mag. N. Hist. Ser. 6. Vol. xii. 18 
