254 On new Neotropical Mammals. 
This Lligmodontia is clearly the Bolivian representative of 
£, callosa, Rengg., from which it differs by its rather smaller 
teeth and more buffy under surface. 
“ Phyllotis ” sublimis and the Species of Reithrodon 
and Kuneomys. 
A further examination of the peculiar mouse recently 
described as Phyllotis sublimis* shows that the incisors, 
although practically ungrooved in the type, are indistinctly 
grooved in younger specimens. ‘The grooving is very faint, 
but not fainter than is often the case in specimens of Lezthro- 
don pictus, to whose neizhbourhood I now think Phyllotis 
sublimts should be tiansterred. Viewed as a Phyllotis, the 
species always appeared anomalous, and the incisors have 
evidently now given a proper indication of its affinities ; for 
its relationship in essential characters to Retthrodon pictus 
is quite clear, greatly as it differs in size and other specific 
marks. 
But in transferring the species the question of the division 
of “ Leithrodon”’ into two has been again examined, and I 
now think, especially since the removal of Sigmomys Alstont T, 
that Coues’s suggestion{t as to the breaking up of Water- 
house’s genus into Letthrodon and Huneomys should be 
adopted, the two groups differing markedly in both cranial 
and dental structure. ‘The wide difference in the formation 
of the last upper molar is especially noteworthy. 
The species of South-American groove-toothed Muride 
would then be allocated as follows :— 
I. Rerruropon, Waterhouse. 
Species: L. cuniculoides, Waterh. 
E. typicus, Waterh. 
II]. Eunromys, Coues. 
Species: LH. chinchilloides, Waterh. 
E. pictus, Thos. 
Li. sublimis, ‘Thos. 
Li. fossor, Vhos. 
III. Stamomys, Thos. 
Species: S. Alston, Thos. 
S. savannarum, Thos. 
* Ann. & Mag. Nat. Hist. (7) vi. p. 467 (1900). 
+ Op. cit. viii. p. 150 (1901). 
{ Proc. Acad. Philad. 1874, p. 185. 
