190 Mr. O. Thomas on 
not mentioned, and the characters of the incisors and molars 
are not referred to. 
4, Felis yaguarondi, Desm. 
?. 669. Villa Carclina. 500 m. 
A fine fully adult female of the normal grey-brown colour. 
This is a valuable accession, as the Museum collection of 
these variable cats is very imperfect and much needs supple- 
menting. Ihave long had an impression that the Jaguarondi 
and the Kyra may possibly represent but a single dimorphic 
species, as there seems little essential difference, other than 
colour, between the grey or brown “ F. yaguarondi”’ and the 
bright reddish ‘ F. eyra,’’ and the two occur more or less 
throughout the same area. So far, however, every author 
has considered them distinct—as, indeed, they appear,—and 
without better material I do not like definitely to assert their 
identity. 
5. Mus musculus, L. 
3. 547, 548, 556. Jujuy. 1258 m. 
6. Holochilus balnearum, Thos. 
3. 615, 622, 623, 626, 627, 675, 687, 692, 695, 699 ; 
@. 610, 618, 621, 628, 629, 637, 638, 645, 561, 654, 655, 
671, 674, 676, 677, 684. Villa Carolina. Alt. 500 m. 
“ Raton Nutria. Inhabits the-banks of the river.”—Z. B. 
I provisionally use for this ‘ otter-rat”’ the name I gave 
in 1906 to one sent from ‘Tucuman by Signor Dinelli. But 
in this genus the local differences are so slight and inconstant, 
and the ranges of these animals are probably, as in other 
river-animals, so greaty that it is doubtful if even the few 
species that have been described are all valid. 
7. Hesperomys venustus, Thos. 
&d. 572, 582,587,597; 2. 601. Jujay..; 1258 m. 
3. 619, 630, 634, 646, 647, 649, 653, 682, 686; 9. 611, 
633, 641, 642, 652, 656, 659, 678, 679, 688, 698, 707, 709, 
711. Villa Carolina. 500 m. 
8. Hesperomys musculinus cortensis, subsp. n. 
3. 546, 564, 567, 577, 578, 598,602; 2. 553, 573, 579, 
586, 599, 600, 604, 607. Jujuy. 1258 m. 
“ Caught in straw-yard.”—E. B, 
