100 * :Mr. O. Thomas OM 



)iot meiitionetl, and the characters of the incisors and niolar.s 

 are not referred to. 



4. Felis yngxiarondi, Desm. 



? . 060. Villa Carolina. .')()0 m. 



A Hue fully adult female of the normal grey-brown colonr. 



This is a valuable accession, as the Museum collection of 

 these variable cats is very imperfect and much needs sujiple- 

 menting. I have loner had ati impression that the Jaguaroiuii 

 and the Eyra 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. ei/ra,^^ and the two occur more or less 

 throughout the same area. So far, however, every author 

 has considered them distinct — as, iiuke 1, they a|)pear, — ami 

 without better material I do not like definitely to assert their 

 identity. 



5. ^ftls muscuJus, L. 

 J . 547, 548, 556. Jujuy. 125^ m. 



6. Holochilus halnearum, Thos. 



o^. 615, 622, 62a, 626, 627, 675, 687, 602, 605,600; 

 ?. 610, 618, 621, 628, 629, 637, 6:38, 645, 561, 654, 655, 

 671, 674, 676, 677, 684. Villa Carolina. Alt. 500 m. 



" llatun Nutria. Inhabits the banks of the river." — E. />'. 



I provisionally use for this "otter-rat" the name I gave 

 in 1006 to one sent from Tucuman by Signor Uiiielli. liut 

 in this genus the local differences are so slight and inconst;int, 

 and the langes of these animals are probably, as in other 

 river-animal^:, so great, that it is doubtful if even the lew 

 species that have been described are all valid. 



7. Iltsperomys venustu.t, Thos. 



cJ. 572, 582, 587, 597 ; $.601. Jujuy. 1258 m. 



S . 610, 6:50, 6;U, 646, 647, 649, 653, 6-s2, {]6C^ ; ? . 61 1, 

 633, 641, 642, 652, 656, 650, 678, 670, 088, 60^, 707, 700, 

 711. Villa Carolina. 500 m. 



8. Ilesperomys muscuHnus cortensis, subsp. n. 



(J . 546, 564, 567, 577, 578, 508, 602 ; ? . 553, 573, 579, 

 586, 500, 600, 601, 607. Jujuy. 1258 m. 

 " Caught in sir.iw-yard." — F. B. 



