116 Mr. 0. Thomas on Mammals from 



XIII. — On Mammals from near Tinogasta, Catamarca, 

 collected by Sr. Budin. By Oldfield Thomas. 



(Published by permission of the Trustees of the British Museum.) 



DURING December and January Sr. Budin made a collection 

 in a hilly district known as La Puntilla, near Tiuogasta, 

 Catamarca. La Puntilla would appear to be a few miles out 

 from Tinogasta towards Copacabana, at an altitude of about 

 1000 metres. 



The collection is not a large one, as the place did not prove 

 very favourable for general collecting ; but among the eight 

 species of which it consists not only is there a new tuco-tuco, 

 but representatives of a highly remarkable new genus of 

 Octodonts related to Aconcemys, of which it seems to be a 

 non-fossorial ally with a strong external resemblance to 

 Octodontomys. This is a very striking discovery, and one of 

 which Sr. Budin may well be proud, adding as it does a 

 distinct new type to so peculiar a group. 



In spite of the ants, which, as usual in summer collecting, 

 formed a terrible plague, the specimens sent are all beauti- 

 fully prepared, and form a valuable addition to the National 

 Collection. 



1. Hesperomys muscidinus, Thos. 

 <?. 856; ?. 835, 893. 



2. Hesperomys murillus cordovensis, Thos. 



(J. 876,892. 



The determinations of the specimens of Hesperomys are 

 very doubtful, and must await further material for revision. 

 Female examples showing the number of mammae are 

 especially desirable. 



" Caught among the piles of branches in the cultivated 

 fields." 



3. Graomys caehinus, All. 



<J . 833, 837, 840, 842, 846, 851, 857, 861, 862, 865, 883, 

 884, 886, 894, 899. 



? . 853, 854, 858, 866, 869, 872, 873, 875, 889, 895, 896, 

 898. 



In marked contrast to the state of things at Chumbicha 



