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 Tinogasta, 

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

 tiom 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 o£ 

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

 non-fossorial all}^ 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 muscnUnus, Thos. 

 c?. 856; ?. 835,893. 



2. Hesperomys murillus cordovensis, Thos. 



<?. 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 cachinus, All. 



S . 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 Chumbiclia 



