182 Allen — Generic JVames of ChincMllid<f=. 



case, however, is different with CdUomijs D'Orbigny and Geof- 

 froy Saint-Hi laire mentioned above. 



The authors of this genus included in it three species only, 

 namely, Callomys viscaccia, Callomys laniger, and Ccdlomys 

 aureus. The first had already been assigned to the genus Ms- 

 caccia by Schinz, and upon the second the name CldnchiUa had 

 been bestowed by Brooks. This leaves the Callomys aureus 

 only for consideration. Callomys aureus is based on furrier's 

 skins, lacking the feet, the ears and the tail, and, of course, the 

 skull; consequently the species may be treated as indetermina- 

 ble and consequently Callomys is indeterminable. Waterhouse 

 and others have considered Callomys aurexis as referable to the 

 genus Lagidium, but it would seem an unwarranted jjroceeding 

 to displace Lagidium with the name Callomys on the basis of a 

 species so imperfectly described as C. aureus. It hence seems 

 proper to recognize for the three genera of the Chinchillidm the 

 names Viscaccia., Chinchilla, and Lagidimn. 



