40 PEOCEEDINGS OF THE NATIONAL MUSKUM. voi . O:? 



Chinchillidae. 

 Lagidium peruanum. 



Gyropus alpinus Kellogg and Nakayama. (Peru.) 

 Lagotis cuvieri. 



Oyropus lagotis Gervais." (Chile.) 



Da S YPROCTIDAE. 



Dasyprocta agouti. 



AUogyropus amplaxans (Neumann). (Brazil.) 

 Oliricola (?) JongicoUis (Nitzsch). 



MUKIDAE. 



Oryzomys, species. 



Protogyropus normalis Ewing.' (Argentina.) 



OCTODONTIDAE. 



Abrocoma bennetti. 



Moiiogyropi(s longus (Neumann). (Chile.) 

 Abrocoma, species. 



Monogyroptis longus (Neumann). (Chile.) 

 Ctenomys colburni. 



Mori'Ogyropns parvus Ewing. (Argentina.) 



Gyropus latipolUcaris Ewing. (Argentina.) 



Gyropus gracilipes Ewing. (Argentina.) 

 Ctenomys opimus. 



Gyropus forficulatus Neumann. (Bolivia.) 

 Ctenomys osgoodi. 



Gyropus pollicaris Ewing. (Argentina.) 



Gyropus latipolUcaris Ewing. (Argentina, Chile.) 

 Ctenomys sericeus. 



Monogyropus jmrvvs Ewing. (Argentina.) 

 Ctenomys, species. 



Gyropus wetmorei Ewing. (Argentina.) 

 Ctenomys, species. 



Gyropus forficulatus Neumann. (Argentina.) 

 Dactylomys amblyonx. 



Gliricola decuratus (Neumann).* (Brazil.) 

 Hoplomys gymniirus. 



Tetragi/ropus setifer Ewing. (Ecuador.) 

 Proechimys mincae. 



Tetragyropus lineatiis (Neumai\n). (Colombia.) 

 Proechimys securus, 



AUogyropus setosus (Neumann). 



SCIUEIDAE. 



Arctomys marmotta. 



AUogyropus turhinatus (Piaget). (Europe.) 



- This species is included in tlie subfamily Cryropinac, but its generic afSnities may 

 not be with the genus Qpropus Nitzsch. 



3 Straggler (?). 



* This si)ecies may belong to the genus Paragliricola Ewing. Only further study will 

 tell. 



