600 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [16] j 



Family ZAPODID^. The Jumping-Mice. ' 



Zapus hudsonius, Coaes. 

 North America generally. 



Family OCTODOJS^TID^. 

 Capromys brachyurus. 



Jamaica. 

 Capromys prehensilis, Poeppig. 



Cuba. 

 Capromys melanurus, Poey. 



Cuba. 



Capromys pilorides, Say. 



Cuba. 

 Plagiodontia aedium, F. Cuvier. 

 Hayti aud Jamaica. 



Family HYSTRICID^. The Porcupines. 



Erethrizou dorsatus dorsatus, (Linnd) Allen. Canada Porcupine. 



New England and Ohio northwestward. 

 Erethrizon dorsatus episanthus, (Brandt) Allen. Western Porcupine. 



Central Californian and Sonoran Regions, northward into Alaska, 

 southward into Mexico. 



Synetheres mezicanus, (Kerr) Alston. 

 Mexico to Costa Rica. 



Family CAVIID^. Cavie«. 



Dasyprocta mexicaua, De Saussure. 



Mexico. 

 Dasyprocta cristata, (Geoffroy) Desmareet. 



West Indies. 

 Dasyprocta punctata, Gray. 



Mexico to Costa Rica. 



Dasyprocta isthmica, Alston. 

 Costa Rica and Panama. 



Coelogenys paca, (Linne; Tomes. 

 Mexico to Paraguay. 



Suborder Duplicidentata. 



Family LAGOMYID^. The Pikas. 



N Lagomys princeps, Richardson. North American Pika. 



Central and Californian Regions from the Rocky Mountains westward, 

 in the highest regions. 



