180 BULLETIN 79, UNITED STATES NATIONAL MUSEUM. 



Ototylomys guatemalae Thomas. 



1909. Ototylomys guatemalx Thomas, Abstr. Proc. Zool. Soc. 



London, p. 32. June 22, 1909. 

 Type Locality. — Tucuru, Polochie River, about 50 miles east 

 of Coban, Guatemala. 



t*Ototylomys phyllotis phyllotis Merriam. 



1901. Ototylomys phyllotis Merriam, Proc. Washington Acad. 



Sci., vol. 3, p. 562. November 29, 1901. 

 Type Locality. — Tunkas, Yucatan. 



t* Ototylomys phyllotis phaeus Merriam. 



1901. Ototylomys phyllotis phseus Merriam, Proc. Washington 

 Acad. Sci., vol. 3, p. 563. November 29, 1901. 



Type Locality. — Apazote, near Yohaltun, State of Campeche, 

 Mexico. 



Genus NECTOMYS Peters. 



1861. Nectomys Peters, Abhandl. k. preuss Akad. Wissensch. 

 Berlin, 1860, p. 151. Type, Mus squamipes Lichtenstein. 



Nectomys dimidiatus Thomas. 



1905. Nectomys dimidiatus Thomas, Ann. and Mag. Nat. Hist., 

 ser. 7, vol. 15, p. 586. June, 1905. 



Type Locality. — Escondido River, 7 miles below Rama, 

 Nicaragua. 



Genus RHEOMYS Thomas. 



1906. Rheomys Thomas, Ann. and Mag. Nat. Hist., ser. 7, 

 vol. 18, p. 421. April, 1906. Type, Rheomys underwoodi 

 Thomas. 



Rheomys underwoodi Thomas. 



1906. Rheomys underwoodi Thomas, Ann. and Mag. Nat. Hist., 



ser. 7, vol. 17, p. 422. April, 1906. 

 Type Locality. — ^Tres Rios, Costa Rica. 



Genus NYCTOMYS Saussure. 



1860. Nyctomys Saussure, Revue et magasin de zoologie, ser. 2, 

 vol. 12, p. 106. March, 1860. Type, Hesperomys sumichrasti 

 Saussure. 



1902. Nyctomys Bangs, Bull. Mus. Comp. Zool., vol. 39, p. 30. 

 April, 1902. 



