XOr.TH AMERICAN RECENT MAMMALS. 367 



Genus NECTOMYS Peters. 



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



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

 1897. Sigmodontomys Allen, Bulk Amer. Mus, Nat. Hist., vol. 9, 



p. 38. March 11, 1897. Type, Sigmodontomys alfari Allen. 



(See Goldman, Proc. Biol. Soc. Washington, vol. 29, p. 127. 



June 6, 1916.) 



Nectomys alfari alfari (Allen). 



1897. Sigmodontomys alfari Allen, Bulk Amer. Mus. Nat. Hist., 



vol. 9. p. 39. March 11, 1897. 

 1908. Oryzomys ocJiracevs Allen, Bulk Amer. Mus. Nat. Hist., 



vol. 24, p. 655. October 13, 1908. (Rio Grande, Nicaragua.) 

 1913. Nectomys alfari alfari Goldman, Smiths. Misc. Coll., vol. 



60, No. 22, p. 7. February 28, 1913. 

 Type Locality. — Jimenez, Costa Rica. Altitude 700 feet. 



t*Nectomys alfari efficaz Goldman. 



1913. Nectomys alfari efficax Goldman, Smiths. Misc. Coll., vol. 



60, No. 22, p. 7. February 28, 1913. 

 Type Locality. — Cana, eastern Panama. Altitude, 1,800 feet. 



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. Rheom.ys Thomas, Ann. and Mag. Nat. Hist., ser. 7, vol. 17, 

 p. 421. April, 1906. Type, Rheorays underv:oodi Thomas. 



t*Rheomys raptor Goldman. 



1912. Rlieomys raptor Goldman, Smiths. Misc. Coll., vol. 60, 



No. 2, p. 7. September 20, 1912. 

 Type Locality. — Near head of Rio Limon, Mount Pirri, eastern 



Panama. Altitude, 4,500 feet. 



Rheomys underwoodi Thomas. 



1906. Rheomys undervjoodi 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 sumicJirasti 

 Saussure. 



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

 April, 1902. 



