78 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



Genus Rhipidomys Tschudi, p. ST. The Central American 

 vesper rats are now distinguished as : 



Genus NYCTOMYS Saussure. 



1860. Nyctomys Saussure, Revue et magasin de zoologie, 



2d ser., xn, p. 100. March, 1860. 

 1902. Nyctomys Bangs, Bull. mus. comp. zool., xxxix, p. 30. 



April, 1902. 

 Type. — Ilesperomys sum ichrasti Saussure. 



Rhipidomys decolorus True, p. 88, now stands as : 

 Nyctomys decolorus (True). 



1902. N[yctomys~\ decolorus Bangs, Bull. mus. comp. zool., 

 xxxix, p. 80. April, 1902. 



52. Nyctomys nitellinus Bangs. 



1902. Nyctomys nitellinus Bangs, Bull. mus. comp. zool., 



xxxix, p. 30. April, 1902. 

 Type locality. — Boquete, Chiriqui, Panama. Altitude, 4000 

 feet. 



Rhipidomys sumichrasti (Saussure), p. 88, is now : 

 Nyctomys sumichrasti (Saussure). 



1902. N\jyctomys~\ sumichrasti Bangs, Bull. mus. comp. zool., 

 xxxix. p. 30. April, 1902. 



Genus OTOTYLOMYS Merriam. 



1901. Ototylomys Merriam, Proc. Washington acad. sci., in, 

 p. 561. November 29, 1901. Type. — Ototylomys phyllotis 

 Merriam. 



53. Ototylomys phyllotis Merriam. 



1901. Ototylomys phyllotis Merriam, Proc. Washington 



acad. sci., in, p. 562. November 29, 1901. 

 Type locality. — Tunkas, Yucatan. 



54. Ototylomys phyllotis phaeus Merriam. 



1901. Ototylomys phyllotis phaeus Merriam, Proc. Wash- 

 ington acad. sci., in, p. 503. November 29, 1901. 



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

 Mexico. 



