78 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Genus Rhipidom/ys Tschudi, p. 87. The Central American 
vesper rats are now distinguished as : 
Genus NYCTOMYS Saussure. 
1860. Nyctomys Saussure, Revue ut magasin de zoologie, 
2d ser., xii, p. 106. March, 1860. 
1902. Nyctomys Bangs, Bull. mus. comp, zool., xxxix, p. 30. 
April, 1902. 
Type. — Hesperoyny s sumichrasti Saussure. 
Hkipulomys decolorus True, p. 88, now stands as : 
Nyctomys decolorus (True). 
1902. N [yctomys~\ decolorus Bangs, Bull. mus. comp, zool., 
xxxix, p. 30. 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. 
Jxhipidomys sumichrasti (Saussure), p. 88, is now : 
Nyctomys sumichrasti (Saussure). 
1902. N[yctomys] sumichrasti B angs, Bull. mus. comp, zool., 
xxxix, p. 30. April, 1902. 
Genus OTOTYLOMYS Merriam. 
1901. Ototylomys Merriam, Proc. Washington acad. sci., iii, 
p. 561. November 29, 1901. Type.— Ototylomys phyllotis 
Merriam. 
53. Ototylomys phyllotis Merriam. 
1901. Ototylomys phyllotis Merriam, Proc. Washington 
acad. sci., iii, p. 562. November 29, 1901. 
Type locality. — Tunkas, Yucatan. 
54. Ototylomys phyllotis phaeus Merriam. 
1901. Ototylomys phyllotis phaeus Merriam, Proc. Wash¬ 
ington acad. sci., iii, p. 563. November 29, 1901. 
Type locality. — Apazote, near Yohaltun, State of Campeche, 
Mexico. 
