88 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
*Rhipidomys sumichrasti (Saussure). 
1861. Hesperomys sumichrasti Saussure, Revue et magasin 
de zoologie, ‘2d ser., xii, p. 107, 
1885. Hesperomys sumichrasti True, Proc. U. S. nat. mus., 
VII (1884), p. 598. 1885. 
1897. \^Iihipidomys'\ sumichrasti Trouessart, Catal. mamra., 
pt. Ill, p. 519. 
Type locality. — Eastern slope of mountains in State of Yera 
Cruz, Mexico. 
Rhipidomys decolorus True. 
1894. Sitomys (Hhipidomys) decolorus True, Proc. U. S. 
nat. mus., xvi, p. 689. February 5, 1894. 
1897. [Hhipidomys'] decolorus Trouessart, Catal. mamm., 
pt. Ill, p. 519. 
Type locality. — Rio de las Piedras, Honduras. 
Genus TYLOMYS Peters. 
1866. Tylomys Peters, Monatsber. k. preuss. Akad. Wissensch. 
Berlin, p. 404. Type. — Hesperomys ( Tylomys) nudicaudiis 
Peters. 
*^Tylomys nudicaudus (Peters). 
1866. Hesperomys ( Tylo^uys) nudicaudus Peters, Monats¬ 
ber. k. preuss. Akad. Wissensch. Berlin, p. 404, pi. 1, figs. 
1-4. 
1885. Hesperomys nudicaudus True, Proc. U. S. nat. mus.^, 
VII (1884), p. 598. 1885. 
1897. '^Tyloonys'] midicaudus Trouessart, Catal. mamrn., pt. 
Ill, p. 520. 
Type locality. — Guatemala. 
* Tylomys panamensis (Gray). 
1873. Neomys panamensis Gray, Ann. and mag. nat. hist., 
4th ser., xii, p. 417. 
1885. Hesperomys panamensis True, Proc. U. S. nat. mus., 
VII (1884), p. 598. 1885. 
