MILLER AND REHN : NORTH AMERICAN MAMMALS. 89 



1897. [Tylomys] panamensis TROUESSART, Catal. mamm., 



pt. in, p. 520. 

 TYPE LOCALITY. Panama. 



Tylomys watsoni Thomas. 



1899. Tylomys watsoni THOMAS, Ann. and mag. nat. hist., 



7th ser., iv, p. 278. October, 1899. 



TYPE LOCALITY. Bogava, Chiriqui, N. W. Panama. Alti- 

 tude, 800 feet. 



Genus HOLOCHILUS Brandt. 



1885. Holochilus BRANDT, Mem. de 1'acad. imper. sci. St. 

 Petersbourg, 6th ser., i, p. 428. Type. Mus (Holochilus) 

 leucogaster BRANDT. 



* Holochilus pilorides (Pallas). 



1778. Mus pilorides PALLAS, Nov. spec, quadr. glir. ord., p. 

 91. 



1885. Hesperomys pilorides TRUE, Proc. U. S. nat. mus., vn 



(1884), p. 598. 1885. 

 1897. [Holochilus'] pilorides TROUESSABT, Catal. mamm., pt. 



in, p. 520. 

 TYPE LOCALITY. Island of Martinique, Lesser Antilles. 



Genus SIG-MODON Say and Ord. 



1825. Sigmodon SAY and ORD, Journ. acad. nat. sci. Phila., iv, 

 pt. n, p. 352. Type. Sigmodon hispidus SAY and ORD. 



Sigmodon borucae Allen. 



1897. Sigmodon borucae ALLEN, Bull. Amer. mus. nat. hist., 



ix, p. 40. March 11, 1897. 

 TYPE LOCALITY. Boruca, Costa Rica. 



