36 



In 1884 tne genus Oryzomys was ranked as a subgenus 

 of " Hesperomys," with 2 species, one of which was the 

 Rice-field Mouse (0. palustris) of the Southern States, 

 and the other a Mexican and Central American species 

 (0. couesi). The number has since been increased by the 

 addition of one species and two subspecies from the United 

 States, and 6 species from Mexico and Central America. 1 



The Grasshopper Mice, genus Onychomys, likewise 

 merged in Hesperomys in 1884, and numbering only 2 

 species, now stands as a full genus with 8 species and 1 

 subspecies. 2 



Sigmodon hispidus toltecus (De Saussure). Revived by Allen, ibid., p. 207, 

 Southern Mexico, South to Costa Rica. 



Sigmodon hispidus arizonce Mearns, ibid., II., p. 287, Feb., 1890. Fort 

 Verde, Arizona. 



Sigmodon fulviv enter Allen, ibid., II., p. 180, Oct., 1889. Zacatecas, 

 Mexico. 



1 Oryzomys palustris (Harlan). South Atlantic States. 



Oryzomys pahtstris natator Chapman, Bull. Am. Mus. Nat. Hist.,V., p. 44, 

 March, 1893. Florida and Gulf Coast. 



Oryzomys palustris texensis Allen, ibid., VI., p. 177, May, 1894. Coast of 

 Texas. 



Oryzomys aquaticus Allen, ibid., III., p. 289, June, 1891. Cameron Co. 

 Texas. 



Oryzomys talamancce Allen, Proc. U. S. Nat. Mus., XIV., 1891, p. 193. 

 Costa Rica. 



Oryzomys alfaroi Allen, -Bull. Am. Mus. Nat. Hist., III., p. 214, April, 1891. 

 Costa Rica. 



Oryzomys costaricensis Allen, ibid., V., p. 239, Sept., 1893, Costa Rica. 



Oryzomys couesi (Alston). See Thomas, Ann. and Mag. Nat. Hist. (6), XL, 

 1893, p. 403. 



Oryzomys fulgens Thomas, ibid., p. 403, Mexico. 



Oryzomys melanotis Thomas, ibid., p. 404. Mineral San Sebastian, Jalisco, 

 Mexico. 



2 Onychomys leucogaster (Wied). Upper Missouri. 



Onychomys leucogaster brevicaudus Merriam, N. Am. Fauna, No. 5, p. 52 

 July, 1891. Idaho. 



Onychomys longipes Merriam, ibid., No. 2, p. I, Oct., 1889, Texas. 



Onychomys longicaudus Merriam, ibid. , p, 2. St. George, Utah. 



Onychomys melanophrys Merriam, ibid., p. 2, and No. 3, pp. 61, 62. Kanab. 

 Utah. 



