37 



The very numerous group of Deer Mice, or White-footed 

 Mice, forming the restricted genus Sitomys (= subgenus 

 Vesperimus Coues), has of late received a large share of 

 attention, both from collectors and systematists. In 1884 

 probably the specimens in the museums did not exceed 

 700 or 800, of which only a small part would now be con- 

 sidered as available, or at least desirable, for scientific use, 

 while now probably 7,000 to 10,000 could be brought to- 

 gether if the specimens in the various public and private 

 collections in this country should be combined. The num- 

 ber of forms recognized in this particular group of mice in 

 1884 was 9 — 6 species and 3 subspecies. The number 

 now recorded is 37 — 21 species and 16 subspecies ; an in- 

 crease of about 300 per cent, in seven years. 1 I am more 



Onychomys melanophrys pallescens Merriam, ibid., No. 3, p. 61, Sept., 1890. 

 Apache Co., Arizona. 



Onychomys fuliginosus Merriam, ibid. , p. 59, Oct., 1890. Arizona. 



Onychomys ramona Rhoads, Am. Nat., Sept., T.893, p. 833. San Bernardino 

 Valley, Cal. 



Onychomys torridus (Coues). Arizona. 



1 The United States additions made prior to October, 1892, may be found 

 recorded in detail by Bryant in Zoe, III., pp. 212-214. Mexican and later 

 additions are included in the following full list : 



a. United States. 



Sitomys americanus (Kerr). 



Sitomys americanus canadensis Miller, Proc. Biol. Soc. Wash., VIII., p. 55, 

 June, 1893. Northern New England, northern New York, and northward. 



Sitomys americanus gossypinus (Le Conte). 



Sitomys americanus arcticus (Mearns). 



Sitomys americanus nebracensis (Baird). 



Sitomys americanus texanus (Woodhouse). 



Sitomys americanus rufinus (Merriam). 



Sitomys americanus austerus (Baird). 



Sitomys americanus gambe/i (Baird). Revived by Allen, Bull. Am. Mus. 

 Nat. Hist., V., 1893, p. 190. 



Sitomys americanus deserticolus (Mearns). 



Sitomys americanus sonoriensis (Le Conte). 



Sitomys americanus thurberi Allen, Bull. Am. Mus. Nat. Hist., V., p. 1S5, 

 August, 1893. Northern Lower California. 



