102 Mearns — Names for Subspecies of Peromyscus maniculatus. 



Baird's Hesperomys sonoriensis nebrascensis* is a nomen nudum, though 

 it is evident from a comparison of the text and synonymy on pages 4(32 and 

 474 of his Mammals of North America that he at first intended to describe 

 this race as a form of sonoriensis, but that, later, he changed his opinion 

 respecting its validity or possibly omitted it through oversight ; but Coues 

 repeated the namef, and referred to specimens from Deer Creek, Nebraska, 

 giving measurements and a critical remark on coloration. The name will 

 therefore have to date from Coues. This Nebraskan form was redescribed 

 by Osgood as Peromyscus luteus.i 



The Hesperomys leucopus nebrascensis Mearns §, from Calf Creek, 

 Custer County, Montana, is subspecifically distinct from Hesperomys sono- 

 riensisv&r. nebrascensis Coues. from Deer Creek, Nebraska, and as it must 

 receive a new name, I propose osgoodi as a subspecific appellation. 



The synonymy of the three forms involved stands as follows: 



Peromyscus maniculatus borealis, new name. 



ARCTIC DEER MOUSE. 



Hesperomys leucopus arcticus Mearns, Bull. Am. Mus. Nat. Hist. N. Y., 

 II, 1890, p. 285 (not of Coues). Fort Simpson, Hudson's Bay Ter- 

 ritory, September 7th, R. Kennicott. 



Peromysriix maniculatus arcticus Osgood, N. Am. Fauna, No. 10, 1000, 

 p. 33. 



Peromyscus maniculatus nebrascensis (Coues). 



NEBRASKA DEER MOUSE. 



ILsperomys sonoriensis var. nebrascensis Baird, Mamni. N. Am., 1857, 



p. 402 (noun, i a win in). 

 Hesperomys sonoricnsisxav. nebrascensis ( !oues, Monogr. N. Am. Rodentia, 



1877, p. 70, synonymy under Hesperomys leucopus sonoriensis, p. 28 



(critical remark on coloration ), p. 80 ( mentions specimens from Deer 



Creek, Nebraska). 

 Peromyscus nebrascensis of authors (not of Mearns). 

 Peromyscus 1 ulcus Osgood, Proc. Biol. Soc. Washington, XVIII, 1005, 



p. 78 (Kennedy, Nebraska i. 

 Peromyscus maniculatus luteus Osgood, N. Am. Fauna, No. 28, 1909, 



p. 77. 



Peromyscus maniculatus osgoodi, new name. 

 BLACK-EARED DEER MOUSE. 

 Hesperomys leucopus nebrascensis Mearns, Bull. Am. Mus. Nat. Hist., 



N. Y. 1800, p. 285 (not Hesperomys sonoriensis var. nebrascensis 



Coues, 1877). Calf Creek, Custer County, Montana. 

 Peromyscus texanus nebrascensis Allen, Bull. Am. Mus. Nat. Mist., N. Y., 



VIII, 180(5, p. 251 (part). 

 Peromyscus maniculatus nebrascensis Osgood, N. Am. Fauna, No. 28, 



L909, p. 75 (based on Mearn s). 



* Maimn. N. Am.. ls.",7 . p. 462. 



I Monogr. X. Am. Rodentia. 1*77, pp. 28, 7;i and so. 



I Proc. Biol. Soc. Washington. 1905, p. 7s (Kennedy, Nebraska). 



§ Bull. Am. Mus. Nat. Hist., N. Y., 1890, p. 285. 



