24 ■ - PROCEEDINGS OF THE ACADEMY OF [Jan., 



Thomomys fulvus (Wood house). 



1852. Geomys fulrus Woodhouse, Proc. Acad. Nat. Sci. Phila., VI, p. 201. 

 (San Francisco Mountain, Ariz.) 



Specimens of this form have been examined from Hale's Ranch, Lin- 

 coln county, and Las A'egas, San Miguel county, N. M., the latter col- 

 lected by Emerson Atkins and submitted by Prof. Cockerell. One 

 specimen from the latter locality is uniform plumbeous^ except the feet 

 and mouth, which are white. 



Thomomys fossor Allen. 



1S93. Thomomijs fossor Allen, BuU. Amer. Mus. Nat. Hist., V, p. 51, April 28 , 

 1893. (Florida, La Plata county, Colo.) 



One specimen of this species from Agua Fria Park, Colfax county, 

 N. M., collected by Emerson Atkins, w^as submitted by Prof. Cockerell. 

 It agrees with the type except for the more hirsute tail. 



Dipodomys merriami ambiguus (Merriam). 



1890. Dipodomys ambiguus Merriam, North American Fauna, No. 4, p. 42, 

 October 8, 1890. (EI Paso, Tex.) 



A fine series of sixteen specimens of this form was collected in the 

 vicinity of Alamogordo, Otero county, N. M., and a single specimen 

 was also examined from Pecos, Reeves county, Tex. A considerable 

 range of variation is presented in the series, some specimens appearing 

 quite grayish in comparison to the usual pale buffy coloration. 



Dipodomys spectabilis -Merriam. 



1890. Dipodomys spectabilis Merriam, North American Fauna, No. 4, p. 46. 

 October 8, 1890. (Dos Cabezos, Ariz.) 



A specimen of this form from vicinity of Alamogordo, Otero county, 

 N. M., probably not quite mature, differs from topotypes from the 

 Biological Survey collection in the slightly smaller size and more gray- 

 ish coloration. 



Perodipus ordii (Woodhouse). 



1853. Dipodomys ordii Woodhouse, Proc. Acad. Nat. Sci. Phila., VI, p. 235. 

 (El Paso, Tex.) 



A specimen of this species was examined from Pecos, Reeves county, 

 Tex. 



Perognathus flavus Baird. 



1855. PerognatMis flavus Baird, Proc. Acad. Nat. Sci. Phila., VII, p. 332. 

 . (El Paso, Tex.) 



Six specimens of this form from the vicinity of Alamogordo, Otero 

 county, N. ^L, were examined. 



