VOL. III.] Additions to Matnmal Fauna. 205 



In a paper entitled " The Geographic Distribution of Life in 

 North America with special reference to the Mammalia," by C. 

 Hart Merriam, M. D. (Proc. Biol. Soc. Wash, vii, April 13, 1892, 

 pp. 1-64), the following subgenera are revived or used for the first 

 time : 



Teonoma Gray (bushy tailed wood-rats). 



Neosorex Baird (genus of shrews reduced to subgenus). 



Atophyrax Merriam (genus of shrews reduced to subgenus). 



Tamiasciurtis Trouessart (containing the chickarees). 



Neosciurus Trouessart (subgenus of Sciurus). 



Parasciurus Trouessart (subgenus of Sciuriis?) 



Xerospermophihis (type, Spcrmophihis viohavensis). 



Ammospermophilus (type, Spermophihis lexccurus). 



Neofiber True (reduced to subgenus of Arvicold). 



SPECIFIC AND SUBSPECIFIC ADDITIONS AND CHANGES. 



1. DiDELPHis VIRGINIANA CALiFORNiCA (Bennett) Allen. 

 Texas Opossum. 



Didelphys calif ornica Bennett, Pr. Zool. Soc. i, 1833, 40. 

 Texas to City of Mexico. 



2. Cariacus macrotis californicus (Caton). Southern 

 Mule Deer. 



Cervus macrotis var. californicus Caton., Am. Nat. x, Aug. 1876, 

 p. 464. 



Southern Cahfornia. 



3. Arctomys DACOTA Merr. Black Hills Marmot. 

 Merriam, N. Am. Fauna, No. 2, p. 8. 



Black Hills, Dakota. 



4. Cynomys arizonensis Mearns. 

 Mearns, Bull. Am. Mus. Nat. Hist, ii, 4, p. 305. 

 Southern Arizona. 



5. Cynomys gunnisoni Baird. Short-tailed Prairie Dog. 

 Revived by Merriam, N. Am. Fauna, No. 3, p. 58. 

 Arizona; Colorado. 



6. Cynomys leucurus Merr. 

 Merriam, ibid, No. 4, p. 33. 

 Fort Bridger, Wyoming. 



7. Tamias striatus lysteri Rich. 

 Cf Merriam, Am. Nat. xx, 1886, p. 242. 



