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VOL. Il. | Additions to Mammal 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). 
Tamiasciurus Trouessart (containing the chickarees). 
Neosciurus Trouessart (subgenus of Sczurus). 
Parasciurus Trouessart (subgenus of Sczu7ws.) 
Xerospermophilus (type, Spermophilus mohavensis). 
Ammospermophilus (type, Spermophilus leucurus). 
Neofiber True (reduced to subgenus of Arvicola). 
SPECIFIC AND SUBSPECIFIC ADDITIONS AND CHANGES. 
1. DIDELPHIS VIRGINIANA CALIFORNICA (Bennett) Allen. 
Texas Opossum. 
Didelphys californica 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 California. 
3. Arctomys pacota 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, 7ézd, No. 4, p- 33- 
Fort Bridger, Wyoming. 
7. TAMIAS STRIATUS LYSTERI Rich. 
Cf. Merriam, Am. Nat. xx, 1886, p. 242. 
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