Vol. VIII, pp. 109-112 July 31, 1893 



PROCEEDINGS 



BIOLOGICAL SOCIETY OF WASHINGTON, 



<b - 



TWO NEW WOOD RATS FROM THE PLATEAU REGION 

 OF ARIZONA {NEOTOMA PINETORVMM^D N. ARTZON.E) 



With Remarks on the Validity of the Genus Teonoma of 



Gray. 



BY C. HART MERRIAM, M. I). 



The two new mammals herein described are of unusual inter- 

 est, not only because they are very distinct from any heretofore 

 recognized, but also because they inhabit a region tliat has been 

 pretty thoroughly explored during the past few years, and 

 from which an unusually large numl>er of mammals have been 

 already described.-'^ 



One of the \\q\\ species (.V. arizorue) presents a remarkable 

 (•oml)inatiou of the external characters of the bushy-tailed wood 

 rats (genus Teonoma of Gray) with tlie cranial characters of the 

 round-tailed species (Neotoma proper). The other (N. pinetoruvi), 

 is a round-tailed species allied to the A^. /^.scfpes group of Cali- 

 fornia. Incidentally, the stud}' of N. arizonx. led to the discovery 

 of an important character that serves to distinguish Teonoma. 

 from Neotoma. 



* No less than twenty new species and subspecies were discovered in 

 my biological survey of the San Fi-ancisco Mountain region in Arizona 

 in 1889 (see N. Am. Fauna, No. 3. Sept., 1S90) ; and others have been de- 

 scribed from the same general region by Dr. Edgar A. 3Iearns and Dr. J. 

 A. Allen. 



IG— Biol. Sue. Wash., Vol. VlII, 181)3. (109) 



