Article XXIV. LIST OF MAMMALS COLLECTED BY 

 MR. J. H. BATTY IN NEW MEXICO AND DURANGO, 

 WITH DESCRIPTIONS OF NEW SPECIES AND 

 SUBSPECIES. 



By J. A. ALLEN. 



The present collection was made for the Museum by Mr. 

 J. H. Batty, mostly during the present year. During Decem- 

 ber, 1902, he collected in Donna Ana County, New Mexico, 

 near the southern border, at localities less than one hundred 

 miles west of El Paso, Texas. Early in January he went to 

 the northwestern corner of the State of Durango, Mexico, 

 where he continued his work till August, 1903, exploring the 

 arid foot-hills and plains at the eastern base of the Sierra 

 Madre, from the southern boundary of Chihuahua southward. 

 The localities visited are embraced within an area of about 

 one hundred square miles, and range in altitude from 6800 to 

 8500 feet. The region was practically un worked, and is some- 

 what distant from any point where thorough collecting had 

 previously been done. The mammalian fauna is scanty, but 

 proves unexpectedly rich in new forms, and in respect to 

 coloration and some other features the species present, in 

 general, distinctive peculiarities. 



In general facies the fauna of this region more closely re- 

 sembles that of the southern border of Arizona than it does 

 that of the upper Rio Grande region of Texas and New 

 Mexico. The thoroughness with which Mr. Batty worked is 

 attested by a collection of about 600 specimens, numbering 

 34 species, many of which are represented in large series. The 

 record of specimens given under each species doubtless fairly 

 indicates their relative abundance. 



The specimens collected in New Mexico proved of great in- 

 terest for comparison with those from Durango, and in every 

 case the forms inhabiting the two regions proved readily dis- 

 tinguishable. It was expected that the Durango forms would 

 in most instances prove identical with species and subspecies 



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