16 PROCEEDINGS OF THE ACADEMY OF [Jan., 



ON THE TERRESTRIAL VERTEBRATES OF PORTIONS OF SOUTHERN NEW 

 MEXICO AND WESTERN TEXAS. 



BY WITMER STONE AND JAMES A. G. REHN. 



In the spring and early summer of 1902, Mr. H. L. Viereck and the 

 junior author spent about eleven weeks in, the Sacramento Mountain 

 region of south-central New Mexico. The expedition was undertaken 

 in the interest of the Academy, under the direction of the Board of Cura- 

 tors, and quite extensive collections of plants and insects as well as a 

 fair representation of other groups were secured. 



The localities visited and represented by specimens in the collections 

 are as follows : 



Ysleta, El Paso county, Tex. Elevation, 3,664 feet. A village along 

 the Rio Grande a short distance below El Paso. April 2d to 4th was 

 spent here, and collecting carried on in the cultivated strip between 

 the river and sand hills ("bosque"), and also in the latter very un- 

 productive section. 



El Paso, Tex. Elevation, 3,713-4,000 feet. Collecting was pursued 

 in the foothills of the Franklin Mountains to the north of the city. 

 March 31st and April 4th to 6th were spent in this vicinity. 



Alamogordo, Otero county, N. M., and vicinity. Elevation, 4,320 to 

 4,600 feet. This section was quite thoroughly examined, collecting be- 

 ing carried on by both members from April 7 to May 24, and b}^ Mr. 

 Viereck during several days in the earher part of June. Alamogordo is 

 situated in the broad San Augustine plain, two miles from the foothills 

 of the Sacramento range, to which latter almost daily trips were made. 

 The characteristic vegetation of this desert plain is greasewood or creo- 

 sote bush (Larrea) and mesquite (Prosopis). with scattered cactus 

 (Opuntia) and Spanish bayonet (Yucca), the latter becoming more 

 abundant toward the foothills. 



Dry Canon, Otero county, N. M. Elevation about 4,600-5,000 feet. 

 This canon, being easiest of access from Alamogordo, was visited almost 

 daily. The reptiles, insects and plants of this rather circumscribed 

 region were very thoroughly collected. 



Alamo Canon, Otero county, N.M. Elevation about 5.000-5.300 feet. 

 This canon is considerably larger than the foregoing and contains a con- 

 stant stream of pure water. It is located about seven miles southeast 



