884 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



underparts white. Tail above, isrrizzled grayish drab, mixed with blackish on the 

 terminal third and bordered with buffj^; tail below, buff y with a subniarginal black- 

 ish Imnd. (North American Fauna, No. 4, p. 38. ) 



IlahlU and lo(ialdhtrlhu,ti,<>v. — I firstsaw the Apache ground-squirrel 

 between Mountain Sprino- and the San Pedro River at Tre.s Alamos, 

 April 8, 1885. A week later 1 met with it between Lordsburg, New 

 Mexico, and Alkali Flat to the westward, when crossing a series of 

 ridges covered rather scantily with the creosote bush {CoviJlea trldeu- 

 tata)^ where the burrows of this species were abundant, and the ani- 

 mals themselves often seen and heard. It was abundant April 18 to 

 24. 1885, at Deming, New Mexico, living under mesquites. While 

 marching from Lordsburg to Steins Pass, April 27, 1885, we found this 



FlO. 5^.— CiTELL'JS SPILOSOMA MACROSPI LOTUS. La NORIA. SoNORA, NEAR MONUMENT No. 112. (CAT. 



No. 35870, U.S.N.M.) a, Dorsal view; h, Ventral view; c. Lateral view. 



ground-squirrel abundant, and its lisping whistle Mas continuallv heard 

 as we passed hy. The joung were often seen during our march from 

 Steins Pass, New Mexico, to San Simon, Arizona, April 28, 1885; and 

 the animal was also observed on the plain ea.st of Dragoon Summit, 

 on the Southern Pacific Railroad, Arizona. 



In following the Mexican Boundary Line we never found this ground- 

 squirrel abundant except on the days when we crossed tiie San Simon 

 Valley. There it was continually seen running from one creosote 

 bush to another. 



