MAMMALS OF THE MEXICAN BOUNDARY. 



321 



stranded in C'ajoii Canyon, l)r()u<4lit down by the hi^h Avaters attending 

 cloud-bursts. 



On San Jose Mountain, Sonora. wliere it is abundant, I trapped a 

 specimen August 7, l81»o, at the altitude of 2.1!»4: meters or 7,200 feet, 

 and it doubtless reaches the summit. 



It was numerous in summer throug-hout tiie Iluachuca Mountains, 

 where I shot them as late in the year as October 26. Mr. Holzner 

 noted the following: "'No. 897 had 4 pairs of mamma3." Of another 

 specimen: "'It has a scent opening which it uses like SpiJ()g<ih\"' 

 Again: "Used its scant bag like SpnogaJe when killed in trap." 



In the Patagonia Mountains Mr. Holzner noted its presence in 

 numbers as late as November l-t, 1892. 



On October 28, 1893, a great many rock-squirrels were seen between 

 Nogales and Tubac. They were feeding upon mesquite beans. The 

 mesquites along this part of the Santa Cruz River were large trees, 

 and I shot two rock-squirrels on the mesquite tops from my horse. 

 Another w^as seen to enter a burrow at the base of a mesquite tree, 

 from which it had thrown out enough earth to till a flour barrel. 



It is abundant throughout the Pajaritos Mountains; but at La Osa, 

 December 8 to 28, 1893, we seldom saw them, owing to the coldness 

 of the season. Those obtained as specimens were taken in rocky 

 places near oak trees; their cheek-pouches contained seeds of various 

 weeds and njesquite beans. At Warsaw, in the Pajaritos, we found 

 the rock-squirrels still active in November, but during the first week 

 of December they began to disappear. On a warm dav I heard a 

 drum-like sound issuing from the desiccated remains of a cow, and on 

 kicking the dry skiri a rock-squirrel ran out. 



Record (ind ineaMimnetds of dO upeclme^ni of Otosperinopldlus grammurus. 



;wh;^9 



.\miTi( 

 -No. 



do.... 



I Fort Vorde, .\rizoiia Apr. 17 



do .Apr. 1« 



•ail Museum of Natural History. 

 56—07 M 21 



'' .Mamma fi\e pairs. 



