MAMMALS OF THE MEXICAN BOUNDARY. 105 



leaf ash {Fraxinus velutina). On the banks is a dense growth of 

 Aster spinosus Bentham ; and on the hills are fine groups of Agave 

 applanata huachucensis (Baker) Mulford. 



Station No. 37.^ — Santa Cruz Valley, near La Noria, Pima County, 

 Arizona. Mr. Holzner made a careful examination of the fauna of 

 this station from November 5 to 14 and 22 to December 5, 1892 ; also 

 October 19 to 20, 1893, during which periods he was encamped be- 

 side the Santa Cruz River at Monument No. Ill, 437 kilometers (271 

 miles) from the Rip Grande, at an altitude of 1,390 meters (4,570 

 feet) . The Santa Cruz or San Rafael Valley at this point is a broad 

 and treeless plain, covered with grass, stretching between the Pata- 

 gonia Mountains on the west and the Huachuca and Santa Cruz 

 mountains on the east. The camp of the old Boundary Survey, under 

 Major Emory, was located on almost- the same ground as that oc- 

 cupied by Mr. Holzner, whose collections of birds, mammals, and 

 fishes were of unusual value. On October 19, 1893, I placed a line 

 of mammal traps between Monument No. Ill and the town of Santa 

 Cruz, Sonora, to which latter point they were removed on the fol- 

 lowing day. 



Station No. 38.^ — Patagonia Mountains. Mr. Holzner occupied a 

 station at the summit of these mountains, south of Monument No. 

 114, 448 kilometers (278 miles) from the Rio Grande, at an altitude 

 of 1,750 meters (5,742 feet), from November 14 to 20 and 27, 1892. 

 The section of the Patagonia Mountains south of the Boundary Line 

 is called " Sierra de San Antonio." These ranges are well wooded and 

 contain springs of good water. (Plate XI, fig. 2.) From a base- 

 level of 1,130 meters (3,708 feet) they rise to the height of 2,217 

 meters (7,274 feet). Mr. Holzner obtained an interesting series of 

 mammals and birds in them. The flora is similar to that of the 

 Huachuca Mountains at corresponding altitudes. 



Station No. 39. — Town of Santa Cruz, Sonora, Mexico. The 

 writer, accompanied by Mr. Holzner, camped in the town, beside 

 the Santa Cruz River, about 12 kilometers (7.5 miles) south of Monu- 

 ment No. Ill, from October 20 to 23, 1893. The river at this place 

 enters a defile between the mountains, and, bending around the Mexi- 

 can section of the Patagonia Mountains (Sierra de San Antonio), it 

 turns and flows northward to the Gila River. The narrow valley in 

 which Santa Cruz lies is under thorough cultivation, and is covered 

 with beautiful gardens and orchards on either side of the town. The 

 alcalde paid his respects to us promptly, gave us a cordial welcome, 

 and personally assisted us in making collections. On every hand we 

 received friendly services and full liberty to collect specimens wher- 

 ever they could be found, in return for which favors it was a pleas- 

 ure to render such assistance as lay in our power to some of the pick 

 of the village who were commended to us by our friend the alcalde. 



