MAMMALS OF THE MEXICAN BOUNDARY. 55 



New Mexico, and on the plain near Alamo Hueco Spring, several 

 remarkably large specimens were observed growing beside a dry 

 arroyo. In descending through Guadalupe Canyon, from the high 

 Animas Valley, the first h{>okberries were met with at the altitude 

 of 1,481 meters (4,8G0 feet). A photograph of one was made at 

 1,493 meters (4,800 feet). It is of frequent occurrence on the upper 

 course of the San Bernardino River. On the western slope of the 

 Sulphur Spring Valley, at the altitude of 1.402 meters (4.G00 feet), a 

 sui^erb grove of hackberry trees occupies tlie bed of a dry water- 

 course. It is common in ravines of the Mule, Huachuca, and Pata- 

 gonia mountains, as well as throughout the upper Santa Cruz Valley. 

 None of the largest specimens was measured; but I should roughly 

 estimate their size at about 1 meter (3 feet) in diameter by 15 meters 

 (50 feet) in height. The altitudinal range of this species is from 975 

 meters, or 3.'200 feet (on the San Bernardino Eiver near the moutli of 

 Cajon Bonito Creek), to 1.700 ' niters, or 5.578 feet (Bisbee, Arizona). 



CELTIS RETICULATA Torrey. 

 PALO BLANCO. 



This tree was collected at ^Monument No. 00, jSIexican Boundary 

 Line, south of Bisbee, Arizona. It has been recorded by Dr. N, L. 

 Britton as among the collections sent in by Maj. Timothy E. "Wilcox 

 from the Huachuca Mountains, Arizona. As observed by us, it is a 

 small tree in arroyos, below the general timber line. I did not meet 

 with it, to the eastward, beyond the headwaters of the Eio Yaqui. 



CELTIS MISSISSIPPIENSIS Bosc. 

 SUGARBERRY, 



A common tree at Fort Clark. Kinuey County, Texas; also on tlie 

 Devils River, Texas. 



MORUS RUBRA Linnaeus. 

 RED MULBERRY. 



Texas, east of the Devils River. Las Moras Creek, at Fort Chu-k, 

 in Kinney County, received its name from the former abundance of 

 this tree on its banks. At present it is scarce there, only a few small 

 trees having been observed by us, but we Avere fortunate in obtaining 

 a specimen. 



MORUS CELTIDIFOLIA Humboldt, Bonpland, and Kunth. 

 MEXICAN MULBERRY. 



This nndberry was first seen in the Dog Mountains. There are 

 some fine ones at Dog Spring, which, we were informed, were the 

 only trees around the spring when the ranch was first established. 



