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152 THI? CONDOR Vol. XVII The Sierra Sapsucker (Sphyrapicus varius daggetti ---- S. tuber tuber of the A. O. U. Check-List) is a rare visitor to this locality, and I have seen only three. February 9, 1910, a female was secured, October 5, 1910, a male taken, and October 5, 1914, another one seen but not secured. All three were in cot- tonwood trees, where some of the characteristic drawn-work was seen. The Red-naped Sapsucker (Sphyrapicus varius nuchalis) is a winter vis- itant along the Gila River, and while not to be called abundant, it is frequently noticed. I have seen individuals from October 6 to as late as April 17, and in all the months between these two dates. Once I saw three in one mesquite tree. Signs of their work are frequently present on cottonwood and willow trees and occasionally on an Arizona ash. If there are any almond trees in the country they are sure to be attacked, as they are favorites with these birds. Only once or twice have I seen mesquite trees attacked. Fig. 52. NEST HOLE OF CACTUS WOODPECKER IN TRUNK OF CHOLLA CACTUS. The Mearns or Ant-eating Woodpecker (Melanerpes formicgvorus aculeatus) may be termed a rare visitor to the Pima Reservation as I have seen only three of them during a stay of seven and a half years. May 22, 1908, I saw one at Casa Blanca, a few miles west of Sacaton; September 5, 1910, I secured one at Sacaton, at work on a mesquite woodpile in a back yard; and December 7, 1914, I saw one at Santan, on the north side of the Gila River. The Lewis Woodpecker (Asyndesmus lewisi) is another rare visitor, and I have noted only two during the time spent at Sacaton and Santan. One was seen a few miles from Sacaton on October 6, 1910; and one was secured at Sac- aton November 13, 1910, while he was at work on fruit in a late pear tree. Were it not for the Gila Woodpecker (Centurus uropygialis) what would become of the several species of birds that use already prepared cavities for their domiciles ? In some.cases these tenants do not even await the pleasure