Batelka 1946 76 Balanophyra formicivora Oct. 16 El Batel, 5100 ft., Sinaloa. This is one of the commonest species throughout the oak-pine woodland. They appear to be regularly distributed; if there is colonality in the species here, no evidence of it has come to my attention yet, possibly because there is no breeding activity. Their calls and general behavior seem identical with that of the Californian birds. Today two were seen fly-catching after the sun came out of the early morning clouds. Oct. 21 None of us has seen any sign of acorn storing. These woodpeckers spend much time feeding about the epiphytic growths along the main limbs of the larger oaks. Flycatching is also common. The species is abundant and generally distributed, as indicated above. Nov. 7 Cañita, 40 km. S Nogales, 3300 feet, Sonora. One collected today; several a few single individuals noted in the period Nov. 6-10 in willow-poplar bottomland timber. Recorded by Van Ruesen (1945:135) as resident of oak and oak-pine regions; but not noted in oak woodland at Cañita, just south of Cañita, but recorded and collected in riparian timber.