Petelka 1946 Oct. 13 El Batel, 70 km. NE Mazatlan, 5100 ft., Sinaloa. From the pass I turned northward along a shallow draw. Birds observed included Acorn- stoury woodpeckers (common), painted redstart, (common), a wren of uncertain identity (common), Wilsonia pusilla (migrant), Hylocharis leucotis (fairly common), Parus wollweberi (one flock of 8 or 10), Dendroica auduboni, Corthylii calendula, Sialia mexicana (a small flock flying overhead), Certhia familiaris, and later Cathartes aura. A pair of macaws and a small flock of parrots flew overhead. In addition there were birds glimpsed momentarily and calls heard once or more which were unidentified. Several groups of small birds were noticed; with the titmice, for instance, were at least one creeper, some warblers, and a small vireo, heard only, and identical in sound with our Californian V. huttoni. Several times the song of V. solitarius was heard, but the birds themselves were not seen. It is not possible to follow up each sound, nor to collect without thought of losing the specimen, because of the roughness of the country — steep slopes, loose brush piles, deep-cut canyons, etc. The vegetation presents an interesting mixture of type gf elements occurring in our Californian woodlands, some from the eastern U.S.