6 mi. N of Pachuca, 9600 ft, Hidalgo, Mex. July 1, 1946 Hunted from 6:30 a.m. to 9:30 a.m. The least productive terrain worked was the fir-bordered margins of the open grassy meadows. Most of the birds I saw were in firs along trails, or around clearings into the fir-forest where there was a low scrub of juniper and sapling fir, with a margin of second-growth fir. Such clearings have scattered patches of a red Pentstemon growing in them, and are alive with large, green-backed, blue-throated hummingbirds, feeding and fighting. This large hummer has a very sharp