Passerella iliaca White Rock Ranger Station, 4900ft, Trinity Co., Calif. May 30, 1946 Hunted in a.m. along the crest of a ridge about 2 miles east of camp. The terrain was open and parklike, with scattered yellow pines and some douglasfir. There was a scattered undercover of ceanothus (cordulatus?), scrub oak, and seeding pines. A ? Fox Sparrow (1724) emerged from a patch of ceanothus in answer to my owl calls, + was collected. The bird was very fat, and ready to lay. It uttered repeated "check-check" notes before emerging from its cover. After corning the bird, heard a m? singing from a fallen log about 50 feet away and it was collected (1723). May 31, 1946 Ran into a sizable population of Fox Sparrows on the crest of a ridge east of camp. This crest is quite dry and rocky, with large patches of manzanita and ceanothus growing around the rocky joints. Small douglasfirs and yellow pines grow just below the open crest. Pygmy owl calls + squeaks brought several Fox Sparrows out of the brush. Their loud "keef-keef" and "check-check" notes came in almost in- mediate response to my squeaks. Males could be heard, and were later found, sw- aying from the conifers below the ceanothus. They