Cogswell 1950 Aphelocoma coerulescens (NE¼, Sec. 16, T 18N, R 17E). June 22: 5650 ft. 2 mi. N Boca Nevada C., Calif. - 1 seen flying between pines (P. ponderosa sp.?) on SW-facing slope just above Boca Reservoir. The light breast & brown back were both seen. The vegetation here is typical arid transition zone forest, i.e. Jeffrey and/or yellow pines in open spacing, with low sagebrush + antelope brush (Bursia) in all interstices. There is a completely tree-less flat just S. of this slope; and a few desert juniper bushes were seen on the SE-facing slope whence the bird came. I know of no pinions within many miles, altho some may be present on or near Verdi Creek to the NE. As it was already past sunset I could not follow the bird farther. There are certainly no oaks nearest oak trees are in within many miles (Transition zone on W side of Sierra). June 27: 5200 ft.; Truckee Canyon just N of Nevada C. line, Sierra Co., Calif.: 1 seen in open Jeffrey pine - incense cedar forest with some creocarpus ledifolius, Quercus sp., & sagebrush + antelope brush in interstices. No juniper (& no oaks) within sight. This is 1½ mi. within Calif. on U.S. highway # 40 & about 6 mi. NE of above locality. 5700 ft., 4½ mi. W Steamboat Springs, Washoe Co., Nevada - 1 seen perched atop a tall Bursia bush in area of tall dense stand of same + Artemisia tridentata on alluvial fan E of Carson Range. This is the exact locale in several times which we noted this sp. frequently in summer of 1948.