210 THE CONDOR Vol. XVI

easily be imagined that a dislike to leave this section would drive 'them to make their home upon the flats where, omitting the rocks and cliffs, other con- ditions would appear most favorable. Be that as it may, my untimely disturb- ance of the nest, must have destroyed all faith in its suitability, for after the first day they were never seen to enter it again, and in a couple of days left en- tirely. I append a list of the birds observed upon the Flats.' Band-tailed Pigeon. Golumba asctata. Several seen. Sharp-shinned Hawk. Acciliter velox. One pair. Cooper Hawk. Acciliter cooliefl. Western Red-tailed Hawk. Buteo borealis calurus. One seen. Golden Eagle. Aquila chrysaetos. Examined a this-year's nest. Long-eared Owl. Asio wilsonJanus. Two young shot before our arrival. Pacific Horned Owl. Bubo virginianus lacificus. Seen in the evening. Cabanis Woodpecker. Dryobates villosus hyloscolus. Nest with young. Red-breasted Sapsucker. tlhyralicus tuber. One seen. California Woodpecker. Melanerles foricivorus bairdi. Breeding. Red-shafted Flicker. Colaltes caret collaris. Breeding. Dusky Poor-will. Phalaenotilus nuttalli californicus. Texas Nighthawk. Choralelies acutiennis rexcrisis. Several seen. White-throated Swift. Aeronautes melanoleucus. One pair, breeding? Black-chinned Hummingbird. Archilochus alexandri. Young in nest. Anna Hummingbird. Calyte anna. Breeding. Rufous Hummingbird. Selashorus rufus. One male. Arkansas Kingbird. Tyrannus erticalis. Ash-throated Flycatcher. Myiarchus cinerascens, Breeding. Black Phoebe. Sayornis nigricans. Olive-sided Flycatcher. Nuttallornis borealis. In wooded canyons, among the pines. Western Wood Pewee. Myiochanes richardsoni. Full grown young in nest. Western Flycatcher. Emidonax diicilis. Breeding. Wright Flycatcher. Emidonax wrighti. A pair seen carrying nesting material to outer. limb, high in a pine tree. Blue-fronted Jay. Cyanocitta stelleri rontalis. Nests found containing young and eggs. California Purple Finch. Carodacus urureus caliornicus. Quite tame about the camp. Lawrence Goldfinch. Astragalinus lawrencei. Breeding. Sierra Junco. Junco oreganus thurberi. Breed(rig. San Diego Song Sparrow. elosiza melodia cooeri. Spurred Towbee. Piilo maculatus megalonyx. Breeding. Green-tailed Towbee. Oreosiza chlorura. Breeding. Western Tanager. Piranga ludoviciana. Nests found with eggs and with young. Western Martin. Progne subis heseria. Breeding. Tree Swallow. lridorocne bicolor. Several pairs seen. Northern Violet-green Swallow. Tachycineta thalassina leida. Western Warbling Vireo. ireosyla gila swainsoni. Breeding. Hutton Vireo. ireo huttoni. Breeding. Lutescent Warbler. ermiora celata lutescens. One pair around camp. Black-throated Gray Warbler. Dendroica nigrescens. Three noted at camp. Golden Pileolated Warbler. Wilsonia usilla chryseola. One pair at camp. Rock Wren. Salinctes obsoletus. Dotted Canyon Wren. Catheres mexicanus unctulatus. With full-fledged young. Western House Wren. Troglodytes aedon arkmani. Nests found with eggs and with young. Slender-billed Nuthatch. Sitta carolinensis aculeata. Several seen. Found breeding here in 1913. Bailey Mountain Chickadee. Penthestes gainbell baieyae. Breeding. Pailid Wren-tit. Chamaea fasctata henshawi. Breeding. Western Bluebird. Sialia mexicana occidentalis. Nests found with eggs and with young. Los Angeles, California, July 4,