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Nov., 1918 INDEX TO VOLUME XX 225 Bay, British Columbia, 183; Heermann Gull with white primary coverts, 187; trinomials and current practice, 213 Taylor, Henry Reed, death notice, 47 Teal, Blue-winged, 31, 65, 67 Cinnamon, 38, 123 Green-winged, 185 Tern, Arctic, 85 Black, 32, 111, 112, 113, 175 Common, 180 Thrasher, Curve-billed, 43 Pasadena, 126 Thrush, Big Tree, 59 Dwarf Hermit, 145 Monterey Hermit, 192 Russet-backed, 192 Sierra Hermit, 24 White Mountains Hermit, 89 Thryomanes bewicki, 83 bewicki cryptus, 43 Thryothorus ludovicianus ludovicianus, 43 Titmouse, Bridled, 21 Plain, 98 Sennett, 43 Totanus flavipes, 44 Towhee, Abert, 97, 169 California Brown, 97, 117 Canyon, 117, 169 Green-tailed, 15, 73, 77 Mountain, 87 Sacramento, 15 Spotted, 83 Toxcstoma curvirostre curvirostre, 43 redivivum pasadenense, 126 Trochilus topiltzin, 181 Troglodytes aedon parkmani, 19, 75, 168 Turdus sequoiensis, 59 Turkey, Rio Grande, 212 Tyrannus tyrannus, 44 verticalis, 18, 170, 190 vociferans, 168, 170 Uria troille californica, 178 V Verdin, '43, 98 Vermivora celata lutescens, 16, 18 celata sordida, 189 luciae, 168 rubricapilla gutturalis, 17 virginiae, 168, 193 Vireo, Bell, 43, 98 Black-capped, 212 California Least, 211 Cassin, 19, 141 Gray, 98 Plumbeous, 168 Warbling, 176 Western Warbling, 16, 19, 168 White-eyed, 43 ireo atricapillus, 212 belli belli, 43 belli medius, 212 belli puslllus, 211 griseus griseus, 43 ireosylva gilva swainsoni, 16, 19, 168 Vulture, Black, 24, 38, 40 Turkey, 38, 40 W Walker, Alex, corrections, 44 Warbler, Audubon, 16, 22, 70, 74, 189 Black-throated Gray, 46 Calaveras, 17 California Yellow, 211 Dusky, 189 Golden-cheeked, 43 Golden Pileolated, 19 Grace, 168 Kentucky, 43 'Lucy, 98, 168 Lutescent, 16, 17, 18 Macgillivray, 17 Olive, 168 Red-faced, 21, 98, 168 Sonora .Yellow, 168 Tolmie, 76 irginia, 168, 193 Yellow, 15, 19, 30, 172, 176 Warburton, Stanley, Jr., some oceanic birds from off the coast of Washington and Vancouver Island, 178; late snowy owl dates, 193 Waxwing, Cedar, 186 ?Vetmore, Alexander, a note on the tracheal air-sac in the ruddy duck, 19 Whip-poor-will, 'Stephens, 22, 91 Widgeon, American, 123 European, 93, 122, 187, 192 Willard, F. C., evidence that many birds. re- main mated for life, 167 Willet, 34, 113 Willett, George, bird notes from Forrester Island, Alaska, 85; a pecularity of plumage in some specimens of the Heermann gull, 122 Wilsonia pusilla chryseola, 19 Woodpecker, Baird, 41 Batchelder, 22 Cabanis, 16, 169 Cactus, 169 California, 16 Golden-fronted, 41 Hairy, 186 Lewis, 18 Modoc, 71, 72, 73, 76 Northern Plicated, 13 Plicated, 45, 186 Red-bellied, 24