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Nov., 1918 217 INDEX TO A Acanthis linaria linaria, 129 Aeeipiter cooperi, 18, 40, !27 velox, 127 Aegialitis semipalmata, 185 Aeronautes melanoleucus, 163 Agelaius phoeniceus nevadensis, 72 phoeniceus phoeniceus, 41, 186, 214 tricolor, 18 Aimophila ruficeps eremoeca, 42, 212 Aix sponsa, 91 Ajaia ajaja, 79 Albatross, Black-looted, 179, 180 Aluco pratincola, 40 Ammodramus savannarum bimaculatus, 42 Amphispiza belli belli, 190 bilineata bilineata, 42 bilineata deserticola, 23 Anas platyrhynchos, 75 Anderson, R. M., and Taverner, P. A., re- view of their "summary report of the geological survey of Canada, 1916", 141 Anhinga, 38 Anhinga anhinga, 38 Anser albifrons albifrons, 85 Anthus rubescerts, 45 spraguei, 24 Antrostomus carolinensis, 41 vociferus macromystax, 22 Aphelocoma californica californica, 12, 18, 71, 117 californica immanis, 190 californica obscura, 60 sieberi arizonae, 21 texana, 212 Aphriza virgata, 85 Aquila chrysaetos, 72, 191 Archibuteo ferrugineus, 127 lagopus sancti-johannis, 91 Archilochus alexandri, 21, 41, 46 Ardea herodias herodias, 18, 185 Ardetta exilis, 39 Asio fiammeus, 101, 125, 127 wilsOnjanus, 127 Astragalinus psaltria hesperophilus, 16 tristis salicamans, 16 Astur atricapillus, 141 Asyndesmus lewisi, 18 Auklet, Cassin, 180 Paroquet, 85 Auriparus flaviceps flaviceps, 43 VOLUME XX 8 Baeolophus atricristatus sennertl, 43 wollweberi, 21 Bailey, Florence Merriam, a return to the Dakota Lake region, 24, 64, 110, 132, 170 Baldpate, 123 Belding, Lyreart, death notice, 47; photo of, 50 Bergtold, W. H., review of his "a study of the incubation periods of birds-- what determines their length?", 95 Bittern, American, 28, 35, 75, 112, 136 Least, 39 Blackbird, Brewer, 72 Nevada Red-wing, 72 Red-winged, 18, .31, 41, 64, 65, 186 Trico10red, 18 Yellow-headed, 34, 69 Bluebird, 44 Western, 16, 18, 71 Bobolink, 34, 68, 112, 113 Bob-white, Texas, 39 Bombycilla cedrorum, 186 Bonasa umbellus, 185 Botaurus lentiginosus, 75 Bowles, $. H., northern owls again visit Washington, 45; two more records for the widgeon in Washington and other notes, 93 Brachyramphus marmoratus, 184 Bradbury, William C., notes on the nesting habits of the white-throated swift in Colorado, 103; notes on the nesting of the mountain plover, 157; nesting of th? rocky mountain jay, 197 Bra?ta canadensis, 185 Bryant, Harold C., evidence on the food of hawks and owls in California, 126; a new bird for Catalina Island, 193 Bubo virginianus pacificus, 125, 127 virginianus pallescens, 40 virginianus saturatus, 45 Bunting, Indigo, 23, 24 Lazuli, 19, 23, 212 Painted, 42, 191 Bush-tit, Lead-colored, 170 Buteo borealis calurus, 40, 72, 127, 191 borealis krideri, 214 lineatus alleni, 40 swainsoni, 191 Butorides virescens anthonyi, 169 virescens virescens, 39