B Bernicla, genus 54 “ nigricans pl. 10, 52 “ leucopareia pl. 45, 272 Bubo, genus 177 Buteo, genus 97 “ Bairdii pl. 41, 99, 257 “ insignatus pl. 31, 102, 198 C Callipepla, genus 50 “ Gambelii pl. 9, 45 “ squamata pl. 19, 129 Caprimulgidæ, family 235 Carpodacus, genus 78 “ familiaris pl. 13, 73 Cardinalis, genus 206 “ sinuatus pl. 33, 204 Cardinella, genus 266 “ rubra pl. 43, 265 Cathartes, genus 56 Ceryle, genus 254 Chamæa, genus 40 “ fasciata pl. 7, 39 Chordeiles, genus 237 Circus, genus 108 Cotyle, genus 247 Culicivora, genus 164 “ mexicana pl. 27, 163 Cyanocorax, genus 5 “ luxuosus pl. 1, 1 Cypselus, genus 248 Cyrtonyx, genus 25 “ Massena pl. 4, 21 D Diomedea, genus 211 “ brachyura pl. 50, 289 “ nigripes pl. 35, 210 Dryotomus, genus 287 “ imperialis pl. 49, 285