Index to Genera. 



Accipiter 88 



Actiturus 108 



Actodromas ... 108 



Actodromus 107 



.^Echmophorus 136 



^Egialites 101 



^Egiothus 63, 66 



^Esalon 90 



^thyia ....122 



Agelaeus 68 



Agelaius 68 



Aix 121 



Ajaja 110 



Alauda 47,48 



Alca 138 



Alcedo 79 



Alle 138 



Aluco 84 



Amazilia 77 



Ampelis 58 



Ammodramus 66 



Ammodromas 64 



Amphelocoma 71 



Amphispiza 66 



Anas 120, 121, 122 



Ancylochilus 107, 108 



Anorthura 46 



Anous 132 



Anser 120 



Anterior 91, 92 



Anthus 48 



Antrostomus. 75 



Aphriza 101 



Aqui la 92 



Aramus 113 



Archibuteo 91 



Ardea Ill, 112, 113 



Ardeola 112 



Ardetta 112 



Arctonetta 123 



Aristonetta 122 



Arquatella 107, 108 



Asio . 85, 86 



Astragalinus 66 



Astur 88 



Asturina 91 



Athene 86 



Atricilla 131 



Attagen 127 



Atthis 77 



Audubonia 112 



Auriparus 43 



Aythya 122, 123 



Bartramia 109 



Basilinna 77 



Bernicla 120 



Bombycilla 58 



Bonasa 97 



Botaurus 112 



Brachyotus .... 85 



Bubo 85 



Bucephala 123 



Budytes 48 



Buphagus 130 



Buteo 91, 92 



Butor 112 



Butorides 112 



Calamospiza 65, 66 



Calidris 107, 108 



Oallipepla 97 



Calothorax 77 



Calypte 77 



Campephilus 82 



Camptolsemus 122 



Campylorhynchus 45 



Canace 97 



Caprimulgus 75 



Carbo 126 



Cardinalis , 65, 66 



Cardellina 52, 55 



Carpodacus 63, 66 



Catarracta 130 



Catharista 93 



Cathartes 93 



Catherpes 45 



Centrocercus 97 



Centronyx 64 



Centrophanes 66 



Centurus 82 



Ceppus 138 



Ceratorhina 137 



Certhia 45 



Certhiola 55 



Ceryle 79 



Chaetura... 76 



Chamaea 43 



Chamgepelia 94 



Oharadrius 101 



Chaulelasmus 121 



Chen 120 



Chondestes 64, 66 



Chordeiles 75 



Chroicocephalus 131 



Chrysomitris 63, 66 



Ciceronia 137 



Cichlopsis 58 



Cinclus 41 



Circus SS 



Cistothorus 46 



Claugula 122,123 



Coccygus. 80 



Colaptes 82 



Collurio 59 



Collyrio 59 



Columba 94,95 



Colymbus 135, 136, 138 



Contopus 74 



Conurus 83 



