ALPHABETICAL INDEX OF GENERA OF BIRDS. 
(the numbers are those of the first species mentioned in the catalogue.) 
A. 
Accipiter, 15 
Actiturus, 545 
Actodromus, 531 
Adamastor, 651 
Aegialeus, 507 
Aegialitis, 504 
Aegiothus, 320 
Aestrelata, 638 
Agelaius, 401 
Aix, 587 
Aloa, 710 
Aminodromus, 341 
Ampelis, 232 
Anortliura, 273 
Anous, 696 
Anser, 563 
Anthus, 165 
Antrostomus, 111 
Aphriza, 511 
Apobapton, 732 
Aquila, 39 
Aramus, 480 
Ardea, 487 
Ardetta, 491 
Archibuteo, 30 
Ardenna, 647 
Arquatella, 528 
Astragalinus, 313 
Astur, 14 
Asturina, 33 
Athene, 58 
Atthis, 105 
Audubonia, 489 
Aytliya, 591 
B. 
Basilenterus, 
Batlimidurus, 121 
Bernicla, 567 
Blasipus, 663 
Bonasa, 465 
Botaurus, 492 
Brachyotus, 52 
Brachyrhamplius, 732 
Bubo, 48 
Bucephala, 593 
Buteo, 18 
Butorides, 493 
C. 
Calamospiza, 377 
Calidris, 534 
Callipepla, 476 
Campephilus, 72 
Camptolsemus, 600 
Campylorhynchus, -262 
Cardellina, 216 
Cardinalis, 390 
Carpodacus, 305 
Cataractes, 729 
Cathartes, 1 
Catherpes, 263 
Centrocercus, 462 
Centronyx, 331 
Centrophanes, 326 
Centurus, 91 
Cerorliina, 717 
Certhia, 275 
Certhiola, 301 
Ceryle, 117 
Chaetura, 109 
Chamaea, 274 
Cliamaepelia, 453 
Charadrius, 503 
Chaulelasmus, 584 
Chen, 563 
Chenalopex, 710 
Chloephaga, 573 
Chloroceryle, 118 
Chondestes, 344 
Chordeiles, 114 
Chroicocephalus, 667 
Chrysomitris, 310 
Ciceronia, 722 
Circus, 38 
Cistothorus, 268 
Coccygus, 69 
Colaptes, 99 
Collyrio, 236 
Columba, 445 
Colymbus, 698 
Contopus, 137 
Conurus, 63 
Corvus, 423 
Coturnicops, 557 
Coturniculus, 338 
Cotyle, 229 
Craxirex, 46 
Creagrus, 679 
Creciscus, 556 
Crex, 558 
Crotophaga, 66 
Cupidonia, 464 
Curvirostra, 318 
Cyanocitta, 457 
Cyanospiza, 383 
Cyanura, 434 
Cygnus, 561 
Cyrtonyx, 477 
Cyrtopelicanus, 615 
D. 
Dafila, 578 
Daption, 639 
Demiegretta, 482 
Dendrocygna, 574 
Dendroica, 189 
Diomedea, 630 
Dolichonyx, 399 
Dysporus, 399 
E. 
Ectopistes, 448 
Elanus, 35 
Embernagra, 373 
Empidonax, 140 
Eremopliila, 302 
Ereunetes, 535 
Erismatura, 609 
Erolia, 529 
Euphonia, 224 
Euspiza, 378 
P. 
Falcinellus, 500 
Falco, 5 
Florida, 490 
Fratercula, 713 
Fregetta, 646 
Fulica, . 559 
Fulix, 588 
Fulmarus, 635 
G. 
Gallinago, 523 
Gallinula, 560 
Gambetta, 539 
Garzetta, 485 
Gennaia, 10 
Geococcyx, 68 
Geothlypis, 170 
Glaucidium, 60 
Glottis, 538 
Goniaphea, 380 
Graculus, 620 
Grus, 478 
Guiraca, 380 
Gymnokitta, 431 
H. 
Haematopus, 512 
Haliaetus, 40 
Harelda, 597 
Harporhynclius, 256 
Helmintliophaga, 180 
Helmitherus, 178 
Helospiza, 368 
Herodias, 486 
Hesperiphona, 303 
Heteroscelus, 543 
Hierofalco, 11 
Himantopus, 518 
Hirundo, 225 
Histrionicus, 596 
Hydrobata, 164 
Hydrochelidon, 695 
Hylotomus, 90 
Hypotriorchis, 7 
I. 
Ibis, 498 
Icteria, 176 
Icterus, 408 
Ictinia, 36 
Ixoreus, 156 
