INDEX. 
Woodpeckers 
tricolor 489 
zebra 487 
Wood-warbler, see Warbler 
Wood-wrens 259 
Work, a good day's 15 
Worm-eating swamp warblers 291 
warbler 292 
Wrangel's murrelet 813 
Wren 
alaskan winter 279 
bewick's 277 
floridian 277 
great Carolina 277 
house, eastern 278 
western 278 
marsh, long-billed 279 
short-billed 280 
rock 275 
speckled -tailed 278 
texan 277 
tul^ 279 
western winter 279 
white-bellied 278 
winter 278 
Wrens 273, 277 
cactus 274 
caiion 276 
marsh 279, 280 
house 278 
reed 277 
rock 275 
true 277 
winter 278 
Wren-tit 262 
henshaw's 262 
Wren-tits 262 
Wright's flycatcher 443 
Wrist-joint 106 
Wiirdemann's heron 658 
Wyoming water thrush 309 
Xanthocephalus 404 
icterocephalus 404 
Xanthura 424 
luxuriosa 424- 
Xantus luunining-bird 460 
Xema 753 
furcata 753 
sabinii 753 
Xenopicus 483 
albolarvatus 484 
Xiphoid process 144 
Yelk 
of eggs 220 
Yellow 
crake 674 
red-poll warbler 307 
wagtail 284 
Yellow-backed warbler, blue 290 
Yellow-bellied 
flycatcher 442 
red-poll warbler 307 
woodpecker 486 
Yellow-billed 
cuckoo 476 
loon 790 
magpie 421 
tropic bird 732 
Yellow-bird 354 
summer 298 
Yellow-breasted chat 312 
Yellow-crowned 
night heron 663 
warbler 301 
Yellow-fronted woodpecker 488 
Yellow-green greenlet 332 
Yellow-headed blackbird 404 
Yellow-rumped warbler 301 
Yellowshanks 638 
Yellow-throat, maryland 310 
Yellow-throated 
greenlet 333 
ground warbler 310 
warbler 306 
Yellow-winged sparrow 365 
bleached 3G5 
Yoke-toed birds 126 
Yucker 493 
Yuma thrasher 255 
Zamelodia 388 
ludoviciana 389 
melanocephala 389 
Zebra woodpeckers 487 
Zebrihis 654, 655 
Zenaida 568 
aniabilis 569 
Zenaida dove 569 
Zenaidinae 566 
Zenaidura 568 
carolinensis 568 
Zona pellucida 220 
Zonotrichia 381 
albicollis 382 
botterii 374 
coronata 383 
gambeli 383 
intermedia 383 
leucophrys 383 
querula 384 
Zoological 
characters 70 
groups 72 
table of 81 
Zygapophyses 137 
Zygodactyle 445 
birds 126 
foot 130 
Zvgodactylous arrangement 126 
Zygoma 162 
Zygomatic arch 162 
University Press: John Wilson & Son, Cambridge. 
