380 



CIVIC BIOLOGY 



Warbling vireo, 50 



Wasps, 153 



Water beetles, larvye of, 131 



Water bugs, 153 



Water cress, 306, 307 



Water hemlock, 73, 75 



Water lilies, 306, 307 



Water snakes, 326 



Waterfowl, 38, 39, 40, 45, 324 



Wax wings, 50 



Weasels, 169 



Weeds, 67-76 ; adaptability of, 70 ; 



classes of, 70, 71 ; damage from, 



68 ; destruction and control of, 34, 



69, 71; medicinal, 71, 72 

 Weeping willow, 84 

 Weevils, 155, 156, 317 

 Western little-neck clam, 278 

 Western prairie chicken, 42 

 Whale, 169 

 Wheat, 93, 94, 95, 97 

 Whippoorwill, 47, 129 

 Whistling swan, 39 

 White ants, 153, 155 

 White ash, 82 

 White cedar, 59 

 White diarrhea of chicks, 233 

 White elm, 59 

 White hellebore, 76 

 White man's plant, 75 

 White pine, 59, 84 ; type for study, 



4, 5, 6 



White-breasted nuthatch, 51 

 Whitefish, 309 



White-marked tussock moth, 156 

 White-throated sparrow, 49 

 Whooping cough, 232, 234, 247 

 Wicky, 75 

 Widal reaction, 251 

 Wild boar, 263 

 Wild carrot, 71 

 Wild cat, 169 

 Wild celery, 307 



Wild cherry, 75 



Wild duck, 53, 325 



Wild onion, 71 



Wild rice, 307 



Wild rose, 86 



Wild sago, 307 



Wild trout, 305 



Wild turkey, 42, 53 



Willow, 59, 307 



Wilson snipe, 40 



Wilson's thrush, 51 



Wilt disease, 212 ; bacterial blight, 



215 ; stem blight, 216 

 Window flytrap, 108, 109 

 \V ode-whistle, 75 

 Wolf, 169, 256 ; itch mite of, 166 

 Wolfsbane, 76 

 Wolf s-milk, 76 

 Wolverine, 169 

 Wood duck, 39, 40, 306, 307 

 Wood frog, 315, 316, 319 

 Wood laurel, 75 

 Wood pewee, food of, 24, 47 

 Wood thrush, 51 

 Wood ticks, 165, 168 

 Woodcock, 40 

 Woodpecker, 7, 46 

 Woolly apple louse, 156 

 Woolly loco weed, 76 

 Worms, 51, 315 

 Wormseed, (59 

 Wrens, 50 



Yeara, 75 



Yeast, 186, 189-197 ; a cause of dis- 

 ease, 197 ; description of, 191. 192 ; 

 distribution of, 192 ; pure culture 

 of, 195 ; uses of, 194 



Yellow fever, 20, 123, 124, 126, 134, 

 233, 236, 240, 253, 254, 256, 258 



Yellow perch, 309 ; topography of, 

 298 



Yellow pine, 59 



