INDEX 
243; congenital variations, 243: 
imaginal buds, 180; instinct, 361; 
somatogenic variations, 241; tem- 
perature experiments, 204; use and 
disuse, 242; 422, 439, 442, 446, 448, 
449, 451, 452, 453, 460 
West, T., 416 
Westwood, on 
411 
Wheeler, on harvesting ants, 340; 
Malpighian tubes, 123; tropisms, 
345, 346, 348, 349, 355; 419, 430, 
433, 441, 458, 459, 460 
White, F. B., 418, 445 
White grubs, 398 
Whitman, 460 
Whymper, on distribution, 366, 462 
Wielowiejski, von, 432, 433, 438, 443 
Wilcox, 439, 455 
Wilde, 429 
Will, F., on taste, 96, 427 
Will, L., 437, 440 
Williams, 434, 445 
Wilson, 442 
Wings, 57; folding of, 61, *62; modifi- 
Brachinus, 82; 410, 
485 
cations, 58; muscles, *65 ; vibration, 
63, 103 
Wistinghausen, von, 436 
Witlaczil, 422, 430, 440, 443 
Wollaston, on beetles of Madeira Ids., 
371 
Wood, T. W., 446 
Wood-Mason, 411 
Woodward, 441 
Worker, ant, 330, 331; bee, *321, 327, 
328; termite, *316, 318; wasp, 320 
Xanthophyll, as a pigment, 195, 215 
NXenoneura, *386 
NXiphidium, stridulation of, 105 
Yellow fever, 304 
Yolk, *146, *147 
Young, on luminosity, 132 
Yucca, pollination of, *264, *265, 266 
Zaitha, 191 
Zander, 421 
Zimmermann, 432 
Zittel, von, 413 
