INDEX 



485 



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 Brachinus, 82; 410, 

 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- 



cations, 58 ; muscles, *6s ; vibration, 



63, 103 



Wistinghausen, von, 436 

 Witlaczil, 422, 430, 440, 443 

 Wollaston, on beetles of Madeira Ids., 



37.1 



Wood, T. W., 446 

 Wood-Mason, 411 

 Woodward, 441 

 Worker, ant, 330, 331 ; bee, *32i, 327, 



328; termite, *3i6, 318; wasp, 329 



Xanthophyll, as a pigment, 195, 215, 

 . Xenoneura, *386 

 Xiphidium, stridulation of, 105 



Yellow fever, 304 



Yolk, *i 4 6, *I47 



Young, on luminosity, 132 



Yucca, pollination of, *264, *26$, 266 



Zaitha, 191 

 Zander, 421 

 Zimmermann, 432 

 Zittel, von, 413 



