115472 



492 



INDEX 



Weale, Mr. J. P. Mansel, on Ajuga 



ophrydis, 397 

 Weapons and tools, how they affect 



man's progress, 174 

 Webber, Mr., on food of humming- 

 birds, 321 

 Weevils often resemble small lumps 



of earth, 42 



Weir, Mr. Jenner, on a moth refused 

 by birds, 63 



on beetles refused by birds, 66 

 on caterpillars eaten, and rejected 



by birds, 84 



West Indian islands, large and bril- 

 liant butterflies of, 386 



peculiarly coloured birds of, 387 

 Westwood, Professor, objections to 



theory of mimicry, 76 

 Whip-snakes, 304 

 White animals poisoned where black 



escape, 389 



White colour in domesticated and 

 wild animals, 48 



in animals, how produced, 359 



(note) 

 doubly prejudicial to animals, 



390 



White colours influencing sense-per- 

 ception, 389 

 White tropical birds, 301 



Whitney, Professor, on the Calaveras 



skull, 447 



Wild and domesticated animals, essen- 

 tial differences of, 30, 31 

 Will really exerts force, 211 



probably the primary source of 



force, 212 

 Wilson, Dr., on pottery from North 



American mounds, 427 

 Winds, influence of, on temperature, 



225 



direction of, near equator, 225 

 cause of cold near equator, 226 

 Wood, Mr. T. W., on orange-tip 



butterfly, 43 

 Woodcocks and Snipes, protective 



colouring of, 39 

 Woodpeckers, why scarce in England, 



25 

 Woods from equatorial forest-trees, 



245 

 Works of art in auriferous gravels of 



California, 445 



XANTHIA, autumnal colours of these 

 moths, 45 



ZEBRA, possible use of its stripes, 368 

 Zebras, 164 

 Zingiberaceae, 254 



THE END 



Printed by R. & R. CLARK, Edinburgh. 



