INDEX 



A. 



Abundance of caterpillars, 51. 



Acarus injuring birch trees, 104. 



Achenes, 38. 



Acorn, The development of, Gl. 



Action of frost on earth's crust, 

 187; of running water on earth's 

 crust, 187 ; of water on rocks, 

 93 ; of snow on earth's crust, 

 187 ; of young cuckoo instinctive, 

 161 ; of water on chalk, 191. 



Adonis Blue butterfly, 124. 



Aerial spiders, 11. 



Age of fishes, The, 189; of reptiles, 

 189 ; of mammals, 189 ; of rose 

 trees, Extreme, 41. 



Alcedo ispida, 194. 



Alimentary canal of spider, 14. 



Alternation of generations, 110. 



Anatomy of mole, The external, 143; 

 of caterpillar of Eyed Hawk moth, 

 203 ; of spider, 12. 



Antelopes, Natural selection acting 

 on, 150. 



Antennae of insects, The use of, 44 ; 

 structure of, 46. 



Antler moth, The, 113. 



Ants, communicate with each other, 

 159, 179 ; carrying pupae, 157 ; 

 discriminate between members of 

 their own nests and strangers, 169 ; 

 eggs of, 157 ; grain-growing, 158 ; 

 grain-storing, 158; keeping aphides, 

 166 ; males, females, and workers, 

 156; nests, 155, 166; swarming on 

 Ben Blieula, at Coburg, and in the 

 river Medway, 158. 



Aphides, 123; kept by ants, 166; 

 life history of, 168; abundant 

 progeny of, 168; parthenogenesis 

 in, 168. 



i Apis rnellifica, 131. 



I Apple, Structure of fruit of, 38. 



! Aquatic Warbler, The, 195. 



i Argynnis adippe, 140. 



' Argynnis aglaia, 139. 



Artificial selection, 28, 39, 147, 166. 

 1 Ash-tree, The, 31, 63, 78, 103; deri- 

 vation of name, 39. 



Aspen, The, 94, 100. 



" Assembling" habit in moths, 113. 

 1 Attar of roses, 41. 



B. 



Barn-owl, The, 70. 



Bats, 69. 



Battle between Lasius niger and 1 

 Lasius flavus, 169. 



Bean Goose, The, 186. 



Bed of Atlantic. Deposits in the, 

 174. 



Bedeguar, The, and its formation, 41 . 



Bed-straw, The, 124. 



Bee-bread, 131. 



Bee Hawk moth, The, 54. 



Bee orchis, The, 178. 



Beer manufactured from rowan 

 berries, 102. 



Bees, 49, 130 ; cell-making of, 171 ; 

 communicate with each other, 173 ; 

 community of, 130; fasten up 

 falling comb, 172; intelligence of, 

 172; number in hive, 130; swarm- 

 ing of, 133. 



Bell-heath, The, 95. 



Ben Bheula, Swarm of ants at, 158. 



Birch tree, The, 90, 95, 102, 123 ; 

 injured by acarus, 104 ; Polyporu-3 

 growing on, 105. 



Bird orgy, A, 57- 



Bird shambles, A, 56. 



Blackcap, The, 125, 127, 186, 230. 



