238 



Index. 



O. 



Oak tree, The, 51, 59, 78, 103, 123 ; 



-apples produced by insects, 41. 

 Odoriferous glands in caterpillars, 



208 ; in sweetbrier, 37, 42. 

 Odour of flowers, 42 ; its use, 43 ; of 



flowers attractive to insects, 48 ; 



of flowers connected with colour, 



48; garlic, 49; Ghost moth, 225; 



hawthorn, 43; honeysuckle, 42; 



mignonette, 43, 46 ; pine tree, 49 ; 



protective to plants, 48 ; rose, 36 ; 



sweetbrier, 38, 42, 48, 49 ; tansy, 



49 ; violet, 43. 

 Old May Day, 29 ; oaken stakes, 60 ; 



red sandstone, 188 ; stone age, 189. 

 Ontogeny of oak, 63 ; of warty newt, 



23, 



Oolite formations, 188. 

 Orbitelariae, The, 13. 

 Organs of stridulation in ants, 171. 

 Origin of slave-making instinct in 



ants, 171. 

 Otter, The, 225. 

 Oxygen-carriers, 221, 222. 



P. 



Palaeolithic age, The, 189. 



Palm a local name for sallow. 209. 



Parasitical plants, 25, 26, 105, 135. 



Parthenogenesis in aphides, 168. 



Parus candatus, 139. 



Pea-green Tortrix moth, The, 51. 



Peregrine falcon, The, 52. 



Performing fleas, 163. 



Peronospora,135; spread of, 136. 



Pheasant, The, 52. 



Pieris rapae, 44. 



Pine tree, 58, 79, 82, 109, 185 ; odour 



of, 49. 

 Pistillate flowers of hop, 116, 128 ; 



oak, 61 ; of mistletoe, 27 ; willow, 



208. 



Plant galls, 41. 

 Plume moth (AmUyptilia acantho- 



dactyla), 113. 

 Polar bear, The, 65. 

 Polistes gallica, 162. 

 Pollen clouds, 62, 128. 

 Pulyporus on birch, The, 105. 

 Poppy, The, 140. 

 Post-tertiary rocks, 188, 190. 

 Potato blight, 135. 



Potentilla, The, 113. 



Power to discriminate in ants, 169. 



Preglacial times, 193. 



Prehistoric man, 187- 



Preservation of plant remains, 109, 



Primary rocks, 188. 



Privet Hawk moth, The, 204, 205. 



Production of special breeds of 

 pigeons, 147 ; fowls, 148 ; rabbits, 

 148; dogs, 16(5. 



Prolegs of caterpillar of Eyed Hawk 

 moth, 204. 



Protection of newt's eggs, 18 ; of 

 spider's eggs, 16. 



Protective coloration in insects, 82, 

 112, 113, 122, 126,138,140,150; 

 coloration in Argyunis aglaia, 140; 

 coloration in Carpet moth, 80, 81, 

 112 ; in Chalk Hill Blue butterfly, 

 126 ; resemblance in Eyed Hawk 

 moth caterpillar, 203 205 ; colora- 

 tion in heron, 195 ; coloration in 

 lizard, 178 ; coloration in Tortoise- 

 shell butterfly, 126 ; in Small 

 Copper butterfly, 126; scents in 

 plants, 46, 49. 



Prothallium of fern, The, 110. 



Pteris aquilina, 110. 



Pulex irritans, 214, 215. 



Pupae of ants, 157 ; of Eyed H:iwk 

 moth, 2D5 ; of Twin-spot Wainscot 

 moth, 225 ; of Stag beetle, 228. 



Pupation of Eyed Hawk moth, 205. 



Purification of blood, 222 ; in fishes, 

 221 ; in insects, 221 ; in mammals, 

 219 ; in newt, 18 ; in tadpole, 217 ; 

 in toad, 218, 220. 



Purple clover, The, 179 ; vetch, 137. 



Puss moth caterpillar, 206. 



Pyrausta purpuralis, 152. 



Pyrus aucuparia, 101. 



Q. 



Quail, The, 53. 



Quantity of material required to 

 build up shell of oyster, 195 ; of 

 solid matter brought down by 

 Thames, 194 ; of water discharged 

 into sea by Thames, 193. 



Quaternary rocks, 188. 



Queen ants, 156 ; ant carrying 

 worker, 156 ; bees, 131 ; -bee cells, 

 132; -bee, number of eggs laid by, 

 13:2. 



