INDEX 



303 



Grasshopper, life-history of, 



224-28 



Grebe, foot of, 64 

 Gulls, black-headed, 86 



nests of, 210 



HABITS, choice, becoming, 129 



periodic, 129 

 Haddon, A. C., 6 

 Haemoglobin, no 

 Halictus (burrowing bee), 285 

 Headley, F. W., 64 

 Heart, control of, 37 

 Hibernation, 125 

 Hippolyte, colouration of, 169-77 

 Horse, movements of, 49 

 House-fly, 247 



tongue of, 91 



rate of growth, 222 

 Humming birds, 77, 207 

 Hydroids (zoophytes), 79 



ICHNEUMON (fly), life history, 



266 

 Intelligence, 17, 276 



JELLY-FISH, 13 



food of, 82 



movements, 32 

 Jenks, E., 248 



Kallima (leaf-butterfly), coloura- 

 tion of, 185 



LANKESTER, SIR RAY, 25 

 Latter, O. H., 300 

 Legs, of bees, 281 



of land vertebrates, 48-53 

 Lepisma (primitive insect), 22* 

 Life-histories, of black-fly, 257- 

 60 



of beetles, 238-240 



of butterflies, 240-6 



of caddis-flies, 235-8 



of corethra, 255-7 



of dragon-flies, 228-31 



of gall-flies, 267-8 



of gnat, 248-260 



of harlequin fly, 252-5 



of hymenoptera, 263-300 



of May-flies, 231-4 



Life-histories, of owl-midges, 257 



of saw-fly, 266 

 Life, as a response, 127-48 



changefulness of, 65, 99 



problems of, 24 

 Limax (slug), 74 

 Lizards, sand or brown, 18 



habits of, 5 1 

 Lugworm, 114 



McCooK, H., 98 



Machilis (primitive insect), 33 



Maine, Sir Henry, 248 



Man, power of adjustment, 



147-8 



Marey, P., 64 

 Mates, love of, 190 

 Mating, colours, 193 



combats, 193-6 



selection, 193-7 

 May-flies (frontispiece) 

 Melipona (bee), 292 

 Meloe (oil-beetle), life history, 



239-40 



Memory, organic, 128-31 

 Metamorphosis, 234 

 Miall, L. C., 235, 300 

 Midges, life-history, 257 

 Migration, of birds, 28-9, 57, 

 200-1 



of fish, 28, 200 

 Mimicry, 188-9 

 Mole, 78 



Morgan, Lloyd, 248 

 Mosquito, 248, 252 

 Moths, gooseberry, 188 



hawk, 42, 90 



mating of, 198 

 Movement, ciliary, 33-7 



of birds, 27 



of Crustacea, 38 



of fish, 43-7 



of lizards, 5 1 



of quadrupeds, 48-9, 52-4 



of seals, 53-4 



of vertebrates, 43 



of whales, 54-5 



of worms, 37 



spontaneity of, 37 

 Muscle, 91-101, 159 



pigments of, 159 



