LABYRINTHODONTIA, 298, 300. LAKES as cases of imperfect adaptation, 278. LANIADAE, sexual colouring and nidification of, 245. LAMARCK'S hypothesis very different from the author's, 41. _Larentia tripunctaria_, 63. LAW which has regulated the introduction of new species, 5; confirmed by geographical distribution, 9; high organization of ancient animals consistent with, 14; of multiplication in geometrical progression, 265; of limited populations, 265; of heredity, 266; of variation, 266; of change of physical conditions, 266; of the equilibrium of nature, 266; as opposed to continual interference, 268. LAYCOCK, Dr., on law of "unconscious intelligence," 360. LEAF BUTTERFLY, appearance and habits of, 59-61. LEPIDOPTERA, especially subject to variation, 132. LEPTALIS, species of mimic Heliconidae, 82; gain a protection thereby, 259. LESTER, Mr. J. M., on wood-dove and robin, 53. LEVAILLANT, on formation of a nest, 224. _Limenitis archippus_, 88. _Limenitis limire_, 172; _procris_, 172. LIZARDS refusing certain moths and caterpillars, 121; devouring bees, 121. LOCAL FORMS, 158. LOCAL variation of form, 169; of colour, 173; general remarks on, 174; in Celebesian butterflies, probable use of, 175. LOCUSTIDAE, adaptive colouring of, 64. LUMINOUSNESS of some insects a protection, 71. LYCAENIDAE, probable means of protection of, 176. MAMMALS, mimicry among, 107. MAN, does he build by reason or imitation, 212; his works mainly imitative, 225; antiquity of, 303, 322; difference of opinion as to his origin, 304; unity or plurality of species, 305; persistence of type of, 306; importance of mental and moral characters, 312; his dignity and supremacy, 324; his influence on nature, 326; his future development, 326; range of intellectual power in, 339; rudiments of all the higher faculties in savage, 341; his feet and hands, difficulties on the theory of natural selection, 349; his voice, 350; his mental faculties, 351; difficulty as to the origin of the moral sense in, 352; development of, probably directed by a superior intelligence, 359. MANTIDAE, adaptive colouring of, 64; mimicking white ants, 98. MALACODERMS, a protected group, 93. MALURIDAE, 255. MATTER, the nature of, 363; Mr. Bayma on, 363; is force, 365. MECHANITIS and Methona, mimicked by _Leptalis_, 83. MECOCERUS, dimorphism of, 155. _Mecocerus gazella_, 94. MEGACEPHALON, 196. MEGAPODIDAE, sexual colouring and nidification of, 246. MEROPOGON, 196. _Midas dives_, 97. MIMETA, mimicking Tropidorhynchus, 104.