Part 42

Odontocera odyneroides, 96.

ODONTOCHEILA, 97.

Odyncrus sinuatus, 90.

Onthophilus sulcatus, like a seed, 58.

Onychocerus scorpio, resembles bark, 56.

ORANGE-TIP butterfly, protective colouring of, 59.

ORCHIS, structure of an, explained by natural selection, 271.

Orgyia antiqua and O. gonostigma, autumnal colours of, 62.

ORIOLIDAE, 253.

Ornithoptera priamus, 145, 173; O. helena, 173.

Oxyrhopus petolarius, O. trigeminus, O. formosus, 102.

OWEN, Professor, on more generalized structure of extinct animals, 298.

Pachyotris fabricii, 96.

PACHYRHYNCHI, weevils mimicked by Longicorns, 95.

PALEOTHERIUM, 299.

PALOPLOTHERIUM, 299.

PAPILIO, black and red group imitated, 84.

Papilio achates, 147; P. adamantius, 171; P. aenigma, 87; P. agamemnon, 141, 158, 170, 171; P. agestor, 180; P. alphenor, 148, 169; P. amanga, 151; P. androcles, 171; P. androgeus, 88, 147, 180, 183; P. antiphates, 141, 171; P. antiphus, 87, 150, 170, 180, 183; P. aristaeus, 171; P. arjuna, 141; P. ascalaphus, 171; P. autolycus, 160; P. bathycles, 141; P. blumei, 171; P. brama, 171; P. caunus, 87, 179; P. codrus, 160, 171; P. coeon, 88, 146, 180, 182; P. deiphobus, 140; P. deiphontes, 171; P. delessertii, 180; P. demolion, 171; P. diphilus, 87, 170, 180, 183; P. doubledayi, 88, 180; P. elyros, 148; P. encelades, 171; P. erectheus, 151; P. euripilus, 160; P. evemon, 159; P. gigon, 171; P. glaucus, 152; P. hector, 87, 150, 180, 183; P. helenus, 160, 171; P. hospiton, 178; P. idaeoides, 180; P. jason, 159, 171; P. ledebouria, 148; P. leucothoe, 171; P. leodamas, 170; P. liris, 87, 180, 184; P. macareus, 179; P. machaon, 178; P. melanides, 148, 150; P. memnon, 88, 140, 146, 147, 152, 180, 183; P. milon, 171; P. nephelus, 140; P. nicanor, 170; P. oenomaus, 88, 180, 184; P. onesimus, 151; P. ormenus, 150, 152, 182; P. pammon, 147, 152, 170, 180; P. pamphylus, 171; P. pandion, 152, 180; P. paradoxa, 87, 179; P. peranthus, 160, 171; P. pertinax, 145; P. philoxenus, 182; P. polydorus, 88, 170, 182; P. polytes, 147, 148; P. rhesus, 171; P. romulus, 87, 148, 150, 183; P. sarpedon, 141, 158, 171; P. sataspes, 171; P. severus, 140, 144; P. theseus, 87, 148, 150, 169, 170, 171, 180, 183; P. thule, 179; P. torquatus, 156; P. turnus, 152; P. ulysses, 140, 160, 173; P. varuna, 88.

PAPILIONIDAE, the question of their rank, 133; peculiar characters possessed by, 134; peculiarly diurnal, 136; compared with groups of mammalia, 138; distribution of, 140; large forms of Celebes and Moluccas, 168; large forms of Amboyna, 169; local variation of form, 169; arrangement of, 186; geographical distribution of, 189; of Indo-Malay and Austro-Malay regions, 192; of Java, Sumatra, and Borneo, 193.

PARIDAE, sexual colouring and nidification of, 243.

PASSENGER pigeon, cause of its great numbers, 308.

PATENT inventions, as illustrating classification, 295.

Phacellocera batesii, mimics one of the Anthribidae, 94.

Phalaropus fulicarius, 115, 251.

PHASMIDAE, imitate sticks and twigs, 64; females resembling leaves, 112.

PHYLLIUM, wonderful protective colour and form of, 64.

PHYSALIA, 258.

PIERIDAE, local modification of form in, 172.