Part 32

Neotropical region, mammalia of, 331 birds of, 332

Nests of humming-birds, 137

Newton, Professor, on appearance of living humming-birds, 130

New Zealand, poor in flowers and insects, 235

New World, regions of the, 329

North American earthworks, 292

Nuttall, Mr., on the rufous flame-bearer, 131

Nymphalidæ, local resemblances of species of distinct genera of, 257

Oceanic Islands, peculiar floras of, 269 theory of, 307

Odontomachus, genus of ants, 82

Odour deficient in New Zealand flowers, 277

Odours absorbed unequally by differently coloured stuffs, 266 of flowers attractive, 230

Œcodoma cephalotes, 85

Œcophylla smaragdina, 82

Ogle, Dr., on colour and sense-perception, 265

Oil from palms, 45

Oncidiums, 51

Optical theory of colour, 180

Orchids, 49

Oriental Region, 319

Ornamental humming-birds, the most pugnacious, 214

Ornaments, display of, by male humming-birds, 134

Orthoptera, 91

Palæarctic Region, 314

Palms, 40 height of, 41 climbing, 41

Palm-wine, 43

Palm-trees, uses and products of, 42-46

Pandanaceæ, 49