_Novius cardinalis_, 32 _Nyctemera annulata_, 24, 55 Oak, 37, 51 Oak-scale, 37 _Odontria zealandica_, 57, 64 _Oeceticus omnivorus_, 56 Oleander, 34, 35, 36, 40 Oleander-scale, 40 Olearia forsteri, 60 Olearia gall-midge, 60 Olive-scale, 30, 35 Onion, 66 Orange, 35, 40, 51 Orange-scale, 40 Orchids, 36, 40 _Orcus chalybæus_, 36, 40 Oviparous, 42 Ovipositor, 21 Palms, 34, 35, 36, 40 _Paratetranychus pilosus_, 67 Paris green, 76 _Paropsis dilatata_, 59 Parthenogenetic, 42 Passion vine, 34 Pastures, 64, 65 Peach, 35, 36, 38, 44, 48, 59 Peach-aphis, black, 44 Peach-aphis, green, 44 Pear, 34, 35, 36, 37, 38, 40, 41, 50, 59, 60, 61, 70 Pear and cherry saw-fly, 59 Pear and cherry slug, 59 Pear-leaf blister mite, 70 Pear-midge, 60 Pelargonium, 51 _Pemphigus populi-transversus_, 48 Pepper-tree, 35 _Perrisia pyri_, 60 Persimmon, 35 Phormium, 34 _Phthorimæa operculella_, 62 _Phylloxera vastatrix_, 46 _Pieris rapæ_, 55 Pine-tree chermes, 46 Plant food, 12 Plant-lice, 42 Plum, 34, 35, 36, 38, 40, 44, 48, 59 Plum-aphis, 48 _Plutella maculipennis_, 52 _Pontania proxima_, 60 Poplar, 35, 37, 38, 48, 64 Poplar Gall-aphis, 42, 48 Porina, 65 Potato, 34, 62, 72 Potato sickness, 72 Potato tuber-moth, 62 Predaceous wasps, 78 Privet, 38 Protozoa, 8, 15 _Pulvinaria camelicola_, 37 Pupa, 25 Puparium, 25 _Pyronota festiva_, 58 Quince, 38, 40, 41 Radish, 55 Ragwort, 24, 56 Rape, 45, 48 Raspberry, 36, 41, 67 Red currant, 44 Red oil, 76 Red orange-scale, 40 Red spider, 68 _Rhizoglyphus hyacinthi_, 68 Rhododendron, 47 _Rhophalosiphum nymphææ_, 48 _Rhophalosiphum persicæ_, 44 Root-knot eelworm of tomato, 73 Rose, 35, 38, 40, 41, 47, 51, 58, 67 Rose-aphis, 42, 47 Rotation of crops, 75 Round-headed borers, 64 _Saissetia hemispherica_, 36 _Saissetia oleæ_, 35 San José scale, 32, 38 Scale insects, 29 Scylla, 66 Seasonal history of insects, 22 Seeds, damage to, 65, 66, 71 _Sesia tipuliformis_, 61 Shallot, 66 Shepherd’s purse, 44, 52 Silver-fish, 26 Slugs, 8, 71 Smaller narcissus fly, 66 Snails, 8, 71 Soil fumigation, 76 _Sphinx convolvuli_, 54 Sphinx moth, 54 Spiders, 8, 67 Sprays, 75 Springtails, 66 Spruce, 46 Steam sterilisation, 74 Steel-blue ladybird, 36, 40 Stomach poisons, 76 Strawberry, 64, 68 Subterranean grass caterpillars, 65 Sulphur smudge, 58, 65 Syrphids, 66 Tachinids, 78 _Tetranychus telarius_, 68 Thrips, 27, 48 Thrush, 35 Tobacco, 54, 73 Tomato, 47, 54, 62, 73 Tomato root-knot eelworm, 73 Tomato stem-borer, 62 Tortoise beetle, 59 _Tortrix postvittana_, 51 Tree-lucerne, 64 _Trialeurodes vaporariorum_, 48 Tui, 35 Tulip, 66, 68 Turnip, 45, 48 Turnip-fly, 57 Turtle-scale, 36