Haase, on mimicry, 16; on classification of Papilionidae, 25 Hahnel, on S. American Pierines attacked by birds, 112 Hardy, on conditions of equilibrium in a mixed population, 94 Hearsy, on birds eating butterflies, 111 _Hebomoia_, 110 Heliconinae, as models for S. American butterflies, 38 _Heliconius_, 145; _H. eucrate_, XV. 3; _H. melpomene_, as model, 42, 43, XI. 5; _H. mirus_, XV. 1; _H. pardalinus_, XV. 4; _H. splendens_, XV. 5; _H. sulphurea_, 43, XI. 1; _H. telchinia_, XV. 2; _H. telesiphe_, XI. 3 _Herpestes galera_, 121 Hess, on colour perception in birds, 119 Hopkins, on pigment of Pierids, 150 _Hypolimnas dubius_, polymorphism in, 30; as mimic of Danaines,30, VII. 8, 9; breeding experiments with, 30; var. _mima_ compared with model, 148; patterns of in relation to models, 149; _H. bolina_, 25, 117, I. 5, 6; _H. misippus_, 25, 29, as model, 53; flight of, 55; in mimicry ring, 66, 116; eaten by Brown Shrike, 117; _alcippoides_ form, IX. H; _inaria_ form, IX. I; typical form, IV. 7, 8, IX. G _Ideopsis daos_, III. 4 Initial variation, difficulty of, 63 Insect enemies of butterflies, 105 Intermediates, between different forms of _Pseudacraea eurytus_, 128; in relation to mimicry,129, 140 Ithomiinae, characteristics of, 10; as models for S. American butterflies, 38 _Ituna_, 39; _I. ilione_, 40, XIV. 4; _I. phenarete_, XII. 3 Jacobsen, experiments with _Papilio memnon_, 89 Jordan, 40 note _Junonia_, 111 _Lanius cristatus_, 117 _Limenitis albomaculata_, 53; _L. archippus_, 49, 59, XVI. 6; _L. arthemis_, 47, 49, XVI. 4; _L. astyanax_, 47, XVI. 5; _L. floridensis (= eros)_, 49, XVI. 7; _L. proserpina_, 47 Lizards, as enemies of butterflies, 107 Local varieties, in connection with mimicry, 132 Lycaenidae, as mimics in Africa, 35 _Lycorea_, 145