Fleas, 151.
Fowl, cackling instinct of, 112-115. Fox. See Canis azara. Freeman, Professor, on the humane instinct, 347.
Frog, an undescribed species, 75-78.
Furnariusrufus, 242, 256; destroyed by owls, 63; language, 256, 260; how it protects itself from parasites, 145.
GALICTIS BARBARA, 15; helplessness of young, 104.
Gallus bankiva, its cackling instinct, 115.
Garrod, Dr., on the Crested Screamer, 223.
Gauchos, their treatment of horses, 354.
Gay, Claudio, on the puma, 42.
Geobates, 242.