INDEX 



Trzciniak rokit-niczka, xxiii, 1, 

 Trziniak sivierszczyk, xxv, 1. 

 Tschernogoloivka, iv, 1. 

 Tuinfluiter, v, 1. 

 turdoides, Acrocephalns, xxii, 1. 

 Twin-nest, Garden Warbler, v, 15. 

 Tzif-tzaf, xii, 1. 



undata, Sylvia, viii, 1. . 



undatus, Melizophilus, viii, 1. 



Unemotional behaviour of male Reed Warbler, xx, 41, 



Uniformity, law of, Blackcap, iv, 34. 



Uunilintu, xiv, 1. 



Vandsanger, xxiv, 1. 



Variation, continuous, Marsh Warbler, xxi, 66, 67. 



Ventriloquism of young Grasshopper Warblers, xxv, 20. 



Ventriloquistic effects, Savi's Warbler, xxvi, 4; Grasshopper Warbler, 



xxvi, 4. 

 Vinadera, xvi, 1. 

 Violin, xxiii, 1. 

 viridanus, Phylloscopus, xi, 1. 

 Visceral actions, Marsh Warbler, xxi, 11. 

 sensations, Dr. Stout on, xxi, 11; Professor Lloyd Morgan on, 



xxi, 11. 

 Vocal antics, Blackcap, iv, 17, 18. 



development, Marsh Warbler, xxi, 62. 



efforts, combined, Garden Warbler, v, 18. 



extravagance, Garden Warbler, v, 14. 



its relation to emotion, xxi, 38. 



extravagances, xxi, 18. 



Garden Warbler, v, 8. 

 power highly developed in Marsh Warbler, xxi, 3. 



Marsh Warbler, xxi, 14, 29; Reed Warbler, xxi, 14. 

 powers, xxi, 55. 



correlated with sexual instinct, Marsh Warbler, xxi, 59. 



deteriorate after pairing, Blackcap, iv, 21. 



dormant during winter months, Marsh Warbler, xxi, 60. 



during courtship, Blackcap, iv, 16. 



excessive use of, Garden Warbler, v, 10. 



Garden Warbler, v, 12. 



Marsh Warbler, xxi, 8, 29. 



most pronounced in the Blackcap, iv, 16. 



Beed Warbler, xx, 58. 



well developed, Marsh Warbler xxi, 54; Blackcap, xxi, 54. 



Willow Warbler, xiv, 28. 



, Wood Warbler, xv, 10. 



Vodarisa rogocara, xviii, 1. 



31 



