INDEX 



177 



Vanessa antiopa Linn., phototro- 



pism, 116 

 Variation, 



in animals, 96 

 in plants, 96 

 statistical, 60 

 Vegetation, 



and animal associations, 90 

 and control of land animal com- 

 munities, 133 

 Caithness, 88 

 changes in, 88 



controlling land animal communi- 

 ties, 90 



correlated with lake fauna, 140 

 development and structure, 88 

 invading alluvial flats, 89 

 invading new land surface, 89 

 Vegetational change, influence upon 



animals, 85 

 Vegetational control, 



of relative evaporating power of 



the air, 90 

 of relative humidity of air, 



90 



Vegetative cycles, causes, 88 

 Venus mercenaria, 

 growth, 108, 114 

 habits, 114 

 life history, 108 

 Veterinary zoology, bibliography, 



129 



Vineyard Sound, invertebrate ani- 

 mals of, 136 

 Visual discrimination in raccoons, 



110 



Vital conditions, optimum, 99 

 Vital optimum, 94 

 Voices of pigeons as means of social 



control, 106, 134 

 Volcanic activity and new land 



surface, 89 

 Volcanic islands, new flora, 89 



"Walking stick," 

 behavior, 119 

 habits, 119 

 mating instincts, 119 

 reactions, 119 



Walnut Lake, 



ecological relations of fish, 147 



fish ecology, 147 

 Warning coloration, 62 



testing by experiment, 125 

 Warning colors, insects of South 



Africa, 128 

 Wasps, social, 117 



behavior, 110 

 Wasps, solitary, 



habits, 116, 117 



habits, of Texas, 113 



instincts, 116, 117 

 Water, 



loss of and lowering of tempera- 

 ture, 99 



running, effect on productivity of 

 fish, 101 



standing, effect on productivity 



of fish, 101 



Weights and measures, 69 

 Wild life, 



photography, 61 



study, 61 



Windermere, Lake, 90 

 Wisdom, blindness of, 103 

 Wistar Institute, style brief, 68 

 Wood borers, 77 

 Woodcraft, 61 

 Woodland, 



ants, 149 



associations of ants, 149 



atmospheric conditions about, 91 

 . birds as protectors, 124 

 Woodland trees, insects affecting, 74 

 Woodpecker, red-headed, 117 

 Woodpeckers, food, 126 

 Worms, eyes, 110 



Yucca, 

 moth, 142 

 pollination, 142 



Zoological Record, 70 

 Zoologist, economic, 29 

 Zoology, experimental, 96 

 Zostera marina, ecology in Danish 



waters, 89 

 Zygoptera, life histories, 76 



