Part 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 temperature, 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

Zoölogical Record, 70

Zoölogist, economic, 29

Zoölogy, experimental, 96

Zostera marina, ecology in Danish waters, 89

Zygoptera, life histories, 76

INDEX TO NAMES

Adams, Chas. C., 21, 22, 86, 91, 94, 99, 124, 133, 145

Adler, H., 143