Part 59

Biocönose, 18 Halictus, 134

Biocönosis, 131

Biocönotic, 18

Biologia Centrali-Americana, 23

Biologic relations of plants and ants, 126, 127

Biological significance, of dissolved gases of water, 87 of thermocline, 87

Biological survey, of U. S., index to papers on, 128 ecological in methods, 114

Biology, 1, 2, 18, 60 butterflies, 118 lower Danube delta, 145 Orthoptera, 101 Physa, 110 relation to geological investigation, 22 relation to man, 11, 12 sand areas of Illinois, 146

Biometric ideas, 63

Biometric methods, 63

Bionomic base line, 30

Bionomics, 19, 21 green cells of Convoluta roscoffensis, 127 insects, 128

Bionomy, marine, and stratigraphy, 22

Biota, postglacial dispersal, 91

Biotic associations, 29, 91 sand areas, 146 sandy flats of seacoast, 136, 137

Biotic base, 30

Biotic community, 141

Biotic competition in tropics, 124

Biotic succession in media, 88

Bird census, sectional, 59

Bird habitats of Bismarck Archipelago, 137

Birds, adaptations by insects to, 125 and man, 130 associational studies, 146 behavior, 121 breeding habits of North American, 109 collecting, 58 colonies, 120 decrease, 124 destruction by elements, 124 ecological succession, 21, 124, 133 economic value, 123, 126 eggs of North American, 109 food, 126, 128, 130 food of nestling, 128 habitat groups, 145, 146 habitat preferences, 148 habitats in summer, 146 instinct, 113 intelligence, 113 life histories of North American, 109 methods of study, 39, 60, 61 migration, 109 migration as a response, 109 noxious, introduction, 124 of a Maryland farm, 125 of Isle Royale, ecological distribution of, 148 photographing, 59, 61 protecting woodlands, 124 protection, 124 protection of useful, 127 quantitative study, 59, 60 regulative action upon insect oscillations, 123 statistical study, 59, 60 stomach contents, estimating, 62 study 39, 60, 61

Birds’ eggs, collecting, 58

Birds’ nests, collecting, 58

Bismarck Archipelago, bird habitats, 137

Black bass as a microcosmic center, 49

Blind species of cave fauna, origin, 144

Blissus leucopterus Say, 20