Part 63

Composition, correct, 68 handbook of, 69 scientific papers, 66

Condition, of stress, 30, 31 pathological, 26

Conditions, artificial and “pathological,” 27 of existence, natural, 96 of production in the sea, 87

Conflict between organisms, geometrical representation, 125

Conjugation, lower organisms, 97

Contact, reactions of dragon-fly nymphs to, 118

Control of nature, 33

Convoluta roscoffensis, bionomics of green cells, 127

Cooking, manual, 58

Coöperation in study, 52

Coral, rose, feeding reactions, 109

Corn, 132 entomological ecology of Indian, 132

Corn plant, entomological ecology of Indian, 132

Correct composition, 68

Cotton boll weevil, insect enemies, 125

Cotton insects, 72 enemies, 72

Cotton worm, report on, 77

Courtship, Acridiidæ, 117

Cowbirds, 117

Crane flies, 76 larval habits, 76 life histories, 76

Crawfish, breeding habits, 108 ecological catalogue, 113 egg-laying, 108 habit formation, 106 habitats, 116 Pennsylvania, 116 stream environment, references, 113

Cricket, western, 77

Criteria, ecological, 16 in genetic studies, 56 of the psychic, 106

Criterion of imitation, 117

Crop rotation, 28

Crows, 117

Crustacea, in grave, 144

Cryptic coloration, 62 testing by experiment, 125