Butterflies:-- Idalia (_Argynnis idalia_), Archippus (_Danais archippus_), yellow swallow-tails (_Papilio turnus_), 131; Red Admiral (_Vanessa atalanta_), 155, 158, 161; "comma" (_Vanessa comma_), 156, 161, 170; Atalanta (_Cynthia atalanta_), 158; semicolon (_Vanessa interrogationis_), 161. Canterbury bells, 42. Cardanus quoted, 93. Careless observation of nature, 185, 186. Carnation, blue, 46. Catbrier, 188. Caterpillars:-- woolly-bear (_Arctiadæ_), 148; "bull's-eye" (_Saturnia io_), 156; sphinx (_Chærocampa panipenatrix_), 241. Cecropia, 156. Chinese pink, 73. Chipmonk, 153. Chrysalids, 161. Chrysanthemum, 86, 127. Cicada, 87, 246; his manner of feeding; how he differs from the grasshopper; the secret of his music, 250; his last song; borne off by his captor, 251; living food, 254; suspended animation, 255. _Clintonia_, 239. Clothes moth (_Tineidæ_), 170. Clover (_Trifolium_), four-leaved, 215; nine-leaved, found in groups, 216; possibilities of cultivation, 217; an exceptional find, 218, 219; saying its prayers, 219; lotus, 222. Cobweb showers, 114; blinding dogs interrupting sport, 114; flakes and rags of, 115; silken streamers, 116; shower in Prospect Park, Brooklyn, 120; on Brooklyn Bridge, 121. Cocoons:--curious, 145; solid to the core, 147; ribs and vertebræ, 149; secret of the hollow, 151; what the pellets were, 152; yielding wasps, 242. Colors of flowers, laws governing colors and combinations, 44, 45; natural exception to; three primary colors in the hyacinth, Egyptian lotus; sky reflections destroying color, 45. Columbine (_Aquilegia canadensis_, _A. chrysantha_, _A. cærulea_), puzzling color classification, from white through all shades of red, yellow, and blue, 46. "Comma." See Butterflies. Coral, gray, 73. Cow-spittle, 84, 86. Crickets, 71. Cross-fertilization of flowers, 30, 167, 208, 211, 229. Cuban belle's toilet, 21. Culpepper, Dr., quoted, 154. _Cyanic_, flowers with all shades of blue and red without yellow, 45. _Cynips seminator_, _Cynips rosæ_, gall-flies, 40. Dahlia, blue, 45. Daisy, pesky white weed, almost identical with the marguerite, 25; a marvel of a flower, 28, 205, 211. Dandelion. Seeds used for birds'-nests, 173; mutilation of, 174; a week of retirement, 175; flight of the seed-bed, 176; the burglar discovered, 177, 211. Darwin, 202, 209, 224. Darwin flowers, 166, 167, 168. De Candolle. Color limitations in flowers, 45, 202. Deer-mouse, 151. Desmodium, 223. "Digger-wasps," sand-hornets, 252. Dungeons of death, 54. Egyptian history, 53. Egyptian yellow lotus, 45.