Pansies (_Viola tricolor_):--Great variety of color, 46; trickery of florists; aniline bath, 47; a chemical experiment; astonishing color, 48; ammonia as an agent; coloring an entire plant emerald green, 50; results from the fumes of sulphur matches, 52. Passion-flower, 189. Passion-vine, 186. Perfumed beetle (_Osmoderma scabei_), curious odor of, 133; suggesting Russia-leather; home on the maple-tree; sipping the sap; easily startled, 134. Pink, 205. Plant-louse of the apple-tree, 236. Pliny, 64, 114, 116, 252. Pollen bearers, 30. _Polyphemus._ See Moths. _Polyporus_, 144. Preservation of food by wasps, 256. Primrose ash, 73. Professor of biology, 70. "Professor Wiggler," what a florist's window suggested; the lilac-bush his home, 73; his characteristics, 74; how he came to be named; bringing him up by hand, 75; lively capers, 76; five changes of clothes; voracious feeding, 77; how he retains his head-shells, 78; digging out a home, 79; home completed; skilful concealment; what comes from the cocoon, 81; burrowing habits, 82. Puff-balls, 136; its purple cloud, 136; rapid change of substance; its cloud mass of reproductive atoms, 137; same results from mushrooms and toadstools, 138. Pungent odors, 132. "Quaker." See Grasshopper. "Racer," 85. Red Admiral. See Butterflies. "Red-hot child of nature," 92, 96. Redstart, 176. Red-tailed hawk, 152, 153. Riddles in flowers, 202; curious specimens; botanists and philosophers, 204; pollen-carrying, 207; galaxy of white or blue stars, 208; variety of construction, 209; solving the riddle, 211. Riley, C. V., quoted, 254. "Robin's pin-cushion," 43. Roland for an Oliver, 59. Roots, becoming stems and bearing leaves, 87. Rose garden, 126. Roses, blue, 45, 46; green, 187. Rosy moth, 85. Rowen-field, 116, 218. Sabbath sanctuary bouquet, 26. Sacred "scarabæus," emblem of immortality, 53. Sage blossom, its welcome to the bee, 221. Sand-hornet:--Prospecting for game, 249; the capture, 250; manner of transporting its prey, 251; its color and terrible sting, 252; not to be trifled with; its home in the sand-bank, 253; deposits its egg and leaves, 254; its mysterious poison, 256. _Scrophularia_, figwort, 28. Semicolon. See Butterflies. Sheep-spit, 84. Singular mimic fruit, 42. Small speckled beetle, 86. Smilax, 188. Snake expert, 67. Snake stories, 65. Snake-spit, 84, 85. Snapping beetle. See Beetles. "Snowin' 'pider-webs," 113. Sphinx caterpillar (_Chærocampa pampenatrix_) with his burden, 241, 242; the mischief-maker (_Microgaster_), 245. Spice-bush, 131, 132.