INDEX 



347 



Riley, C. V., quoted, 237 

 Rings, of body, 31, 33, 34 

 Robber-flies, 93, 185 

 '• Robin's pin-cushion," 201 

 Ross, Major Ronald, researches in mal- 

 aria, 324, 325 

 Ruby-wasps, 98, 271 



Sage tribe, adjustment for insect visitors, 



227 

 Salvia, fertilisation by insects, 227 

 Saperda, 81 

 Sarcophaga, 172 

 ophagincB, 94 

 SarcopsyUidce, 95 

 Saturnia, 143 

 Saturniidce, 90, 333 

 SatyrirME, 91 

 Satyrus, 137 



Saiiba, or leaf-cutting ants, 300 

 Saunders, Mr. E., 295 

 Saw-flies, 96 



— damage to corn by, 320 



— defensive devices of larvae of, 167, 

 1G8 



— gooseberry, 200 



— "horse-bean galls" produced bv, 199 



— larvae of, 56, 167, 168, 278 

 Scale insects, 23, 73, 168 



— as prey of owl moth, 190 



— ravages checked by ladybirds in 

 America, 330 



— valuable substances produced by, 333 

 Scarabccidce, 80 



Scarabceus sneer, 189 



Scavenger insects. See Carrion feeders 



Scent, attraction for insects, 231 



— part played in sexual selection by, 

 258 



— production by insects, 253, 254 

 Scent-glands of insects, 114 

 Schizoneura, 168 



Sciara, 275 

 Scdiidce, 99, 267, 278 

 Scolopendrella, 34 

 Scolytidte, 83, 272 

 Scorpion-flies, 84, 177 

 Scudder, S. H.,109 

 Scutellum, 70, 77 

 Seasonal dimorphism, 142 

 Secretions of insects, 187 



— of aphides, 212 



— defensive, 167, 168 

 Sedgwick, Professor, 32 

 Seed-destroying insects, 197, 198 

 Segmentation of insects' body, 31, 33 

 Senses of insects, 101 



Sesilda, 87 



Sex characters of insects, 252 et seq. 



Sexual selection among insects, 256 

 Sharp, Dr., quoted, 180, 181, 195, 253, 



277, 301, 305 

 Sheep-tick, 46, 95, 188 

 Sialidce, 74, 317 

 Silk, 332 



Silk production by insects, 143, 332 

 Silk moths, 89 

 Silkworms, 89, 251, 332 

 Silpkidce, 79 

 "Silver-fish" insect, 22, 26, 34, 47, 60, 



103, 296 

 Siphonaptera, 95, 188 

 Sirex, 97, 194 



Siricidce, 97, 194— Wood-wasps, q.v. 

 Skin-changing. See Moulting 

 Slater, Miss, 272 

 Sleeping sickness, 328 

 "Slipper-animalcule,"' 119 

 Slug-worms, 163 



Smell, sense of, 113. See also Scent 

 Smynthurus, 252 

 Snake-flies, 25, 75, 179 

 Snapdragon, fertilisation by insects, 229 

 " Snow fleas," or " worms," 61 

 Social insects, 170, 260, 274 et seq. 

 Soldier ants, 294 



— termites, 302 



Sounds produced by insects, 108 et stq. 



Spangle galls, 203 



" Spanish fly," 83, 332 



Spatkcgaster, 205 



Species, origin of, 37, 39 



Speedwell, germander, fertilisation by 



insects, 229 

 Sphegidce, 99, 267 

 Sphex, 123 

 Sphimgida, S9 

 Sphinx, 89, 133 

 Spiders, as distinguished from insects, 



32 



— Australian " flying," 48 



— as prey of digger wasp, 267, 278 

 Spider-flies, 95, 187 



Spiracles, 3, 312 

 Spring-tails, 60, 318 

 Squama of true flics, 92 

 Stable-fly, 186 

 Stahala, 108 

 Staphylinidce, 78 

 Stauropus, 162 

 Steyomyia, 327 



Stick caterpillars, 132, 134, 137 

 " Stick " insect, 62, 63, 131, 262 

 Sting of insects, 168 et seq. 

 Stinging insects, mimicry by non-stinging 

 species, 149 



— warning coloration of, 146 

 Stipes, 41 



