482 
Schwarz, on distribution, 378, 380; 
myrmecophilism, 343; 462 
Schwedt, 445 
Sclerite, 29 
Scolopendra, *4 
Scolopendrella, *6, 22 
Scudder, on albinism, 201; coloration, 
210; fossil insects, 385, 386, 390, 
391, 392; glaciation, 370; mimicry, 
227; Orthoptera of Galapagos Ids., 
3471, 374; spread of P. rape, 381; 
stridulation, 106; 409, 418, 421, 
22, 426, 446, 462, 464, 465 
Scutellum, *48 
Scutum, *48 
Seasonal coloration, 201 
Second maxille, the term, 39 
Sedgwick, 412 
Segmentation, of arthropods, 27; germ 
band. *rao;'*rs50, *152; head, -44; 
*46 
Segments of abdomen, 65, 66 
Seitz, 447, 454, 458, 459, 462 
Sematic colors, 234 
Seminal, ducts, *140, 141; receptacle, 
*T ar, *142; vesicle, *140, 142 
Semon, 463 
Semper, C., on scales, 78, 421 
Semper, K., 461 
Sempers, 465 
Sense organs, 94 
Sensilla, 94, *95 
Serosa, *148, 149, *153 
Sessiliventres, 20, *21 
Setaceous, *34 
Sete, modifications of, 76 
Seventeen-year locust, 
moults, 165 
Sexual coloration, 205 
Sharp, on Atta, 335 ; Hawaiian beetles, 
372; metamorphosis, 177; 410, 412, 
419, 435, 445 
Sheath, *70 
Shelford, 451 
Siebold, von, 426, 436 
Silk, 85 
Silk glands, 83, *84, *85 
Silkworm (see Bombyx mori) 
Sitlpha, distribution of, 370 
Silurian insects, *385 
Silvestri, on Anajapyx, *6 
Simmermacher, 422 
Simulium, 276; respiration, *190 
Sinclair, 412 
Siphonaptera, 19, *21; 
*25 
Sirex, ovipositor of, *70 
Sirodot, 421, 429 
number of 
origin of, 24, 
INDEX 
Sitaris, 174 
Size of insects, 27 
Skink 73 
Skull, *29 
Skunk, insectivorous, 280 
Slingerland, on losses through insects, 
394; 403, 405 
Smell, 98; end-organs of, *99, *100, 
*TOI 
Sminthurus, *9, to 
Smith, J. B., 405, 415, 416, 465 
Smith, T., on Texas fever, 306 
Snodgrass, on Orthoptera of Galapa- 
gos Ids., 371, 374 
Snow flea, *9 
Soldier, ants, 330; 
Sollmann, 418 
Somatic cells, 146 
Somatogenic variations, 241 
Sorensen, 413 
Sounds, 103 
Species, origin of, 245 
Spence, 410, 411 
Spencer, 452 
Spermatheca, *141, *142 
Spermatogenesis, 146 
Spermatophores, 142 
Spermatozoa, *141, 142 
Sperm-nucleus, *146 
Speyer, on hermaphroditism, 143 
Sphecina, 315 
Sphecius, 315 
Sphex, *263; behavior of, 359, 362, 
*363 
Sphingide, as pollenizers, 262, *266 
Sphinx, alimentary tract of, *119; dis- 
termites, *316 
persal, 367; pulsations of heart, 
128; transformation, *182 
Spichardt, 437 
Spines, 76 
Spinneret, *84 
Spiracles, closure of, *136; number, 
66, 136 
Spirobolus, *3, 4 
Spongioplasm, 87 
Sporotrichum, 259 
Spuler, on scales, 78; 417, 423, 448 
Spur, *53 
Squama, 58 
Squash bug, metamorphosis of, *158 
Stadium, 159 
Stagmomantis, leg of, *53 
Standfuss, temperature 
of, 205, 373; 448 
Stefanowska, on pigment, 113, 428 
Stegomyia, in relation to yellow fever, 
304 
Stein, 436 
experiments 
