r-26 



INDEX 



Sacs, air, 451!; use of, 457; coxal, 14; 

 eversible, 369; Lypodermal, G53. 



Saliva, 324; poisonous, 359. 



Salivary duct of Stomoxys, 440 ; glands, 

 331, 570 ; glands, formation of imaginal 

 during metamorphosis, 683 ; homo- 

 logues of coxal glands, 337 ; modified, 

 337 ; segmental arrangement of, 331. 



Savigny on epipharynx, 43; on homo- 

 logies of appendages, 39, 71. 



Saw-fly, 374. 



Scale-hairs, 198. 



Scales, 187, 193, 202; battledore, 198; 

 development of, 195 ; distribution of, 

 193; of fly's wing, 124; scent, 198; 

 flattened, 193 ; striae of, 194, 202. 



Scape, 57. 



Scent-glands, 39. 



Scent-scales, 198. 



Scepsis, 618. 



Schseffer, on blood, etc., in the pupal 

 wings, 14(i; the fat-body, 420; leuco- 

 cytes, 421 ; on origin of scales, 196 ; on 

 the rudimentary wings, 128. 



Schatz, on colors of butterflies, 202. 



Schiemenz, on salivary glands of bees, 

 334. 



Schindler. on urinary tubes, 351. 



Schiodte on blood-gills, 475. 



Schmidt, on the metamorphosis of male 

 Coccidae, 640; Scolopendrella, 21, 24. 



Schneider, on the funnel of the proven- 

 triculus, 313; 011 sperinatophores, 500. 



Sciara, 348, 636. 



Sclerites, cervical, 46. 



Scolopendrella, 18; the ancestor of in- 

 sects, 17 ; spinning glands, 346. 



Scudder on the glazed eye of pupal but- 

 terflies, 631. 



Scutellum, 87. 



Scutum, 87. 



Secretion, definition of, 327; mechanism 

 of, 326; products of, 329. 



Sectores coconis, 634. 



Segment, antennal, 227; deutocerebral, 

 'I'll: intercalary, 51; median, 90, 163; 

 premandibular, 51, 52, 228; procere- 

 bral, 231. 



Segmental arrangement of genital glands, 

 486. 



Segments, number of, in head, 50, 68, 

 227, 229: i.ptic, 231; origin of, 542. 



Seirarctia, 618. 



Selandria larva, mouth-parts of, 68. 



Seminal ducts, 496. 



Semipupa, 691. 



Semper, ground-membrane of, 136 ; on 

 origin of hair-scales, 195. 



Sense organs, special, in flies, 293. 



Sensory organs, 249. 



Serosa, 532. 



Setae, 188. 



Sexual differences, secondary, 59, 99, 101, 

 114; openings, double, 486, 4 ( .K), 491. 



Sharp, on causes of segmentation of 

 Crustacea, 33 ; on cervical sclerites, 46 ; 

 on steruites, 92 ; homologies of elytra, 

 126. 



Sheep-tick, 507 ; post-embryonic changes 

 of, 686. 



Sialidse, 602. 



Sialis, 462, 468. 



Siebold, organ of, 290 ; on spermato- 

 phores, 500. 



Silk, 340; composition of, 346. 



Silk-fibre, composition of, 346. 



Silk-gland, 339; anal, 346; appendages 

 of, 345; histology of, 3:>4 ; modified 

 coxal glands, 346 ; moulting of, 345. 



Silkworm, 331, 339, 366; amount of food 

 eaten by, 608; functional salivary 

 glands of, 331 ; mode of escape of, from 

 its cocoon, 635; Polyphemus, G21 ; vo- 

 racity of, 608. 



Simmermacher, on feet of insects, 113. 



Simulium, 668, 678 ; hypopharynx of, 78 ; 

 wing-germs of, 129. 



Sinclair on double segments of Diplopods, 

 14. 



Sisyra, abdominal appendages of, 164. 



Sitaris, 691. 



Slug-worm, 188. 



Smell, experiments on, 269; organs of, 

 264, 271 ; physiology of, 268 ; sense of, 

 368. 



Smith, on lack of fore-tarsi in a moth, 

 102 ; jointed structure and lacinia of 

 mandibles, 61 ; maxilla, 65, on scent- 

 glands, 391. 



Sole, extensor, 116. 



Somites, 30. 



Sorby, on change of color in Aphides, 205. 



Si ninds, 293. 



Specius, 585. 



Spengel, on color sense, 260. 



Spermatheca, 506. 



Sperm atid, 49S. 



Spermatocyte, 498. 



