INDEX 



727 



Spermatogonium, 498. 



Spermatophore cap, 499. 



Spennatophores, 497, 499. 



Spermatozoa, 497, 525 ; formation of, 

 498. 



Sperm-nucleus, 525. 



Sphinx, 456, 552; moulting of, 610. 



Sphinx ligustri, changes during meta- 

 morphosis, CM. 



Spilosoma, 391. 



Spindle,, directive, 525. 



Spines, 187, 189; glandular, 190; helco- 

 dermatous, 612 ; locomotor, (512; moult- 

 ing, (i!2; poisonous, 189. 



Spinneret, 342; of caterpillars, 75. 



Spinning apparatus, 340 ; at end of body, 

 341) : glands, 339 ; process of, 340. 



Spinules, 189, 197. 



Spiracles. 437 : types of, 438. 



Spiral thread, 444; absence of , 447; ori- 

 gin of, 448. 



Spraying apparatus, 370. 



Spring of Collembola, 551. 



Spuler, on pigments, 207, 208; on struct- 

 ure of scales, 195, 197. 



Squama, 123. 



Squama?, 1_'4. 



Squamula. 124. 



Squamule, 89. 



Stadia of metamorphosis, 594. 



Stage, carabidoid, G92; gastrula, 535; 

 metabolous, 594; resting, 707; scara- 

 ba-idoid, 692. 



Stages, ametabolous, 594. 



Stagmomantis Carolina, embryo of, 584 ; 

 hatching of, 584. 



Staphvlinus, 61, 454. 



Stenobothrus sibiricus, swollen fore- 

 tarsus in male, 113. 



Stenosternus, 101. 



Sternum, 87, 89. 



Sii-mata, \:'<7 : closed, 460; closing ap- 

 paratus of. 441: mesothoracic, 462; 

 number of, in the embryo, 554 ; number 

 of pairs of, 439, 461; position of, 440; 

 vestigial, 4(10. 



Sting, bee's, 172. 



Siipes, 6:'.. 



Stokes, on the tn>nidia, 445; hairs in, 451. 



Stomach, chyle, 314, 325; absorbent cells 

 of, .".28 : glandular cells of, 327 ; forma- 

 tion of, in imago fly, 681, 682; origin 

 of, 569. 



Stomach-mouth, 309. 



Stomodaeum, 537, 547, 569. 



Stomoxys, 446. 



Strauss-Diirckheim, on the heart, 397 ; on 

 muscles of cockchafer, 213. 



Streak, embryonal, 531 ; primitive, 531. 



Streblopus, 101. 



Striae of scales, 194, 202. 



Styles, abdominal, 176 ; of ovipositor, 

 167. 



Stylopidse, 486 ; hypermetamorphosis of, 

 695. 



Stylops childreni, triungulin larva of, 

 695. 



Subgalea, 73. 



Submentum, 54, 63, 68, 69. 



Substance, fibrillar nerve, 238. 



Sucking stomach, 302, 305. 



Supra-anal plate, 181. 



Supra-oesophageal ganglion, 231. 



Supra-spinal vessel, 403. 



Suraual plate, 181. 



Surroundings, physical, 463. 



Sustainers of the pupa, 638. 



Swammerdam, on discovery of air-sacs, 

 456 ; on germs of wings, 128 ; on the 

 mechanism of pupation, 661 ; on meta- 

 morphosis, 599 ; on rectal respiration, 

 463. 



Swimming, act of, 116. 



Syniphyla, 18 ; characters of, 22. 



Synaptera, 27, 534, 594, 705. 



Syroniastes, 372. 



Tabanus, 629 ; mouth-parts of, 79. 



Tiienidia, 444; origin of, 447, 448. 



Talasporia, 634. 



Talocera, 57. 



Tanypus, 472. 



Tarsus, 96; changes of, from larva to 



imago of Lepidoptera, 655; reduction 



in or loss of, 101, 102. 

 Taste, organs of, 281. 

 Tegeticula yuccasella, 65, 66. 

 Tegmina, 124. 

 Tegula, 89, 124, 125. 

 Telea polyphemus, amount of food eaten 



by, 608 ; cocoon of, 621 ; moulting of, 



610: thorax of, 88. 

 Teleas, hypermetamorphosis of, 703. 

 Telephorus, 111, 538; teneut hairs of, 99. 

 Tenebrio, 617. 

 Tenent hairs, li'.t. 

 Tentacle of maxilla, 65. 

 Tentorium, 49. 



