77- 



1NDEX. 



Simulia. 1 54 



development of, 254, 256 

 mouth of, 1 54 



Sinus, pericardial, of larva, 87. See 

 Blood sinus, Pericardial sinus 

 Sirex, ovipositor of, 733 

 Sitaris, metamorphosis of, 18 

 Skeletal muscles, development of, 287 

 Skeletal structures of proboscis, 127 

 Skeleton, appendicular, 101 



somatic, 101 



Smaller house-fly. 6V<?Muscacorvina 

 Somatic nervous system, 8, 62, 433 



of larva, 67 

 Somatic skeleton, 101 

 Somatopleure, 16 



development of, 251 

 segmentation of, 252 

 Somites, 8 



number of, in embryo, 15 

 primary, 157 



Sound-producing organ, 217, 595 

 Sound-waves, Airy on, 619 

 Specific characters of Blow-fly, 31 

 Sperm and Germ development com- 

 pared, 719 

 Spermatheca, 677 

 Spermato^enesis, 692, 720 

 Spermatospores, 693 

 Spermatozoa, 695, 697 

 movements of, 698 

 Sphinx euphorbia-, eye of, 527 



ligustri, aorta of, 638 

 Spiracles, 12, 319, 358 



abdominal, 359, 363, 373 

 anterior of larva, 50 

 anterior thoracic, 167, 361 

 in Coleoptera, 181 

 order of succession of, 372 

 inter-scgmental, 181, 319, 359 

 mechanism of, 361 

 median thoracic, 188 

 nomenclature of, 180, 358 

 posterior, of larva, 49 



development of, 369 

 posterior thoracic, 171, 188,373 

 segmental, 359 

 thoracic, 359 

 tympanic, 358, 363, 624 

 upper prothoracic disc. 



acular disc 



vestibule of, 50, 352, 361 

 Spiracular disc, 84, 316, 319 

 sac, 352, 353 



Spiracular trunks, 225 

 Spiral thread of trachea, 355 

 Splanchnic nervous system, 65, 92 

 Splanchnoblast, 22 

 Spongioplasm, 264 

 Squama, 165 

 Squamuia, 165 

 Staining, methods of, 95 

 Stapbylinidae, larvae of, 18 

 Stemma, stemmata. See Ocellus 

 Stenobothrus, segmental organ of, 



277 



Sterno-dorsal muscles. See Muscles 

 Sterno-pleural suture, 168 

 Stign-.atic discs. See Spiracular disc. 

 Stigmatic cornua, 319 



in Corethra, 370 

 Stigmatic plate of larva, 369 

 Sting of Hymenoptera, 729, 731, 734 

 Stomal plate, 143 

 Stomodeum, 13, 422 



cuticle of, 282 



development in nymph, 315 



of nymph, 346 

 Stomogastric nerve, 57, 65 



development of, in pupa, 494 

 Straus Durckheim on homologies of 

 muscle, 219 



on leg muscles, 221 



on mechanism of dorsal vessel, 

 650 



on wing muscles, 220 

 Strieker on origin of nuclei, 717 

 Stroma of nerve centres, 66 

 Stuhlmann on egg, 713 

 Sub-corneal image, 555, 558 

 Sub-corona, 471 

 Sub-dioptric space, 545 

 Sub-epaulet, 201 



Sub-hypodcrmal cells of larva, 37 

 Suckers of proboscis, 394 

 Suckow on origin of gonads, 685 

 Suction, act of, 399 

 Supra-cesophageal nerve centres, 448, 



475 

 Supra-tympanic fissure, 176 



organ, 60 1, 625 

 Sutures, 101 



median, 102 



morphology of, 103 



sterno-pleural, 168 



transverse ventral, 169 

 Swarnmerdam on alimentary canal 

 of Bee larva, 422 



