INDEX. 
Swammerdam, on circulation of the 
blood, 635 
on imaginal discs, 73 
Swinton on dorsal vessel, 649 
on mirror in Cicadae, 626 
Sylpha, function of antennz in, 
592 
Symphysis, 102 
Synapta, morula of, 239 
Syncytial segmentation, 237 
Syndesmosis, 10, 102, 187. 
Synonymy of head capsule, 126 
of mouth organs, 154 
of thoracic skeleton, 189 
of wing sclerites, 209 
Syrphidze, entocephalon of, 124 
epistoma of, 121 
lunula of, 126 
salivary glands of, 404 
TABANID&, mandibles of, 128 
palpi of, 150 
Tabanus, 30 
chordotonal organs of larva, 596 
Tachina, 5 
abdominal sterna of, 739 
antennz of, 585 
uterus of, 676 
Tactile sense, 499 
Teenia, 470-472 
Tanystomata, 30 
Tapetum, pigmented, 535 
tracheal, 538 
Tarsal articulations, 194 
glands, 198 
muscles, 222 
Tarsus, 194 
Taste, organs of, 403 
sense of, 630 
Tau, 203 
Teeth of proboscis, 146 
Telson of Crustacea, 209 
Tendinous cords of oral sucker, 395 
Tentorium, 215 
rete mirabile of, 216, 396 
Tergum, 156 
Terminal ganglia, 291 
Termites, gills of, 160, 356 
Testis, 660 
development of, 687, 691 
early stages of, 687 
Thalamencephalon, 444 
Thalamon, 444 
Theca, 135 
773 
Thoracic appendages, development 
of, 158 
blood sinuses, 225 
discs. See Imaginal discs. 
ganglion, 435, 437, 439 
in nymph, 345 
muscles, 223 
nerve centre, 435, 437, 439 
sclerites, 171 
nomenclature of, 166 
segment, ideal of, 156 
skeleton, 154, 166 
bibliography of, 154 
morphology of, 154 
spiracles. See Spiracles 
Thorax, 11 
anterior surface of, 169 
contents of, 217 
development of, 83, 318 
dorsal aspect of, 166 
evagination of, 317 
lateral aspect of, 167 
modifications of, 165 
posterior aspect of, 170 
theory of, 156 
ventral appendages of, 158 
ventral surface of, 169 
Thyroid sclerite, 141, 142 
Thysanura, 18 
trachez of, 357 
Tibia, 193 
Tichomirow on primitive trace, 
253 
Tiger beetle. See Cicindela. 
Timarchia, ocelli of, 514 
Tipula, 30 
anterior gonapophyses of, 732 
eye of, 521 
halter of, 606 
mouth of, 150 
Tissue elements, 263 
Tissues, classification of, 263 
Topography of muscles and viscera, 
215 
Topping, preparation of proboscis 
by, 142 
Torulus, 117, 121 
Total reflection, vision by, 563 
Trabecule, 112, 445, 461, 464 
Trabecular bundle, 467 
Trachee, 11, 47, 351 
abdominal, 226 
appearance of, 364 
arborescent, 353 
