758 
Fulcrum of imago, 137 
of larva, 44 
See Pharynx 
Furca, 143 
muscles of, 392 
Furlonge on movements of tracheal 
vessels, 383 
GALEA, 133, 134, 150, 152 
in Cicindela, 133 
Gammarus, ventral appendages of, 
129 
Ganglia, cells of. See Nerve-cells 
development of, 494 
intestinal, of larva, 59 
number in Diptera, 64 
optic, 469 
pharyngeal, 93 
primitive, 64 
sensory, 443 
thoracic, 435 
Ganglio-genetic cells, 480 
Ganglion en coin, 471 
a cotes de melon, 72 
Ganin on development, of Gonads, 
686 
of imaginal discs, 74, 76 
of integument of abdomen, 
328 
of mesoblast, 335 
Ganin’s ring, 58, 427 
Gases, partial pressure of, 382 
Gaskell, hypothesis of, 99, 110, 441 
Gastric glands, 54 
Gastrula stage, 240 
of Amphioxus, 247 
of Echinoderms, 247 
Gastrulation, 240 
Gegenbauer on tracheal gills, 356 
on wings, 161 
Generative aperture, position of, 727 
Generative armature of male and 
female compared, 726 
Generative organs, 658 
bibliography of, 658 
See also Internal and External 
generative organs 
Genital. See a/so Generative 
Genital cord, 687, 704 
Genital fossa, 675, 677 
Genital spine, 675 
Germ, 12 
relation to vitellus, 236, 707 
INDEX. 
Germ gland. See Germogen 
Germ ova, 675 
development of, 718, 720 
Germinal spot, 707 
Germinal vesicle, 707 
Germogen, 709, 721 
Gerstfeldt on fulcrum, 138 
Gills. See Tracheal gills 
Gilson on spermatogenesis, 693, 696 
Glands of fly’s foot, 198 
Glands, wax, 279, 352, 360 
Gleichen on halter, 615 
on proboscis, 398 
Glomeruli of olfactory lobe, 468 
Glosso-olfactory bundle, 468 
Glosso-pharyngeal apophysis, 
I4o 
Glycerine, mounting objects in, 214 
Glycogen in Malpighian tubes, 416 
Gnat. See Culex 
Gonads, 659 
origin of, 684 
in Aphides, 248, 251 
in Cecidomyia larva, 689 
Gonapophysis, 659, 728 
anterior, 732 
posterior, 733 
Gosch on Latreille’s segment, 189 
on spiracles, 181 
Gottsche on mosaic vision, 555 
Graber on antenna, 592 
on chordotonal organs, 595 
on development of fat bodies, 
236 
head discs, 261, 300 
on dorsal vessel, 644 
on hearing in Insects, 498 
on Malpighian tubes, 414 
on nymph, 300 
on ovary, 671 
on pericardial septum, 646, 
on ptycoblasts, 243 
on segmentation cavity, 252 
on special nerve organs, 609 
on thorax, 165 
on tracheal gills, 160 
on wing organs, 620 
Graber, organ of, 601 
Gracilis muscle, 221 
Graff on Rhabdoceelia, 722 
Graham on transpiration, 382 
Granule cells, 273, 297 
Gray cortex of nerve centres, 67 
of thoracic ganglion, 438 
138, 
