760 
Henking on germinal vesicle, 713 
on micropyle canal, 682 
on nuclear changes in ovum, 715 
on nutrient cells of egg, 702 
Hensen on eye of Nautilus, 508 
Hepato-pancreas, 417 
Hermaphrodism, 658 
Herold on abdominal ganglia, 439 
on dorsal vessel in pupa, 340 
on micropyle canal, 682 
on origin of gonads, 685 
on parovarium, 674 
Hertwig on mesenchyme, 235 
on spermatogenesis, 693, 694, 
719 
Hicks on function of halter, 615 
on special end-organs, 609 
on wing organs, 620 
Hickson on compound eye, 523 
on development of cornea, 527 
Hilaire, G. de St., views of, 99 
Hind-gut. See Metenteron. 
Hinterast, 461 
Hippoboscidee, 30 
His on origin of sensory end-organs, 
508 
on parablast, 235 
Histoblast, 22 
Histoblasts in chyle stomach of 
larva, 58, 311 
Histology of tissues, 262 
bibliography of, 262 
Leydig on, 47 
Histolysis, 22, 23, 273, 297 
of alimentary canal, 311 
of fat bodies, 30/ 
of hypodermis, 299 
of larval muscles, 297 
of muscle nuclei, 299 
of salivary glands, 310 
Hofer on visceral nerves, 65 
Holoblastic ova, 236, 707 
Homoptera, cephaloccele in, 115 
Honey-bag of Bee, 52 
Hooks of larva, 40, 45 
Humerus, 169 
Humming of Diptera, 627 
Hurst on functions of antenna, 592 
on spiracles of Culex, 370 
Huxley on development of archen- 
teron in Astacus, 249 
of utero-vaginal tube, 703 
on homologies of external gene- 
rative organs, 726 
INDEX. 
Huxley on nomenclature of layers of 
skin, 9 
on procephalic lobes, 110 
Hyaloplasm, 264 
Hybernation, 6 
Hydrophilus, dorsal organ of, 255 
entosternum of, 481 
nervous system of, 479 
tracheze development of, 353 
Hygroscopic function of antennae, 
593 
Hylotoma, embryo of, 246 
Hymenoptera compared with Dip- 
tera, 26 
development of eye in, 543 
gonapophyses of, 728, 733 
hind-gut of, 423 
labium of, 14 
male organ of, 728 
median segment of, 1£8 
metamorphosis of, 20 
mouth organs of, 128 
operculum of, 179 
ovipositor of, 731, 734 
sting of, 729, 731 
wings of, 164 
Hyoid sclerite, 148 
Hyper-metamorphosis, 18 
Hyperia, ommateum of, 548 
Hypoblast, 13 
origin ot, 247 
Hypoderm, 8, 37 
cells of the, 278 
histolysis of, 299 
of larva, 37 
Hypoglossa, 141, 143 
Hypophallus, 741 
Hypopharynx, 137, 147, 154 
errors regarding the, 132 
of larva, 44 
Hypopleural suture, 168 
Hypopterygium, 202 
Hypostomal sclerite, 44 
Hypotreme, 173 
[DEAL thoracic segment, 156 
Imaginal discs, 21 
abdominal, 329 
anterior spiracular, 84 
appendicular, of head, 82 
bibliography of, 72 
causes of immunity to histolysis, 
310 
