INDEX. 
Verschluss Biigel, 363 
Verson on development of wings, 21 
Vesicular condition of nervous sys- 
tem, 487 
Vespa, brain of, 440, 459, 462 
sense of taste in, 631 
Vestibule of trachea in larva, 50 
Viallanes on brain of Insects, 440 
on central nervous system, 70, 
442 
on cerebron of Cricket, 454 
on chaplet cells, 533, 534 
on corpus centrale of Cricket, 
459 
on development 
Mantis, 480, 488 
on dorsal vessel of larva, 91 
on ganglia of intestine, 59 
on ganglion a cétes de melon, 72 
on mantle layer of brain, 484 
on morphology of discs, 74 
on nerves, structure of, 288 
on optogenic cells, 547 
on sub-hypodermal cells, 37 
on white nerve substance, de- 
velopment of, 486 
Vibrations of the wing, 203 
Vibrissze, 10 
Virchow on origin of cells, 716 
Visceral arches and Arthropod limbs, 
113 
Visceral muscles, 283 
Visceral muscular network, 59 
Visceral nervous system, 57, 65, 494 
Vision, acuteness of, 567, 569 
binocular, 571 
effect of movement in, 571 
experiments on, 567 
extent of field of, 566 
in diurnal Lepidoptera, 497 
organs of, 501 
in Géstrus larva, 71 
Vitelline membrane, 12, 683 
- Vitellus. See Yelk 
Viviparous Flies, 5 
habits of Musca corvina, 31 
Voeltzkow on polar cells, 248 
on primitive band, 243 
Volucella, entocephalon of, 124 
lunula of, 126 
proboscis, development of, in, 
of brain in 
terminal abdominal segments of, 
73° 
775 
Volucella, wing muscles of, 220 
Voluntary acts, 475 
Vorderhorn, 464 
Vorderkopf, 114 
Wasp. See Vespa 
Watery vapour an olfactory stimulant, 
594 
Wax glands, 279, 352, 360 
Weinland on functions of halteres, 
616 
on scapal papillae, 610 
on special organs of halter, 610 
Weismann on alimentary canal, 311 
on blastoderm, formation of, 233 
on cell chaplets, 61, 91 
on central nervous system of 
larva, 68 
on compound eye, 543 
on development of cornea, 528 
of Diptera, 1 
of larva, 259 
on dorsal vessel, 92, 644 
on Faltenblatt, 244 
on germinal vesicle, 712 
on gonads, origin of, 686 
on great rods of eye, 544 
on halter, 603 
on imaginal discs, 3, 21 
on Malpighian tubes, 424 
on mouth organs of larva, 38 
on nervous system, 491 
on neuroblast of larva, 68 
on nutrient cells of egg, 702 
on nymph, 317 
on optic disc, 80 
on optic ganglia of nymph, 492 
on polar cells, 238 
of Chironomus, 248 
on pharynx of larva, 43 
on proboscis, 130 
on procephalic lobes, 259 
on prothoracic spiracle, 181 
on ring of larva, 78 
on thoracic appendages, 158 
on trachea, 48, 354 
on tracheal capillaries, 49 
on visceral muscular network, 59 
West, Tuffen, on Fly’s foot, 196 
Wheeler on development of nervous 
system, 480 
Wielowiejski on Oinocytes, 276 
on parablast, 236 
Will on amnion in Aphis, 243 
