75° 
Ameeboid protoplasm, fixation of, | 
Amphinematische Stifte, 597 
Amphipneustic larvae, 28 
Ampulla, great, 182 
lesser, 182 
Ampullar muscle, 182, 220 
Anal area, 198 
somite, 728, 744, 746 
Analogy of exoskeleton with verte- 
brate skeleton, 99 
Andrena, sense of taste in, 630 
Anisotropous substance, 285 
Annuli, 8 
Antenna, 582 
auditory function of, 591 
bibliography of, 582 
development of, 322 
functions of, 122, 585, 592 
hygroscopic function of, 593 
minute structure of 587 
morphology of, 108 
olfactory function of, 582, 585, 592 
position of, 12 
special Senne organs of, 584 
tactile function of, 595 
Antennal bristle, 122 
Antennal ganglion, 445 
of larva, 71 
of nymph, 327 
structure of, 467, 468 
Antennal insects, 11 
Antennal ridge, 121 
Anterior abdominal fold, 303, 318 
Anterior gonapophysis, 733, 739 
Anterior legs, function of, 191 
Anterior parascutum, 176 
Anterior spiracle. See Spiracle 
Anterior tubercle, 461, 464 
Anterior ventricle of brain, 449 
Anterior ventricle of dorsal vessel, 
640 
Anthony on suckers of proboscis, 
394, 401 
Aorta, 637, 638 
Aortic bulb, 640 
Aphaniptera, 29 
Aphis, amnion of, 243 
primitive band in 245 
sexual organs, development of, 
in, 703 
sexual rudiments in, 248, 251 
yelk segmentation in, 237 
Apis mellifica, alimentary canal, de- 
velopment of, in, 422 
INDEX. 
Apis mellifica, procerebral lobes in 
457 
tracheze of, 353 
Apodeme, If, 105 
of labrum, 140 
of penis, 743 
Appendages. See Lateral appen- 
dages 
Appendicular discs of head, 82 
Appendicular skeleton, 1or 
Archenteron, 13 
development of, 247 
Aregmagene Insecten, 256 
Arnold on intracellular origin of 
leucocytes, 309 
Arthropods, limbs of, 113 
vision in, 554 
Arthrosis, 101, 102 
Articulation, kinds of, ror 
coxo-trochanteric, 193 
posterior coxo-sternal, 192 
tarsal, 194 
Ascaris, spermatogenesis in, 720 
Astacus, archenteron, development 
of, in, 249 
brain of, 443 
compound eye of, 506 
optic ganglion of, 540 
retinula of, 522 
Atrium of trachea, 352 
Atta, eyes of, 516 
Auditory and olfactory end-organs, 
development of, 508 
Auditory mechanisms, 595, 629 
Auditory perceptions, 630 
Auditory rods, 596, 597. See Chordo- 
tonal organs 
Audouin on metapleuron, 174 
on thorax, 155 
on trochantin, 179 
views of, 99 
Auricular sinus, 637. 
dium 
Axial threads of great rods, 525 
Axis of head, changes in, 124 
Axis cylinder of nerve, 67 
nuclei of, 289 
See Pericar- 
BACILLI of retina in compound eye, 
* 533 
in simple eye, 511 
Balancer. See Halter 
Balbiani on origin of gonads, 690 
on polar cells, 690 
