750 



Amccboid protoplasm, fixation of, 272 

 Amphinematische Stifte, 597 

 Amphipneustic larvae, 28 

 Ampulla, great, 182 



lesser, 182 



Ampull.ir muscle, 182, 220 

 Anal area, 198 



somite, 728, 744, 74$ 

 Analogy of exoskeleton with verte- 

 brate skeleton, 99 

 Andrena, sense of taste in, 630 

 Atiisotropous 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, 122 



special sensory 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. 1 1 

 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, 



401 



Aorta, 637, 638 

 Aortic bulb, 640 

 Aphaniptera, 29 



Apiii-.. amnion of, 243 



primitive band in 245 



sexual organs, development of, 



in, 703 



sexual rudiments in, 248, 251 

 yrl. ntation in, 237 

 Apis rneliiii' a, alum ntary canal, de- 

 velopment of, in, 422 



Apis mellifica, procerebral lobes in 



457 



trachea? of, 353 

 Apodeme, 1 1, 105 

 of labrum, 140 

 of penis, 743 



Appendages. Sec Lateral appen- 

 dages 



Appendicular discs of head, 82 

 Appendicular skeleton, 101 

 Archenteron, 13 



development of, 247 

 Aregmagene Insecten, 256 

 Arnold on intracellular origin of 



leucocytes, 309 

 Arthropods, limbs of, 113 



vision in, 554 

 Arthrous, 101, 102 

 Articulation, kinds of, 101 

 coxo-trochanteric, 193 

 posteiior 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. Sec Chordo- 



tonal organs 



Audouin on metapleuron, 174 

 on thorax, I 55 

 on trochantin, 179 

 views of, 99 



Auricular sinus, 637. Sec Pericar- 

 dium 



Axial threads of great rods, 525 

 Axis of head, changes in, 124 

 Axis cylinder of nerve, 67 

 nuclei of, 289 



I'- \cii.l. I of retina in compound eye, 



533 

 in simple eye, 51 1 



r.nlaincr. >'< 1 1 alter 

 Balbiani on origin of gonads, 690 

 on polar cells, 690 



