768 
Paranucleus in sperm-cells, 695, 697 
Paraphallus, 741, 742 
Paraphyses, 141, 143 
Paraphysal muscles, 393 
Parapteron, 183, 203 
muscles of the, 220 
Parascutum, anterior, 176 
posterior, 176 
Paratreme, 170, 178 
Parker on development of the retina, 
542 
Parovarium, 672 
development of, 705 
function of, 710, 718 
Pars basilaris, 123 
Parthenogenesis, 723 
theory of, 238 
Passalus, coxz of, 191 
Patagium, 198 
Patten on compound eye, 520, 522 
on cones of Mantis, 531 
on eyes of Arca, 505 
on eyes of Pecten, 507 
on nervous system, 441 
on segmentation of thorax, 157, 
180 
Pectoral sclerites, 178 
Pedicle of procerebral lobes, 456 
Peduncle of corpus centrale, 458 
of procerebral lobes, 456 
Pelobates, ovary of, 711 
Penis, 734, 740 
Pepsis, maxilla of, 133 
Pericardial cavity, 637 
development in embryo, 252 
Pericardial cells, 647 
experiments on, 343 
in nymph, 343 
Pericardial plexus, 642 
Pericardial septum, 642 
in larva, 89 
Pericardial trachea, 650 
in Ctenophora, 88 
Pericardium. Sze Pericardial cavity 
Peripatus, segmental organs of, 253 
segmentation of yelk in, 237 
tracheze of, 357 
Peripheral nerves, development of, 
328, 492 
Periplaneta. See Blatta 
Peripneustic larvae, 28 
Peritoneal tissues, 670 
Peritreme of spiracle, 49 
Perla, hermaphrodism in, 658 
INDEX. 
Perris on function of antenna, 590, 592 
on olfactory sense, 498 
Petasia, protandry in, 723 
Pettenkofer’s reaction, 415 
Pettigrew on flight, 206 
Peyron on analysis of tracheal air, 
375, 382 
Phagocytes, 273 
Pharyngeal nerve, 63 
sete, 404 
sinus, 46 
tube, 137 
Pharynx of imago, 154, 137, 390 
function of, 390 
of larva, 43 
function of, 46 
Pheidole, eyes of, 516 
Phronomidee, eyes of, 563 
Phryganea, development of, 256 
Phytophaga, maxilla in, 133 
Picrocarmine and eosin, use of, 348 
Pieris, development of gonads in, 692 
Pigment cells of dioptron, 530, 531 
Pilzstiel, 461 
Planta, 194, 195 
Plaques of Dufour, 73 
Plastron, 168, 171 
Plateau on sense of smell, 593 
on vision, 567 
Platygaster, origin of gonads in, 686 
Pleural region, 181 
Pleuron, 156, 182 
Plume moth, See Pterophorus 
Poculum of proboscis, 144 
Podical plates, 736 
Polar bodies, 714 
cells. See Polar globules 
Polar globules, 238, 248, 714 
Pollenia, 30 
Polyblasts, 694 
Ponera, eyes of, 516 
Porchinski on Musca corvina, 31 
Pore-canals, 282 
Pore-plates, 588 
Poriferous chordotonal organs, 597 
Post-dorsum, 186 
Posterior gonapophysis, 733, 742 
spiracle of larva, 49 
thoracic diarthrosis, 171 
thoracic spiracle, 171, 188, 373 
wing-root, 199, 221 
Post-oral appendages in embryo, 257 
Post-oral ganglia, 63 
development of, 493 
