768 



INDEX. 



Paramicleus in sperm-cells, 695. 697 

 I'.iraphallus, 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, coxa: of, 191 

 Patagium, 198 

 Patten on compound eye, 520, 522 



on cones of Mantis, 531 



on eyes of Area, 505 



on eyes of Pecten, 507 



on nervous system, 441 



on segmentation of thorax, 157, 



i So 



Pectoral sclerites, 178 

 Pedicle of procerebi al 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. Sec Pericardial cavity 

 Peripatus, segmental organs of, 253 



segmentation of yelk in, 237 



trachea; of, 357 

 Peripheral nerves, development of, 



328, 492 



Periplaneta. See I'.Iatta 

 Peripneustic larva-, 28 

 Peritoneal tissues, 670 

 IVritreme of spiracle, .\<i 

 I'eila. bermaphrodism m, 



Perrison function of antenna, 590, 592 



on olfactory sense, 4<)S 

 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 



setce, 404 



sinus, 46 



tube, 137 



Pharynx of imago, 154, 137, 390 

 function of, 390 



of larva, 43 



function of, 46 

 Pheidole, eyes of, 516 

 Phronomidie, 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 

 Planla, 194, 195 

 Plaques of Dufour, 73 

 Plastron, 168, 171 

 Plateau on sense of smell, 593 



on vision, 567 



Platygaster, origin of gonads in, f>86 

 Pk'ural region, 181 

 Pleuron, 156, 182 

 Plume moth. Sec Pterophorus 

 Poculum of proboscis, 144 

 I'tiilical plates, 736 

 Polar bodies, 714 



cells. .s<v 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, iSS, 373 



wing-root, 199, 221 

 Post-oral appendages in embryo, 257 

 Post-oral ganglia, 63 



development of, 493 



