77° 
Pupa sheath, 330 
stage, 3 
See Nymph 
Pupiparze, 29, 30 
development of alimentary canal 
in, 423 
of nervous system in, 482 
of trachea in, 354 
number of ventral ganglia in, 65 
Pygidium, 629 
functions of, 629 
Pyramidal ganglion, 466, 748 
development of, 494 
Pyrrhocoris, dorsal organ of, 255 
Rabl-Riickhard on corpora fungi- 
formia, 446 
Ranvier, nodes of, 289 
Raphé, 3 
Reaumur on act of suction, 399 
on ecdysis, 21 
on proboscis, 400 
on respiration, 376 
Receptaculum seminis, 677 
Rectal glands, 54 
Rectal papilla, 417 
function of, 420 
morphology of, 420 
nerves of, 420 
pulsations of, 421 
secretion of, 421 
trachez of, 419 
Rectal valve, 428 
Rectum of imago, 412 
of larva, 58 
Recurrent nerves, 63 
Rees, Van, on changes in 
nymph, 314 
crop of 
on development of dorsal 
muscles, 336 
on development of salivary 
glands, 431 
on metamorphosis, 300 
on morphology of imaginal 
discs, 304 
on origin of imaginal discs, 261 
on pro-nymph, 300 
Reflex acts in Crustacea, 475 
Refractive cylinders, 559 
Refractive index of compound cornea, 
Regmagene Insecten, 256 
Regnault and Reiset on respiration, 
373 
INDEX. 
Rejewsky on generative organs, 663 
Remigium, 199, 201 
Respiration, act of, 224, 373 
abdomen, movements of, in, 376 
absorption of oxygen in, 380 
activity of, 373 
excretion of COs, in, 381 
muscles of, 222, 377 
organs of, in imago, 22 
in larva, 47 
physiology of, 373 
Respiratory quotient, 374 
Rete mirabile, 216, 396 
Retina, 533 
continuous, 541 
development of, in pronymph, 
326 
in nymph, 552 
distal of Parker, 531 
historical and critical observa- 
tions on, 541 
of compound eye, 517 
of Neuroptera, 541 
of Noctuids, 541 
of simple eye, 510, 523 
origin of, from cerebron, 494 
segregate, 541 
trachee of, 538 
Retinal disc, 326 
in larva, 70, 81 
Retinal end organs, 506 
absent in nymph, 549 
development of, 553 
non-inversion of, 553 
Retinula, 520, 533 
Retractor muscle of frontal sac, 217 
Rhabdoccelia, generative organs of, 
721 
Rhabdome, 517 
in immature Diptera, 550 
morphology of, 550 
origin from mesoblast, 549 
See Great rods 
Ring in larva, 77 
Rings of pseudo-trachez, 393 
Roberts’ macula, 272 
Robin on polar bodies, 714 
Robineau-Desvoidy on halter, 616 
on Myodaires, 107, 119 
on proboscis, 130 
Rods and cones. See Bacilli of retina 
Rostellum, 139 
Rostrum, 134, 136, 148, 154 
muscles of, 392 
