INDEX 



725 



I'rort'phalic lobes, 544. 

 Proctodseum, 537, 547, 569. 



I'rodoXUS, lil)l i. 



I'mgoneate myriopods, 21. 

 I'roimtum, 87. 

 I'romicleus, 526. 

 Propodeiim, 163. 

 Propupa, 627. 

 Prosopistoma, 467. 

 Prostheca, 61. 

 Prothorax, 86. 



Protorerebrum, 231, 232; its representa- 

 tive in annelids, 227. 

 Proventricular valvule, 313. 

 Proventriculus, 306: "beak" of, 312; 



formation of, in imago, 682 ; use of, 



311 , 324, 325. 

 Prussic acid, ."74. 

 Psephenus, 4(52, 473. 

 Pseudoglomeris, 598. 

 Pseudonychiuni, 97. 

 Pseudo-tracheae, 446. 

 Psocus, 616. 

 Psychodes, 474. 

 Psylla, 361, 518; glandular hairs of, 192; 



nymph of, ](:!. 

 Pteronarcys, 468, 476. 

 Pterygodes, 89. 

 Pterygota, 27, 595. 

 Pulex, number of moults of, 617. 

 Pulex canis, hatching spine of, 586 ; hy- 



popharynx of, 77. 

 Pulling power, 218. 

 Pulse, 411. 



Pulvillus, 97, 114, 116. 

 Pump, pharyngeal, 302: adaptation of, to 



its surroundings, 631 ; armature of, 



631 ; structure, 632. 

 Pupa, coarctate, 621, 626; libera, 626; 



mode of escape of, from its cocoon, 



632 ; mode of suspension, 637 ; nympha- 



lid, 631; obtecta, 626; spines of, 629; 



state defined, 625. 

 Pupa, semi, (591. 

 Pupal, pseudo-, stage, 691; sustainers, 



638. 



Puparium, 621. 

 Pupation, mechanism of, 661; process 



of, 659. 

 Pupipara, post-embryonic changes in, 



686. 



Pushing power, 218. 

 Pygidium, 163. 

 Pylnric valvule, 315. 



Pyrophorus, 424. 

 Pyrrarctia, 617. 

 Pyrrhocoris, 372. 



Quiescent pupal Ijfe, 598. 



Ranatra, 523. 



Raphidia, 631. 



Raschke, on the rectal respiration of 

 jCulex, 405. 



Rath, Vom, on larval Julus, 13. 



Ratzeburg, on composition of head in 

 Hymenoptera, 55. 



Reaumur, on the creniaster, (537 ; on the 

 double sexual openings of Ephemera, 

 489; on germs of wings, 128; on the 

 heart, 403; on the mechanism of pupa- 

 tion, 661; on metamorphosis, 642; on 

 the origin of legs of imago from those 

 of the larva, 654 ; on rectal respiration, 

 463; on sense of smell, 264; on vision, 

 256. 



Rectal glands, 318 ; tracheal gills, 4(53. 



Rectum, 318 ; of embryo, 577. 



Reinhard, on head of Hymenoptera, 55; 

 on the median segment, 164. 



Reproduction, organs of, 485; origin of, 

 575. 



Repugnatorial glands, distribution of, 

 382. 



Respiration, 430, 451 ; rectal, 463. 



Respiratory system, 430; mechanism of, 

 451. 



Resting stage, 707. 



Retina, origin of, 568. 



Retinula, cells of, 250, 253. 



Rhabdites, 167, 517. 



Rhabdom, 250. 



Rhabdopoda, 176. 



Rhipiphorus paradoxus, (>!)7. 



Rhopahim, 636 ; pupal spines of, 636. 



Rib, Semper 's, 121. 



Ribs of wings, 14(5. 



Ridges, primitive, of nervous system, 

 554. 



Riley, on the cremaster, 637 ; egg-burster, 

 585 ; hatching of seventeen-year Cicada, 

 584 ; life-history of Epicauta, 692. 



Rods of eye, 253. 



Rods, visual, of eye, origin of, 568. 



Rombouts, on locomotion of insects on 

 smooth surfaces, 114. 



Ruptor ovi, 585. 



Ryder, on loss of tarsi, 101; on Scolo- 

 pendrella, 19. 



