IXDEX 



725 



Procephalie lobes, 544. 



Proetuda-iun, 537, 547, 569. 



Prodoxus, G0<>. 



Progoneate myriopods, 21. 



Proiiotum, 87. 



Prouucleus, 526. 



Propndeiim, 163. 



Propupa. <I-7. 



Prosopistoma, 467. 



Prostheca, 61. 



Prothorax, 86. 



Protooefrebrum, 231, 232; its representa- 

 tive in annelids, 227. 



Proventriciilar valvule, 313. 



Proventriculus, 30(5; "beak" of, 312; 

 formation of, in imago, 682 ; use of, 

 311, 324, 325. 



Prussic acid. 374. 



Psephenus, 462, 473. 



Pseudoglomeris, 598. 



Pseudouychiuin, 97. 



Pseudo-trachea;, 446. 



Psocus, 616. 



Psycliodes, 474. 



Psylla, 301, 518; glandular hairs of, 192; 

 nymph of, 163. 



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, G31 ; armature of, 



631 ; structure, 632. 



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

 UK le of escape of, from its cocoon, 



632 ; mode of suspension, 637 ; nympha- 

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

 state defined, 625. 



Pupa, semi, 691. 



Pupal, pseudo-, stage, 691; sustainers, 



638. 



Puparium, 621. 

 Pupation, mechanism of, 661; process 



of, 659. 

 Pupipara, post-embryonic changes in, 



686. 



Pushing power, 218. 

 Py-idium. 163. 

 Pyloric valvule, 315. 



Pyrophorus, 424. 

 Pyrrarctia, 617. 

 Pyrrhocoris, 372. 



Quiescent pupal life, 598. 



Ranatra, 52:'.. 



Raphidia, 631. 



Raschke, on the rectal respiration of 

 Culex, 465. 



Rath, Vom, on larval Julus, 13. 



Ratzeburg, on composition of head in 

 Hymenoptera, 55. 



Reaumur, on the cremaster, 637; 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, 463. 



Rectum, 318; of embryo, 577. 



Reiuhard, 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. 



Rhahdom, 250. 



Rhabdopoda, 176. 



Rhipiphorus paradoxus, 697. 



Rhopalum, (>Mii : pupal spines of, 636. 



Rib, Semper's, 121. 



Ribs of wings, 140. 



Ridges, primitive, of nervous system, 

 554. 



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

 5S5 : hatching of seventeen-year Cicada, 

 5S4 ; life-history of Epicauta, 692. 



Rods of eye, 253. 



Rods, visual, of eye, origin of, 508. 



Rombouts, on locomotion of insects on 

 smooth surfaces, 114. 



Ruptor ovi, 5sr>. 



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

 peudrella, 19. 



