718 



INDEX 



Hatchiug, process of, 583; spine, 585. 

 Hanser, on organs of smell, 267, 269, '279. 

 Head, 42; blood-vessels in. 4<r>; comple- 

 tion of head of embryo, 54>: funnation 

 of, in aculeate Hymenoptera, 57 : lobes, 

 544: number of segments in, 50, 54; of 

 Musca. post-embryonic development 

 of, 675; post-embryonic development 

 of appendages of, 653. 



Hearing, organs of, '287. 



Heart, 397 ; beat, 411 : free from histol- 

 ysis, 667; origin of, 572, 577; peri- 

 cardial diaphragm, 402; propulsatory 

 apparatus, 401 ; supraspinal vessel, 403. 



Heatbcote, ou double segments of Diplo- 

 pods, 14. 



Heider, ou embryology of Hydropbilus, 

 530. 



Heinemann, on the firefly, 426. 



Helcodermatous spines, 612. 



Helecomitus, 616. 



Helichus, 474. 



Heliconidse, 379. 



Helm, on spinning-glands, 339. 



Hemelytra, 124. 



Hemerobidaj, hatching spine of, 585. 



Hemimetabola, 598. 



Hemiptera, cardo of, 69; foetid glands of, 

 372; lacinia of, 74; palps of, 68; sali- 

 vary glands of, 333; stipes of, 69. 



Hepialus, 392, 495. 



Heptagenia, 467; lingua of, 73. 



Heredity, bearer of, 498 ; homochronous, 

 708. 



Heremetabola, 597. 



Herold, on the metamorphosis of the 

 butterfly, 642 ; on wing-germs, 128. 



Heterochrony, 542. 



Heterometabola, 597. 



Heymons, on homologies of the labrum, 

 43; on nature of elytra, 126; on origin 

 of fat-body, 575; on paired sexual 

 openings, 493 ; premandibnlar segment, 

 52; on the primitive segments of Phyl- 

 lodromia, 563; on reproductive glands, 

 575; tentorium, 50. 



Hicks, on auditory organs, 293; on olfac- 

 tory organs, 266. 



Histogenesis, 650. 



Hist. .lysis, 643, 650, 678, 680, 685, 688. 



Hot'fbauer, on the structure of elytra, 

 125. 



Holmgren, on tracheal end-cells, 437. 



Holometabola, 598. 



Holometabolous insects, 595. 



Holopneustic type of tracheal system, 459. 



Holoptic head, 98. 



Homalotylus, 623. 



Homoptera, number of moults of, 616. 



Homotenous insects, 597. 



Honey-dew, 364; deterrent use of, 365; 



sac, 309; stomach, 309. 

 Hopkins, on pigments, 207. 

 Hornia, hypermetamorphosis of, 693. 

 Horns, 187. 

 Horn, on loss of tarsi, 101 ; on Platy- 



psylla, 62. 



House-fly, thorax of, 88. 

 Hum of bee, 295. 



Hunter, John, on the air-sacs, 456. 

 Hurst, on the formation of the imago in 



Culex, 670. 

 Hybocampa, 635. 

 Hyd robins, 471. 

 Hydrophilus, 374, 432; embryology of, 



536, 537, 542, 546, 558, 575. 

 Hyclropsyche, blood-gills of, 475 ; gills of, 



at all stages, 469. 

 Hydrous, 49, 50. 

 Hylotoma, 52. 



Hymenoptera, composition of the head 

 in, 55; mouth-parts of, 79, 81; olfac- 

 tory organs of, 277 ; open stigmata of, 

 462; poison glands of, 357; post-em- 

 bryonic changes in, 661; salivary 

 glands of, 334. 

 Hyperchiria io, 187, 378 ; poisonous spines 



of, 192. 

 Hypermetamorphosis, described, 688 ; 



causes of, 693. 

 Ilypodactyle, 73. 

 Hypoderma, 518. 

 Hypodermis, 188, 612 ; origin of an 



imago, 678. 



Hypopharynx, 13, 54, 68, 70. 

 Hypoptere, 89. 



Icerya, 616, 626. 



Ichneumon, 622 ; hypermetamorphosis 

 of, 701 ; poison glands of, 359. 



Ileum, 317. 



Imaginal buds, 653; disks, 653. 



Imago, formation of, in Chironomiis. 671 ; 

 Corethra, 668; Culex, 668; Hymenop- 

 tera, 661; Lepidoptera, 641; Melo- 

 phagus, 68(5 ; Musca, (573 ; of fly, 

 development of internal organs of. 

 678; Simulium, 668. 



