718 



INDEX 



Hatching, process of, 583; spine, 585. 



Hauser, on organs of smell, 267, '260, 279. 



Head, 42: blood-vessels in, 403; comple- 

 tion of head of embryo, 548: formation 

 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, 307 : beat, 411 ; free from histol- 

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

 cardial diaphragm, 402; propulsatory 

 apparatus, 401 ; supraspinal vessel. 403. 



Heathcote, on double segments of Diplo- 

 pods, 14. 



Heider, on embryology of Hydropbilus, 

 530. 



Heinemann, on the firefly, 426. 



Helcodermatons spines, 612. 



Helecomitus, 616. 



Helichus, 474. 



Heliconidse, 370. 



Helm, on spinning-glands, 330. 



Hemelytra, 124. * 



Hemerobidai, hatching spine of, 585. 



Hemimetabola, 50S. 



Hemiptera, cardo of, 69; foetid glands of, 

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

 vary glands of, 333 ; stipes of, 69. 



Hepialus, 302, 405. 



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, 403 ; premandibular segment. 

 52 : on the primitive segments of Phyl- 

 lodromia, 563; on reproductive glands. 

 575; tentori um, ."in. 



Hicks, on auditory organs, 293; <m olfac- 

 tory organs. 266. 



llistogewsis, 650. 



Histolysis, 643, 650, 67s. iISO. 6S5. ess. 



HolTltauer, on the structure of elytra. 

 125. 



Holmgren, on tracheal end-cells, 437. 



Holometabola, 50s. 



Holometabolous insects, 595. 



Holopneustic type of tracheal syst em, 450. 



Holoptic head, 08. 



Honialotylus, 623. 



Homoptera, number of moults of, 616. 



Homotenous insects, 597. 



Honey-dew, 364; deterrent use of, :wi. r >; 

 sac, 309; stomach, 30V). 



Hopkins, on pigments, 207. 



Hornia, hypermetamorphosis of, 603. 



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. 



Hydropsyche, 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, 102. 



Hypermetamorphosis, described, tiss ; 

 causes of, 603. 



Hypodactyle, 73. 



Hypoderma. 518. 



MypiMlermis, 188, 612; origin of an 

 imago, 678. 



Hypopharynx, 13, 54, 68, 70. 



Hypoptere, SO. 



Icerya, 616, 626. 



Ichneumon. 622 : hypermetamorphosis 

 of, 701 : poison glands of. 350. 



Ileuni, 317. 



Imaginal buds. 653: disks, 653. 



Imago, format ion of. in Chironomus. 671 ; 

 Corethra. 66S : Culex. 6iiS; IIymenoi>- 

 tera. 661: I.epidoptera. 641: Melo- 

 phagns. (ISO ; Musca, 67.". : of tly. 

 development of internal organs of. 

 67S: Simulium, 668. 



