INDEX 



715 



Cyphon, 472. 

 Cytoplasm, 525. 



Dahl, on constancy of number of six legs, 

 100; on motion of insects on smooth 

 surfaces, 100, 111, 113, 116. 



Jhimiis, 197, 381; archippus, hypophar- 

 ynx of, 75; plexi[)pus, wings of, 137. 



Dandolo, on amount of food eaten by the 

 silkworm, 608. 



Dalana, 634. 



Datana ministra, moulting of, 611 ; sec- 

 tion of larva, 131 ; setae of, 188 ; taeni- 

 clia of, 444, 448. 



Death-watch, 293. 



Deltochilum gibbosum, 101. 



De Moor, on tracks of insects, 106, 109. 



Dermal glands, 365. 



Dermaptera, wingless, 598. 



Deutocerebrum, 231, 2: 17. 



Development, direct, 598. 



Dewitz's discovery of imaginal bud- 

 stalks, 673; locomotion of insects on 

 smooth surfaces, 111; on movement 

 of leucocytes independent of the cir- 

 culation, 413; openings of glandular 

 hairs, 192; ovipositor, 168, 170, 171; 

 stigmata of odonate nymphs, 439 ; 

 open tracheal system, 460, 464; wing- 

 buds, 127, 142. 



Diapheromera, 371, 616 ; eggs of, 517, 520. 



Diaphragm, pericardial, 412. 



Didonis, 381, 391. 



Digestion, 324. 



Digestive canal of imago in the fly, ap- 

 pendages of, 297, 302, 331 ; formation of, 

 681 ; histology of, 320 ; length of, not a 

 criterion of its habits, 301; primary 

 regions, 299, 302. 



Dimmock,on hypopharynx,71 ; on labrum 

 epipharynx, 44 ; on pseudo-trachea, 446. 



Diplopoda, 12. 



Diptera, coarctate, 620 ; cyclorapha, 621 ; 

 development of imago of, 666; food 

 reservoir of, 305 ; germs of genital 

 glands, 580; hypopharynx of, 78; lar- 

 val types of, 607 : mouth-parts of, 78 ; 

 olfactory organs of, 273 ; origin of legs 

 of imago in, 654; orthoraphons, 621, 

 626; post-embryonic changes in, (iiiii: 

 salivary glands of, :>:>:!. 



Dipterous embryo, suppression of polyp- 

 ody in, 707. 



Direct development, 598. 



Discota, 072. 



Division nuclei, 530. 



Donacia, 620. 



|)orsal organ, 535. 



Doryphora, 50; embryology of, 544; 



hatching spine of, 586. 

 Dragon-fly, 53; muscles of flight of, 157; 



number of moults of, 616. 

 Draught power, 218. 

 Drosophila, 518. 

 Dryocampa, 187. 

 Dubois on the cucujo, 424, 426. 

 Ducts, ejaculatory, 496; seminal, 496. 

 Dufour, gland of, 358. 

 Dujardinia, 34. 



Dyar on the number of moults, 615. 

 Dyticus, 4(51; foot of male, 93, 99, 114; 



larva, poisonous saliva of, 359; mode 



of swimming of, 116 ; tamidia of, 445 ; 



trail curves of, 108. 



Eacles, 616. 



Ears, 288. 



Eaton, on nymph stage, 594; on rectal 

 respiration in nymphs of ephemerids, 

 4(i5. 



Ecdysis, 609, 611. 



Ectoderm, 534 ; formation of, 558. 



Eetotrachea, 432, 448, 684. 



Egg, 515 : burster, 585 ; capsule, 517, 520 ; 

 cells, 504 ; chambers, 502 ; fertilization 

 of, 525; germs, 502; guide, 183; inter- 

 nal structure of, 524; markings of, 521 ; 

 mat uration of, 525 ; mode of deposition 

 of, 518 ; number laid, 515 ; ovarian, 

 501: ripe, 520; sacs, 3(51, 517, 520; 

 shell, 520: smaller in holometabolous 

 insects, 515 : tubes, 501 ; vitality of, 

 520. 



Ejaculatory ducts, double openings of, 

 48(5 ; origin of, 578. 



Elater of Collembola, 551. 



Electricity, influence of, on action of 

 heart, 412. 



Eleodes, 372. 



Elliott on color sense, 261. 



Elrnis, 4(52, 473. 



Elytra, 124; glands in, 125. 



Embidse, 620. 



Embryo, 531 ; revolution of, 540. 



Embryology of insects, 515. 



Embryonic life, length of, 582. 



Embryonic membranes, involution of, 

 55(5. 



