INDEX 



715 



Cypbou, 472. 

 Cytoplasm, 525. 



Dahl, on constancy of number of six legs, 

 Kid; on motion of insects on smooth 

 surfaces, 100. Ill, 113, 116. 



Dauais, 197, 381 ; archippus, hypophar- 

 ynx of, 75 ; plexippus, wings of, 137. 



Dandolo, on amount of food eateii by the 

 silkworm, 608. 



Datana, 634. 



Datana ministra, moulting of, 611 ; sec- 

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

 dia of, 444, 448. 



Death-watch, 2!)3. 



Deltochilum gibbosum, 101. 



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



Dermal glamls, 365. 



Dermaptera, wingless, 598. 



Deutocerebrum, 231, 237. 



Development, direct, 598. 



Dewitz's discovery of imaginal bud- 

 stalks, 073; 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. 



DimmockjOD 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; orthoraphous, 621, 

 626; post-embryonic changes in, 666; 

 salivary glands of, :!.">:;. 



Dipterous embryo, suppression of polyp- 

 oily in. 7<iT. 



Direct development, 598. 



Discota, 672. 



Division nuclei, 530. 



Donacia, 620. 



Dorsal 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. 

 l>u bois on the cucujo, 424, 426. 

 Ducts, ejaculatory, 496; seminal, 496. 

 Dufour, gland of, o58. 

 Dujardinia, 34. 



Dyar on the number of moults, 615. 

 Dyticus, 461; foot of male, 93, 99, 114; 



larva, poisonous saliva of, 359; mode 



of swimming of, 116; tasnidia of, 445; 



trail curves of, 108. 



Eacles, 616. 



Ears, 288. 



Eaton, on nymph stage, 594; oil rectal 

 respiration iu nymphs of ephenierids, 

 465. 



Ecclysis, 609, 611. 



Ectoderm, 534; formation of, 558. 



Ectotrachea, 432, 4-18, 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 ; 

 maturation of, 525 ; mode of deposition 

 of, 518; number laid, 515; ovarian, 

 501; ripe, 520; sacs, 361, 517, 520; 

 shell, 520; smaller in holometabolous 

 insects, 515 ; tubes, 501 ; vitality of, 

 520. 



Ejaculatory ducts, double openings of, 

 486 ; origin of, 578. 



Elater of Collembola, 551. 



Electricity, influence of, on action of 

 heart, 412. 



Eleodes, 372. 



Elliott on color sense, 261. 



Elmis, 462, 47:'.. 



Elytra, 124 ; glands in, 125. 



Embidre, 620. 



Embryo, 531 ; revolution of, 540. 



Embryology of insects, 515. 



Embryonic life, length of, 582.- 



Embryonic membranes, involution of, 

 556. 



