75 6 



Dorsal vessel, rate of pulsation in, 

 654, 655 



relations of, 639 



relations of, to pericardial sep- 

 tum, 643 



valves of, 638, 64 1 



valve?, action of, 652 

 Dorsal vessel o! larva, 87 



structure of, 91 



ventricle of, 87 

 Dorsal vessel of nymph, 340 



changes during development, 



341 



morphology of, 92 

 Dorso-pleural costa, 175 

 Dorso-pleural diarthrosis, 176 

 Dorso-pleural suture, 167 

 Dragon-fly. See Libellula 

 Dufour, aerostats of, 217 



on inter-segmental spiracles, 



359 

 Dujardin on corpora fungi formia, 



461 



Duponchel on hygroscopic function 



of antenna , 594 

 Duration of larval stage, 2 



of pupa stage, 3 

 Dytiscus, experiments on nervous 



system of, 476 



KAKWK;. AVr Forficula 

 Eau de Javelle, 349 



de Labarraque, 349 

 Ecdysis, 17 



of larva, 2 



relation to metamorphosis, 23 



of tracheal intima, 307, 339, 356 

 Kchinodermata, development of em- 

 bryo in, 230, 231 



metamorphosis of, 24 

 Eciton, eyes of, 516 

 Egg, development in, 230 



development of, 701 



bibliography of, 678 

 deposition of, 5 



fecundation of, i 



form of, 678 



of Ilirds and Insects compared, 



I 2 



position of embrjo in, 678 



si/.- of, 678 

 Kgg-cel!, 701 

 Egg-stocks, 



Egg-tubes, 667 



Ehrlich's Ihi-matoxylin solution, 96 



Kingesprengte zellen, 274 



Ejaculatory duct, 665 



Ejaculatory sac, 665 



Ellipsoidal body, 458 



Embryo, 13, 230 



Icpidopterous, 241 



number of segments in, 15 



nymphoid stage of, 257 



position of, in egg, 678 



preparation of, 347 



retrograde development of, 2 

 Embryology, 12, 230 



bibliography, 230, 235 

 Embryonic cells in salivary gland, 60 

 Embryonic epithelium, 278 

 Embryonic membranes, 241 

 Embryonic rudiments, nomenclature 



of, 22 



Emery on proventriculus, 409 

 Empis, anterior legs of, 191 

 Enchylema, 264 

 End-organs, motor, 28') 



of proboscis, 402 

 End-plates. See End-organs 

 Endogenous cell division, 693, 696, 



719 



Kndolecithal, 245 

 Endopophysis, 106 

 Endosclerites, 105 

 Endoskeleton, 9 



Endosternum. A"<v Kntosternum 

 Endostractim, 9, 10, ;,<> 

 Endothelioid cells. 85 

 Endothelium, 273 

 Entocephalon, 123 



of Syrphus, i 24 



of Yolucell.i, 124 



Entoconcha, germinal vesicle of, 711 

 Kntopleuron, great. 1/2 

 Knto*.tcrnum, 106 



development of, in llydrophilus, 



481 



Entotlmrux, 172 

 Kosin, use of, 348 

 Epaulet, 200 

 Ephemera, genital ducts of, 735 



tracheal gills of, 180 

 tracheal system of, 355 

 Epiblast, 13 



delamination of the, 484 

 Kpicoiuiyle, i~<> 

 , i 



