INDEX. 



761 



Imaginal discs, cephalothoracic, 77 



development of, 74, 305 



evolution of, 305 



history of discovery of, 73 



inferior thoracic, 83 



labial, 83 



leg, 83 ' 



maxillary, 83 



mesoblast of, 77, 334 



morphology of, 72, 73, 304 



number of, 4 



origin of, 74 



relations of, in nymph, 315 



relation to paraderm, 303 



structure of, 334 



thoracic, in larva, 83 



upper thoracic, 319 

 Imaginal rudiments. See Histoblast 

 Imago, 4 



development of, from nymph, 



344 



escape from pupa, 4 



immature, 4, 216 

 Imbedding, methods of, 95 

 Immature head capsule, 124 

 Immunity of imaginal tissues in pupa, 



310 



Indirect cell division, 269 

 Infra-cesophageal ganglia, 465 



functions of, 475 



of pronymph, 313 



Insects, anatomy of, bibliography 

 to, 7 



relation of, to Vertebrates, 109 

 Instincts of female Blow-rly, 5 

 Integument, abdominal, 328 



development of, 280, 318, 344 



of head and thorax, 318 



of larva, 35 

 Intercalated cells, 276 

 Intercellular matrix, 264 

 Intermediate substance of muscle- 

 fibres, 285 



Internal generaiive organs, descrip- 

 tive anatomy of, in female, 666 



in male, 660 



bibliography of, 684 



development of, 684 

 Internal anal valves, 744 

 Internal light of retina, 577 

 Internal ridges of thorax, 185 

 Internal skeleton of head, 119 

 Internal tubercle, 461 

 Intersegmental muscles, 219 



Intersegmental spiracles, 181, 319. 



359 



Intestinal coil, in embryo, 426 

 in nymph, 430 



Intestinal ganglia of larva, 59 



Intracellular digestion, 297 



Intratracheal pressure, 377 



Intratracheal valves, 366 



Invagination of head discs in em- 

 bryo, 259 



Iris, 531 



Iris cells, 529 



Isotropous substance, 285 



Jackson, H., on head segments, 108 

 on development of oviducts, 704 

 on parovaria, 674 



Jaworowski on dorsal vessel, 285, 

 656 



Joints, 101 



Jousset de Bellesme on halter, 615, 

 616 



Jugum, 119, 122, 123 



Julus, Heathcote or, 157 



Jurine on flight, 206 



Karop on mounting objects in glyce- 

 rine, 214 

 Karyokinesis, 269, 270 



in muscle, 287 



in spermatogenesis, 696 

 Karyomitosis. See Karyokinesis 

 Karyoplasm. See Nucleoplasm 

 Keimfach, 709 



Keimstreif, 245. See Primitive band 

 Kennel on yelk segmentation, 237 

 Kistoid corner, 526 

 Kolliker on eye of Astacus, 506 



on classification of eyes, 505 

 Kornchenkugeln, 273, 297. See 



Granule cells 

 Korotneff on development of Gryllo- 



talpa, 233 

 Korschelt on chorion, 680 



on vitelline membrane, 683 



on nutrient cells of egg, 702 

 Kowalevski, dorsal organ of, 17, 254 



on cell chaplets, 343 



on development of brain in 

 Sagitta, 487 



on development of nervous sys- 

 tem in Hydrophilus, 479 



