INDEX. 



755 



Cuvier on absence of circulation in 



Insects, 636 

 Cycloraphic Diptera, 29 



lunula of, 125 

 Cynomyia mortuorum, 31 

 Cytogenic cells, 274 



tissue, 274 



DEGLUTITION in imago, 402 



Delamination of nervous layers, 484 



Deltoid sclerite, 203 



Dens, 199 



Dereham on fly's foot, 196 



on halteres, 616 

 Dermato-genetic cells, 480 

 Desvoidy. See Robineau - Des- 



voidy 



Deuterocerebron, 442 

 Deuteroplasm, 708 

 Development, effect of temperature 



on, 4 

 of embryo in egg, 230 



bibliography of, 230, 292 

 of nymph, 292 

 See also under each organ. 

 Dewitz on closed trachea;, 358, 380 

 on development of external 



generative organs, 731, 733 

 on development of limbs in 



vermiform larvae, 21 

 on passage of gases through in- 

 tegument, 379 

 on relation of spiracles to gills, 



371 



Diaphragmata, 106 

 Diarthrosis, posterior thoracic, 171, 



183 

 Dietl on antennal ganglion, 590 



on Marksubstanz, 66 

 Dilator pharyngis muscle, 390 

 Dimmock on proboscis, 398 

 Dioptric theory of vision, 560 



illumination of the retina in, 575 

 Dioptron, 515 



of Blow-fly, 526 



pigment cells of, 530 



structure of, 526 



trachea? of, 530 



See also Compound eye 

 Diplostichous ocelli, 512 

 Diptera chaHophora, 1 1 



development of, in egg, 230 



eremocha^ta, 1 1 



Diptera, ganglia in, 64 



general characters of, 25 



larva; of, 27 



metamorphosis of, 20 



nematocera, 30 



relations of, to other insects, 26 



sub-orders of, 29 



wings of, 164 



Direct nuclear division, 270, 271 

 Directive corpuscles, 714 

 Disc. See Imaginal disc 

 Disc holder, 212 

 Discal area, 198 

 Discal sclerites, 143 

 Discophore, 148 

 Dissecting microscope, 212 

 Dissection, directions for, 211 

 Distal intestines of larva, 58 

 Distal retina of Parker, 531 

 Dogiel, nerves of, 478 

 Dohrn on development of nervous 

 system, 481 



on development of Malpighian 

 tubules, 423 



on metenteron of Hymenoptera, 



4^3 



on relations of Insects to Verte- 

 brates, 109 

 Dolichopus, anterior legs of, 191 



genital armature of, 739 

 Dolium, 183, 187 

 Dominant sensations, 497 

 Donacia, amoeboid movements of 



yelk in, 715 



Dorsal aspect of the thorax, 166 

 Dorsal muscles, 187, 223 



action during respiration, 377 



development of, 336 



functions of, 187, 377 



histology of, 283 

 Dorsal organ, 17, 254, 255 

 Dorsal plate. See Dorsal organ 

 Dorsal valve of thorax, 175 

 Dorsal vessel, bibliography of, 635, 



656 



development of, 656 

 Dorsal vessel of imago, 639 



alar muscles of, 637, 647 

 Dorsal vessel, demonstration of, in 

 action, 655 



dissection of, 639 



histology of, 644 



inhibition of, 655 



physiology of, 650 



