INDEX. 



769 



Post-scutellar region, 183, 185 

 Post-scutellum, 169, 170, 183 

 Poulton on development of male 

 organ, 732 



on number of abdominal seg- 

 ments, 729 



Power on foot of Fly, 195 

 Prefacial region, 115 

 Prelabrum, 115, 148, 150 

 Preoral ganglia, 63 

 Preoral somites, 15 

 Preparation of embryo, 347 

 Preretinal membrane, 512, 513 

 Prescutum, 166 

 Prestomal sclerite of larva, 43 

 Prestomum, 144 

 Presutural ridge, 176 

 Primitive band, 13, 243, 245 



contraction of, 246 



relation of, to membranes, 241 

 to nervous system, 479 



structure of, 246 

 Primitive fibrillse of muscle, 285 

 Primitive groove, 246 

 Primitive trace, 253 

 Primordial sexual cells, 693 

 Proboscis, 127, 390 



air channels of, 398 



air-sacs of, 396 



azygos air-sac of, 398 



bibliography of, 127 



comparative anatomy of, 149 



development of, 130, 148 

 in nymph, 321 



exoskeleton of, 127 



exsertion of, 377 



immature condition of, 148 



mechanism of, 390, 395 



morphology of, 130, 147 



movements of, 139 



muscles of, 391 



nerve end-organs of, 402 



oral lobes of, 393 



soft parts of, 390 



suckers of, 401 

 Procephalic lobes, 14, 63, 114 



changes of, in embryo, 259 

 Procerebral lobe, 455 



development of, 494 

 Proctodeum, 248 



cuticle of, 282 



of imago, 412 

 Prodorsal arch, 177 

 Progenital somite, 728 



Progenital sternum, 728, 739 

 Progenital tergum, 737 

 Pro-imago, 340 

 Pronymph, 296 



contractions of, 303 



infra-cesophageal ganglia of, 313 

 Prophragma, 177 

 Propterygium, 163 

 Prosternal area, 178 

 Prosternum, 173, 189 



sensory organs of, 179, 217, 633 

 Protandry, 723, 724 

 Prothoracic apodeme, 177 

 Prothoracic horns. -See Stigmatic 



cornua 



Prothoracic region, 179 

 Prothorax, dorsal arch of, 166 

 Protocerebron, 442 

 Protoplasm, 264 

 Proventricular ganglion of imago, 409 



of larva, 57 



Proventricular ring, 57, 314 

 Proventriculus, 52, 408 



cell fibrillation in, 280 



development of, in embryo, 422 



function of, 409 



general morphology of, 52 



of imago, 408 



of larva, 56 

 Proximal intestine, 410 



of larva, 58 



origin in nymph, 429 

 Pseudo-cone, 516, 528 



origin of, 551 

 Pseudo-conic eye, 519 

 Pseudo-haemal vessels, 358 

 Pseudo-labium, 141 

 Pseudo-pupils, 577, 579 

 Pseudo-trachea?, 146 



structure of, 393 

 Pseudo-yelk, 298 



formation of, 4 



use of, 4 



Pterophorus, eye of, 524 

 Ptychoblast, 241, 243, 



dorsal, 255 

 Pulex, mouth organs of, 151 



movements of trachea? in, 383 



pygidium of, 629 

 Pulvillus, 195 

 Pupa, 20 



coarctata, 20 



loss of weight in, 309 



obtecta, 20 



