I NDEX 



ABDOMEN, 12 



imaginal discs of, 329 

 respiratory movements of, 376 

 tracheae of, 226 



Abdominal cavity, contents of, 217 

 Abdominal fold in pronymph, 303, 



3i3 

 Abdominal integument, development 



of, in nymph, 328 



Abdominal segments, development 

 of, 729 



nomenclature of, 724, 727 



number of, in embryo, 15, 729 



number of, in larva, 33, 730 

 Abdominal spiracles, 363, 364 

 Abdominal terga in male, 738 

 Absorbent cells, 279 

 Acalypterata, 30 



Accessory nucleus. Sec Paranucleus 

 Accommodation of compound eye, 



532, 566 



Acephalous larvre, 27 

 Acheta, antennas of, 594 



anterior tubercle of, 464 



cerebron of, 454 



corpora fungiformia of, 462 



corpus centrale of, 459 



nerve to ocelli of, 467 

 Achromatin, 266 

 Acilius, spiracles of. 157 

 Aconic eyes, 519 

 Acrididae, Muller's organ in, 600 

 Active nucleus. See Nucleus 

 Aculeus of Hymenoptera, 729 

 Adenoid cells in larva, 85 

 Adenoid reticulum, 274 

 Aerial insects, 1 1 



air-sacs in, 224 

 Aerostats, 217 



^Eschna, development of male organ 



movements of wing in, 164 

 Air-channels of proboscis in pupa, 



398 



Air expired during flight, 383 

 Air-sacs, 224 



appearance of, 365 



azygps, 398 



modifications of, 365 



of proboscis, 396 



sternal, 226 



structure of, 365 



thoracic, 217 



Airy on sound-waves, 619 

 Alar apophysis, great, 175 



of scutellum, 176 

 Alar muscles, 637, 647 

 Alar syndesmosis, 167 

 Alary nerves, 64 

 Alimentary canal, 227, 389, 407 



bibliography of, 389 



changes of, in nymph, 311, 331 



comparative morphology of, 51 



development of, in embryo, 421 



development of, in nymph, 331, 

 ^426 



histolysis of, 311, 312 



of imago, 227, 389, 407 



of imago and larva compared, 227 



of larva, 55 



of resting larva, 3 



relations of, in imago, 227 

 Ametabola, metamorphosis of, 19 



number of eggs in, 19 

 Amnion, 241 



developed from epiblast, 16 



relations to primitive band, 241 

 Amoeboid cells, 265 



