764 
Mayer on development of trachea, 354 
on merdistic ova, 709 
Mechanism of flight. See Flight 
Mechanism of Fly’s foot, 197 
Median eyes, position of, 121 
Median fissure of cerebron, 453 
Median ganglia of larva, 93 
Median segment, 188 
Median tooth of larva, 41 
Medulla of nerve ganglia, 66 
Meigen on abdominal ganglion, 436 
Melée, metamorphosis of, 18, 
ovary of, 668 
Melolontha, dorsal organ of, 255 
dorsal vessel of, 650 
flight of, 385 
muscles of, 219 
post-scutellum of, 186 
respiration in, 374 
wing sclerites of. 201 
Membrana basilaris of dioptron, 532 
development of, 552 
Membrana fenestrata. See 
brana basilaris 
Membrana tympani. See Tympana, 
and Tympanic membrane 
Membrane of Krause, 287 
Membranes of egg, 12 
embryonic, of Insects, 241 
Mentum, 143 
Menzbier on development of pro- 
boscis, 322 
on fulcrum, 138 
on head discs, 322 
on head skeleton of larva, 40 
Meroblastic ova, 708 
Merdistic ova, 701, 709 
Mesencephalon, 444. See Cerebron 
Mesenchyme, 235, 333. See Para- 
blast 
Mesenteron, 13 
general morphology of the, 53 
of embryo, 249 
redevelopment of the, 331, 426, 
427 
See also Alimentary canal 
Mesoblast, 13 
of discs of larva, 77 
origin of, in embryo, 251 
See also Mesoderm 
Mesocerebron, 445, 453 
lobes of, 453 
of Astacus, 445 
See Cerebron 
Mem- 
INDEX. 
Mesoderm, 333, 335 
Mesofrontal sclerite, 115 
Mesogenital somite, 728, 743 
Mesolabrum, 115 
Mesophragma, 171, 185 
Mesopleural syndesmosis, 167, 187 
Mesopterygium, 163 
Mesosternum, 171 
of Bombus, 168 
Mesothoracic muscles, 22 
Mesothorax, 154 
Metabola, metamorphosis in, 23 
Metacephalic ring, 122 
Metacerebron, 444 
of Astacus, 447 
Metacranial annuli, 118 
Metafurca, 174 
‘Metagenital somite, 728, 743 
Metalabrum, 115 
Metamere, 8 
Metamorphosis, 18, 23 
Metapleuron, 170, 174, 186 
Metapneustic larvae, 28 
Metapterygium, 163, 203 
Metasternum, 174 
Metathorax, 155, 186 
Metencephalon, 444 
Metenteron, 17, 53, 249, 331, 411 
Methods of study, 93, 347 
Metschnikoff, or Metschnikow, on 
causes of immunity from his- 
tolysis, 310 
on development of Simulia, 254 
on germinal vesicle, 713 
on gonads in Cecidomyia larva, 
689 
on intracellular digestion, 297 
on yelk segmentation in Scor- 
pions, 239 
Meyer. Sce Mayer 
Micropyle, 681 
Micropyle canal, 682 
Mid-gut. See Mesenteron 
Milne Edwards on germinal vesicle, 
711 
Mirror, 185, 626 
of Cicada, 601, 625 
of Locusta, 601 
Mononematische Stifte, 597 
Monostichous ocelli, 512 
Morula, formation of, 239 
Moseley on salivary glands, 54 
on trachez, 356 
Mother cells, 276 
