﻿VI 
  TABLE 
  OF 
  CONTENTS. 
  

  

  Page. 
  

  

  The 
  embryologicai. 
  development 
  op 
  orthopterous 
  insects 
  271 
  

  

  Rapid 
  development 
  of 
  the 
  embryo 
  in 
  autumn, 
  272 
  — 
  embryology 
  of 
  Gryllo- 
  

   talpa 
  vulgaris, 
  272 
  — 
  formation 
  and 
  contraction 
  of 
  the 
  embryonal 
  skins, 
  

   272 
  — 
  formation 
  of 
  the 
  digestive 
  canal, 
  272 
  — 
  functions 
  of 
  the 
  mid-gut 
  

   and 
  hind-gut, 
  273 
  — 
  origin 
  of 
  the 
  Malpighian 
  vessels, 
  salivary 
  glands, 
  

   tracheae, 
  and 
  ovaries, 
  273 
  — 
  the 
  sections 
  of 
  eggs 
  studied 
  by 
  the 
  authtor, 
  

   prepared 
  by 
  N. 
  N. 
  Mason, 
  273. 
  

  

  Development 
  of 
  Caloptenus 
  atlanis 
  273 
  

  

  Rapidity 
  of 
  development 
  in 
  locust 
  eggs 
  iaid 
  in 
  autumn, 
  273 
  — 
  requisites 
  for 
  

   the 
  observation 
  of 
  stages 
  earlier 
  than 
  those 
  studied, 
  273 
  — 
  method 
  of 
  

   preparation 
  of 
  the 
  eggs 
  studied, 
  274 
  — 
  structure 
  of 
  the 
  nervous 
  system 
  and 
  

   eyes, 
  274 
  — 
  of 
  the 
  heart, 
  274 
  — 
  mode 
  of 
  origin 
  of 
  the 
  heart, 
  274 
  — 
  contents 
  

   of 
  the 
  heart, 
  274 
  — 
  structure 
  of 
  the 
  tracheae, 
  275 
  — 
  of 
  the 
  digestive 
  canal, 
  

   275 
  — 
  relations 
  of 
  the 
  proctodaeum 
  to 
  the 
  amnion, 
  275 
  — 
  structure 
  of 
  the 
  

   Malpighian 
  tubes, 
  276 
  — 
  the 
  yolk 
  cells 
  and 
  yolk 
  granules, 
  276. 
  

  

  Development 
  of 
  Caloptenus 
  spretus 
  277 
  

  

  The 
  primitive 
  segments, 
  277 
  — 
  ^the 
  nervous 
  system, 
  277 
  — 
  ^the 
  trachea?, 
  278 
  — 
  

   the 
  digestive 
  canal, 
  278 
  — 
  details 
  of 
  structure 
  in 
  more 
  advanced 
  embryos, 
  

   278— 
  structure 
  of 
  eyes, 
  278 
  — 
  origin 
  of 
  ocelli, 
  278 
  — 
  relations 
  of 
  antennae, 
  

   eyes, 
  clypeus, 
  and 
  labrum 
  to 
  the 
  procephalic 
  lobes, 
  279 
  — 
  structure 
  of 
  

   brain 
  and 
  other 
  ganglia, 
  279 
  — 
  relations 
  of 
  mandibles 
  and 
  the 
  two 
  pairs 
  

   of 
  maxillae, 
  279 
  — 
  relative 
  development 
  of 
  legs, 
  279— 
  sections 
  of 
  embryo 
  

   about 
  ready 
  to 
  hatch, 
  279. 
  

  

  The 
  development 
  of 
  the 
  bark-boring 
  beetles 
  Hylurgops 
  and 
  Xyle- 
  

  

  BORUS 
  280 
  

  

  Breeding 
  habits 
  of 
  Xyleborus 
  ccelatus, 
  280 
  — 
  oviposition 
  of 
  Hylurgus 
  pinifex, 
  

   280 
  — 
  egg 
  of 
  the 
  Xyleborus 
  'iiA 
  hours 
  after 
  impregnation, 
  280 
  — 
  more 
  de- 
  

   veloped 
  egg, 
  280 
  — 
  threads 
  connecting 
  the 
  amnion 
  with 
  the 
  serous 
  mem- 
  

   brane, 
  281 
  — 
  dorsal 
  view 
  of 
  the 
  embryo, 
  281 
  — 
  later 
  stage 
  in 
  Hylurgops, 
  281 
  — 
  

   * 
  later 
  stage 
  in 
  Xyleborus, 
  281 
  — 
  number 
  of 
  pairs 
  of 
  spiracles, 
  281 
  — 
  structure 
  

   and 
  habits 
  of 
  freshly 
  hatched 
  Hylurgops, 
  281. 
  

  

  The 
  number 
  of 
  segments 
  in 
  the 
  head 
  of 
  winged 
  insects 
  282 
  

  

  Views 
  generally 
  entertained 
  on 
  this 
  subject, 
  282 
  — 
  head 
  composed 
  of 
  four 
  

   segments, 
  283 
  — 
  the 
  procephalic 
  lobes 
  form 
  the 
  antennal 
  segment, 
  284 
  — 
  

   the 
  clypeus 
  and 
  labrum 
  are 
  the 
  tergal 
  portion 
  of 
  this 
  segment, 
  284 
  — 
  the 
  

   epicranium 
  is 
  the 
  pleural 
  portion, 
  284 
  — 
  the 
  occiput 
  is 
  the 
  tergal 
  portion 
  

   of 
  the 
  labial 
  segment, 
  284 
  — 
  the 
  gular 
  region 
  probably 
  the 
  base 
  of 
  the 
  

   labium, 
  285. 
  

  

  CHAPTER 
  XI. 
  

  

  The 
  systematic 
  position 
  of 
  the 
  orthoptera 
  in 
  relation 
  to 
  other 
  or- 
  

   ders 
  OF 
  insects 
  286 
  

  

  Review 
  of 
  the 
  characteristics 
  of 
  the 
  four 
  lowest 
  orders 
  of 
  winged 
  insects, 
  

   286 
  — 
  probable 
  descent 
  of 
  Orthoptera, 
  Pseudoneuroptera, 
  and 
  Dermato- 
  

   ptera 
  from 
  a 
  Thysanuran 
  form, 
  286 
  — 
  method 
  of 
  the 
  present 
  study, 
  286— 
  

   characters 
  of 
  the 
  Phyloptera, 
  287 
  — 
  mouth-parts, 
  287— 
  thorax, 
  287 
  — 
  wings, 
  

   288— 
  abdomen, 
  288 
  — 
  metamorphosis, 
  288 
  — 
  nomenclature 
  of 
  external 
  parts 
  

   of 
  arthropoda, 
  288 
  — 
  sequence 
  of 
  orders 
  of 
  Phyloptera, 
  288-^characters 
  of 
  

   Dermatoptera, 
  289 
  — 
  of 
  Orthoptera, 
  289 
  — 
  of 
  Pseudoneuroptera, 
  290 
  — 
  want 
  

   of 
  uniformity 
  in 
  characters 
  of 
  Pseudoneuroptera, 
  290 
  — 
  the 
  diagnostic 
  

   characters 
  superficial, 
  290 
  — 
  structure 
  of 
  labium, 
  291 
  — 
  relative 
  proportions 
  

   of 
  head-parts, 
  291 
  — 
  subdivisions 
  of 
  the 
  order, 
  292 
  — 
  characters 
  of 
  Platy- 
  

   ptera, 
  292 
  — 
  of 
  Odonata, 
  292— 
  of 
  Ephemerina, 
  293— 
  characters 
  of 
  Neuro- 
  

   ptera, 
  293— 
  ligula, 
  293 
  — 
  thorax, 
  293— 
  wings, 
  293 
  — 
  abdomen, 
  294 
  — 
  subdi- 
  

   visions 
  of 
  the 
  order, 
  294 
  — 
  tabular 
  view 
  of 
  the 
  grand 
  divisions 
  of 
  winged 
  

  

  