﻿TABLE 
  OF 
  CONTENTS. 
  V 
  

  

  CHAPTER 
  VI. 
  

  

  Page. 
  

  

  The 
  southern 
  limits 
  of 
  the 
  distribution 
  of 
  the 
  rocky 
  mountain 
  

  

  LOCUST 
  156 
  

  

  Few 
  locusts 
  permanently 
  breeding 
  in 
  New 
  Mexico, 
  and 
  none 
  in 
  Arizona, 
  

   156 
  — 
  Caloptcnus 
  spretus 
  probably 
  not 
  in 
  Southern 
  New 
  Mexico, 
  Central 
  and 
  

   Southern 
  Arizona, 
  &c, 
  156 
  — 
  History 
  of 
  locust 
  invasions 
  in 
  New 
  Mexico 
  

   from 
  1864 
  to 
  1879, 
  157-159 
  — 
  Southern 
  range 
  of 
  the 
  locust 
  in 
  New 
  Mexico, 
  

   159 
  — 
  Changes 
  in 
  the 
  map 
  in 
  Report 
  I, 
  showing 
  the 
  distribution 
  of 
  the 
  

   locust, 
  159, 
  160. 
  

  

  CHAPTER 
  VII. 
  

  

  Summary 
  of 
  locust 
  flights 
  from 
  1877 
  to 
  1879 
  160 
  

  

  General 
  remarks 
  on 
  Maps 
  Nos. 
  2 
  to 
  4, 
  160, 
  101— 
  Flights 
  of 
  locusts 
  in 
  1878, 
  

   161, 
  162— 
  Flights 
  in 
  1879, 
  162, 
  163. 
  

  

  CHAPTER 
  VIII. 
  

   The 
  western 
  cricket 
  163 
  

  

  Difference 
  in 
  habits 
  between 
  the 
  western 
  cricket 
  and 
  the 
  locust, 
  163 
  — 
  Occur- 
  

   rence 
  of 
  Anabrus 
  purpurascens, 
  163, 
  164 
  — 
  of 
  A. 
  simplex, 
  164 
  — 
  Mode 
  of 
  egg- 
  

   laying, 
  164 
  — 
  Movements 
  of 
  an 
  army 
  of 
  the 
  western 
  cricket, 
  164, 
  165 
  — 
  Its 
  

   ravages, 
  165, 
  166 
  — 
  Its 
  food, 
  166 
  — 
  Its 
  enemies 
  and 
  parasites, 
  166— 
  Its 
  breed- 
  

   ing 
  habits, 
  166, 
  167— 
  Remedies, 
  167, 
  168— 
  Geographical 
  distribution 
  of 
  the 
  

   species 
  of 
  Anabrus, 
  168, 
  169 
  — 
  Synopsis 
  of 
  the 
  species 
  of 
  Anabrus 
  and 
  its 
  

   allies, 
  169, 
  170 
  — 
  External 
  anatomy 
  of 
  Anabrus, 
  170 
  — 
  the 
  head, 
  170-172 
  — 
  

   the 
  thorax, 
  172-174 
  — 
  the 
  abdomen, 
  174, 
  175 
  — 
  Internal 
  anatomy 
  of 
  Anabrus 
  

   jmrpurascens, 
  175 
  — 
  the 
  digestive 
  system, 
  175,176 
  — 
  the 
  nervous 
  system, 
  

   176, 
  177 
  — 
  the 
  breathing 
  apparatus, 
  177, 
  178. 
  

  

  CHAPTER 
  IX. 
  

  

  The 
  air-sacs 
  of 
  locusts 
  with 
  reference 
  to 
  their 
  powers 
  of 
  flight 
  178 
  

  

  History 
  of 
  the 
  study 
  of 
  the 
  air-sacs, 
  178 
  — 
  Air-sacs 
  in 
  different 
  insects, 
  178, 
  179 
  

   — 
  The 
  air-sacs 
  of 
  the 
  Acrydii, 
  179 
  — 
  Use 
  of 
  the 
  air-sacs 
  in 
  flight, 
  179-182 
  — 
  

   Their 
  origin, 
  182, 
  183. 
  

  

  CHAPTER 
  X. 
  

  

  Histology 
  of 
  the 
  locust 
  (Caloptenus) 
  and 
  the 
  cricket 
  (Anabrus) 
  183 
  

  

  Study 
  of 
  histology 
  of 
  insects, 
  183, 
  184 
  — 
  Explanations 
  of 
  Figs. 
  1 
  and 
  2, 
  Plate 
  

   II, 
  185, 
  186— 
  The 
  cuticula, 
  186-188— 
  The 
  epidermis, 
  188, 
  189— 
  Sense 
  organs, 
  

   189 
  — 
  Nervous 
  system, 
  190 
  — 
  Trachea?, 
  191-195 
  — 
  Air-sacs 
  and 
  spiracles, 
  195 
  — 
  

   Muscles, 
  195, 
  196 
  — 
  Organs 
  of 
  circulation, 
  196 
  — 
  Connective 
  tissue, 
  196-198 
  — 
  

   Ovary, 
  198-201— 
  Anterior 
  ca3cum 
  of 
  the 
  oviduct, 
  201 
  — 
  Uterus 
  of 
  locusts, 
  

   201-203— 
  Male 
  organs, 
  203— 
  Testis, 
  203, 
  204— 
  Development 
  of 
  the 
  sperma- 
  

   tozoa, 
  204-207 
  — 
  Vasa 
  defercntia, 
  207 
  — 
  Ductus 
  ejofulatorius, 
  207 
  — 
  Vesicular 
  

   seminales, 
  207, 
  208— 
  Digestive 
  canal, 
  208-210— 
  Crop, 
  210, 
  211— 
  Proventricu- 
  

   lus, 
  211, 
  212— 
  Stomach, 
  212-214— 
  Diverticula, 
  214, 
  215— 
  Gastro-ileal 
  folds, 
  

   215-217— 
  Ileum, 
  217— 
  Colon, 
  217, 
  218— 
  Rectum, 
  218, 
  219— 
  Summary 
  on 
  the 
  

   digestive 
  canal, 
  219-221 
  — 
  Malpighiau 
  vessels, 
  222. 
  

  

  CHAPTER 
  XI. 
  

   The 
  brain 
  of 
  the 
  locust 
  223 
  

  

  The 
  nervous 
  system 
  in 
  general, 
  223, 
  224 
  — 
  The 
  brain 
  of 
  insects 
  compared 
  with 
  

   that 
  of 
  vertebrates, 
  224-226— 
  The 
  brain 
  of 
  the 
  adult 
  locust, 
  226— 
  Histologi- 
  

   cal 
  elements 
  of 
  the 
  brain, 
  226-228 
  — 
  The 
  sections 
  of 
  the 
  brain, 
  228-230 
  — 
  In- 
  

   ternal 
  topography 
  of 
  the 
  brain, 
  230 
  — 
  The 
  central 
  body, 
  230, 
  231 
  — 
  The 
  

   mushroom 
  bodies, 
  231-234 
  — 
  The 
  optic 
  lobes, 
  234 
  — 
  The 
  optic 
  ganglion, 
  234 
  

  

  