﻿PLATE 
  IX. 
  

  

  Fig. 
  1. 
  Front 
  view 
  of 
  the 
  brain 
  of 
  Caloptenus 
  femur-rubrum 
  : 
  opt. 
  gang., 
  optic 
  ganglion; 
  

   oc, 
  ocelli 
  and 
  nerves 
  leading 
  to 
  them 
  from 
  the 
  two 
  hemispheres, 
  each 
  ocel- 
  

   lar 
  nerve 
  arising 
  from 
  the 
  region 
  containing 
  the 
  calices; 
  m. 
  oc, 
  median 
  

   ©cellar 
  nerve 
  ; 
  opt. 
  I., 
  optic 
  lobe 
  sending 
  off 
  the 
  optic 
  nerve 
  to 
  the 
  optic 
  

   ganglion; 
  ant. 
  1., 
  antennal 
  or 
  olfactory 
  lobe 
  ; 
  ant.n., 
  antennal 
  nerve 
  ; 
  /. 
  g. 
  y 
  

   frontal 
  ganglion 
  of 
  sympathetic 
  nerve; 
  Ibr. 
  n., 
  nerve 
  to 
  labrum 
  ; 
  x, 
  cross- 
  

   nerve 
  or 
  commissure 
  between 
  the 
  two 
  heinisimeres 
  ; 
  ce. 
  c, 
  oesophageal 
  com- 
  

   missure 
  to 
  suboesophageal 
  ganglion. 
  

  

  2. 
  Side 
  view 
  of 
  the 
  brain 
  and 
  suboesophageal 
  ganglion 
  (lettering 
  of 
  brain 
  as 
  in 
  

  

  fig. 
  1): 
  s. 
  g., 
  stomatogastric 
  or 
  sympathetic 
  nerve; 
  a. 
  s. 
  g., 
  anterior, 
  and 
  

   p. 
  s. 
  g., 
  posterior, 
  sympathetic 
  ganglia 
  ; 
  g. 
  2, 
  suboesophageal 
  ganglion; 
  md., 
  

   nerve 
  to 
  mandible 
  ; 
  mx., 
  maxillary 
  nerve 
  ; 
  In., 
  labial 
  nerve; 
  n. 
  ?, 
  unknown 
  

   nerve, 
  perhaps 
  salivary 
  ? 
  

  

  3. 
  Interior 
  view 
  of 
  the 
  right 
  half 
  of 
  the 
  head, 
  showing 
  the 
  brain 
  in 
  its 
  natural 
  

  

  position: 
  an., 
  antenna; 
  cl., 
  clypeus; 
  Ibr., 
  labrum; 
  m., 
  mouth 
  cavity 
  ; 
  md. 
  t 
  

   mandible; 
  t, 
  tougue; 
  ce., 
  oesophagus; 
  c, 
  crop; 
  en., 
  right 
  half 
  of 
  the 
  endo- 
  

   cranium 
  or 
  X-shaped 
  bone, 
  through 
  the 
  anterior 
  angle 
  of 
  which 
  the 
  oesopha- 
  

   gus 
  passes, 
  while 
  the 
  great 
  mandibular 
  muscles 
  play 
  in 
  the 
  lateral 
  angles. 
  

   The 
  moon-shaped 
  edge 
  is 
  that 
  made 
  by 
  the 
  knife 
  passing 
  through 
  the 
  center 
  

   of 
  the 
  X. 
  

  

  4. 
  View 
  of 
  brain 
  from 
  above 
  (letters 
  as 
  before). 
  

  

  5. 
  Suboesophageal 
  ganglion 
  from 
  above 
  : 
  t. 
  c, 
  commissure 
  to 
  the 
  succeeding 
  tho- 
  

  

  racic 
  ganglion 
  ; 
  other 
  letters 
  as 
  before. 
  

   Fig. 
  3 
  is 
  enlarged 
  eight 
  times 
  ; 
  all 
  the 
  rest 
  twenty-five 
  times. 
  

  

  Note. 
  — 
  The 
  figures 
  on 
  this 
  plate 
  were 
  drawn 
  from 
  original 
  dissectious 
  by 
  Mr. 
  

   Edward 
  Burgess. 
  

  

  