﻿PLATE 
  X. 
  

  

  Fig. 
  1. 
  — 
  Frontal 
  section 
  16, 
  through 
  the 
  front 
  of 
  the 
  brain 
  of 
  adult 
  Caloptenus 
  spretus; 
  

  

  X 
  i 
  inch 
  objective, 
  A. 
  eye-piece. 
  

   FlG. 
  2. 
  — 
  Section 
  17, 
  showing 
  the 
  central 
  body 
  (centr. 
  h.) 
  and 
  mushroom 
  body, 
  optic 
  

  

  and 
  antennal 
  lobes, 
  and 
  commissural 
  lobes 
  ; 
  X 
  fA. 
  

   FlG. 
  3. 
  — 
  Enlarged 
  view 
  of 
  the 
  trabecula 
  and 
  its 
  nerves, 
  of 
  the 
  mushroom 
  body, 
  its 
  

  

  calices 
  and 
  stalk, 
  and 
  the 
  origin 
  of 
  the 
  optic 
  nerves; 
  for 
  lettering 
  see 
  

  

  schedule. 
  X|A., 
  225 
  diameters. 
  

   FlG. 
  4. 
  — 
  Section 
  18, 
  passing 
  through 
  the 
  back 
  of 
  the 
  central 
  body, 
  showing 
  the 
  double 
  

  

  nature 
  of 
  the 
  stalk 
  of 
  the 
  mushroom 
  body, 
  and 
  passing 
  through 
  the 
  back 
  

  

  of 
  the 
  commissural 
  lobes 
  and 
  behind 
  the 
  trabecula 
  and 
  the 
  base 
  of 
  the 
  

  

  stalk 
  ; 
  X 
  i 
  A. 
  Are 
  oe. 
  n. 
  ? 
  the 
  origins 
  of 
  the 
  ocellar 
  nerves 
  ? 
  

   FlG. 
  5. 
  — 
  Vertical 
  (longitudinal) 
  section 
  through 
  one 
  of 
  the 
  hemispheres, 
  showing 
  the 
  

  

  origin 
  of 
  the 
  commissural 
  and 
  antennal 
  nerves 
  and 
  the 
  optic 
  lobe. 
  

   FlG. 
  6. 
  — 
  Longitudinal 
  section 
  through 
  the 
  brain 
  and 
  suboesophageal 
  ganglion 
  ( 
  X 
  50 
  

  

  diameters), 
  showing 
  the 
  two 
  portions 
  of 
  the 
  calyx, 
  the 
  antennal 
  lobe, 
  and 
  

  

  in 
  the 
  subcesophageal 
  ganglion 
  the 
  three 
  lobes 
  giving 
  off 
  respectively 
  the 
  

  

  mandibular, 
  maxillary, 
  and 
  labial 
  nerves. 
  

   Fig. 
  7. 
  — 
  Longitudinal 
  section 
  through 
  the 
  optic 
  ganglion 
  and 
  the 
  eye 
  ; 
  X 
  50 
  diameters. 
  

   FlG. 
  8. 
  — 
  Longitudinal 
  section 
  through 
  the 
  brain, 
  showing 
  the 
  calyx, 
  antennal 
  lobes, 
  

  

  and 
  commissural 
  lobes 
  ; 
  X 
  50 
  diameters. 
  

   FlG. 
  8 
  a. 
  — 
  Enlarged 
  view 
  of 
  Fig. 
  8 
  (X 
  i 
  B.), 
  showing 
  the 
  relations 
  in 
  a 
  longitudinal 
  

   section 
  of 
  the 
  calyx 
  to 
  the 
  stalk, 
  although 
  the 
  direct 
  connection 
  of 
  the 
  

   stalk 
  with 
  the 
  calyx 
  is 
  not 
  seen 
  in 
  this 
  section. 
  

  

  