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  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  the 
  same 
  width 
  ; 
  the 
  folds 
  are 
  not 
  quite 
  regular, 
  but 
  sinuous 
  in 
  outline, 
  

   though, 
  roughly 
  speaking, 
  they 
  are 
  all 
  parallel 
  to 
  one 
  another. 
  Under 
  

   a 
  higher 
  power, 
  the 
  epithelium 
  is 
  seen 
  to 
  he 
  composed 
  of 
  cells, 
  which, 
  

   viewed 
  from 
  above, 
  present 
  a 
  polygonal 
  outline, 
  varying 
  with 
  each 
  cell, 
  

   as 
  is 
  seen 
  in 
  Fig. 
  23 
  ; 
  the 
  nuclei 
  appear 
  nearly 
  in 
  the 
  center 
  of 
  the 
  cells 
  ; 
  

   they 
  are 
  oval, 
  and 
  coarsely 
  granular, 
  the 
  granules 
  being 
  darkly 
  colored 
  

   by 
  hsematoxiline 
  and 
  all 
  of 
  nearly 
  uniform 
  size 
  ; 
  I 
  failed 
  to 
  detect 
  any 
  

   nucleolus. 
  The 
  relations 
  of 
  the 
  epithelium 
  to 
  the 
  remaining 
  layers 
  

   of 
  the 
  uterine 
  walls 
  appear 
  best 
  in 
  longitudinal 
  sections, 
  because 
  in 
  

   them 
  the 
  folds 
  are 
  cut 
  across. 
  Fig. 
  22 
  is 
  taken 
  from 
  a 
  section 
  of 
  a 
  

   uterus 
  distended 
  with 
  eggs, 
  and 
  therefore 
  with 
  the 
  folds 
  very 
  much 
  

   drawn 
  out. 
  The 
  cells 
  of 
  the 
  epithelium, 
  Fig. 
  22 
  ep, 
  are 
  " 
  cylinder 
  cells," 
  

   with 
  the 
  large 
  nuclei 
  lying 
  somewhat 
  towards 
  their 
  free 
  or 
  inner 
  ends. 
  

   Their 
  appearance 
  is 
  better 
  shown 
  in 
  the 
  enlarged 
  drawing, 
  Fig. 
  18 
  ; 
  

   they 
  are 
  sharply 
  separated 
  from 
  one 
  another 
  ; 
  their 
  protoplasm 
  is 
  finely 
  

   granular, 
  the 
  granules 
  being 
  unequally 
  distributed 
  so 
  that 
  some 
  parts 
  

   of 
  the 
  cells 
  appear 
  clearer 
  than 
  others. 
  The 
  free 
  surface 
  of 
  the 
  cells 
  is 
  

   nearly 
  if 
  not 
  quite 
  flat, 
  while 
  their 
  outer 
  ends 
  or 
  those 
  which 
  rest 
  upon 
  

   the 
  connective 
  tissue 
  (conn.) 
  are 
  often 
  rounded 
  ; 
  finally, 
  the 
  cells 
  are 
  not 
  

   all 
  of 
  the 
  same 
  height. 
  Outside 
  the 
  epithelium 
  follows 
  a 
  layer 
  of 
  fibrous 
  

   tissue, 
  in 
  which 
  the 
  tracheae 
  ramify, 
  Fig. 
  22, 
  and 
  which 
  contains 
  numer- 
  

   ous 
  small, 
  oval 
  nuclei 
  belonging 
  to 
  the 
  cells 
  of 
  the 
  tissue 
  and 
  elongated 
  

   nuclei 
  of 
  the 
  fine 
  tracheal 
  branches, 
  as 
  represented 
  in 
  Fig. 
  7. 
  Outside 
  

   the 
  connective 
  tissue 
  lie 
  the 
  muscular 
  layers, 
  Fig. 
  22 
  muc, 
  the 
  fibres 
  of 
  

   which 
  are 
  all 
  smooth 
  and 
  not 
  striated. 
  They 
  are 
  arranged 
  so 
  as 
  to 
  form 
  

   an 
  internal 
  circular, 
  and 
  a 
  much 
  more 
  powerful 
  external 
  longitudinal 
  

   coat, 
  that 
  is 
  very 
  distinctly 
  shown 
  in 
  Fig. 
  22. 
  Within, 
  the 
  epithelium 
  

   is 
  covered 
  by 
  a 
  layer 
  of 
  fibrous 
  matter, 
  Or., 
  that 
  fills 
  up 
  the 
  whole 
  space 
  

   between 
  the 
  uterine 
  walls 
  and 
  the 
  eggs. 
  In 
  many 
  sections 
  there 
  are 
  

   nuclei 
  contained 
  in 
  this 
  mass, 
  closely 
  similar 
  to 
  those 
  in 
  the 
  underlying 
  

   epithelium. 
  As 
  to 
  the 
  nature 
  of 
  this 
  layer 
  and 
  the 
  source 
  of 
  the 
  nuclei 
  

   I 
  cannot 
  venture 
  an 
  opinion. 
  

  

  The 
  remaining 
  portions 
  of 
  the 
  efferent 
  ducts 
  of 
  the 
  female 
  apparatus 
  

   I 
  have 
  not 
  investigated. 
  I 
  particularly 
  regret 
  my 
  inability 
  to 
  give 
  some 
  

   account 
  of 
  the 
  receptaculum 
  seminis. 
  The 
  reader 
  will 
  find 
  some 
  unsat- 
  

   isfactory, 
  because 
  very 
  brief, 
  notices 
  of 
  the 
  female 
  appendices 
  in 
  Ley- 
  

   dig's 
  Textbook, 
  277 
  and 
  a 
  more 
  elaborate 
  monograph 
  278 
  by 
  the 
  same 
  author 
  

   giving 
  a 
  general 
  account 
  of 
  the 
  structure 
  of 
  the 
  receptaculum 
  in 
  insects, 
  

   but 
  containing 
  no 
  new 
  observations 
  on 
  the 
  Orthoptera, 
  though 
  in 
  a 
  

   previous 
  article 
  279 
  Leydig 
  has 
  described 
  the 
  " 
  Samentasche" 
  in 
  this 
  order 
  

   as 
  being 
  lined 
  by 
  an 
  epithelium, 
  which 
  rests 
  on 
  a 
  tunica 
  propria 
  and 
  

   bears 
  a 
  chitinous 
  cuticula, 
  and 
  outside 
  of 
  which 
  is 
  a 
  thin 
  layer 
  of 
  striated 
  

   muscle. 
  The 
  part 
  that 
  Dufour 
  280 
  calls 
  the 
  u 
  glande 
  sebijique" 
  is 
  really 
  the 
  

  

  277 
  Leydig: 
  Lehrbucli 
  dor 
  Histologic, 
  p. 
  544. 
  

  

  2™ 
  Nova 
  Acta, 
  xxxiii 
  (1867). 
  

  

  »»Miiller'a 
  Arch., 
  1859, 
  p. 
  80. 
  

  

  ™°Ditfour: 
  Reoherches 
  sur 
  loa 
  Orthopteres, 
  1. 
  c. 
  325, 
  PI. 
  II, 
  fig. 
  17 
  c. 
  

  

  