﻿176 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  being, 
  when 
  distended, 
  a 
  quarter 
  of 
  an 
  inch 
  thick; 
  while 
  in 
  A. 
  purpuras- 
  

   eens 
  it 
  is 
  a 
  little 
  shorter, 
  only 
  extending 
  into 
  the 
  base 
  of 
  the 
  abdomen. 
  

   At 
  its 
  junction 
  with 
  the 
  proventriculus 
  or 
  fore 
  stomach 
  (Fig. 
  5, 
  pe) 
  six 
  

   toothed, 
  chitinous 
  plates 
  or 
  horny 
  ridges 
  radiate 
  from 
  the 
  opening 
  into 
  the 
  

   proventriculus, 
  being 
  the 
  continuations 
  of 
  the 
  six 
  principal 
  denticulate 
  

   ridges 
  in 
  the 
  proventricle. 
  The 
  latter 
  division 
  of 
  the 
  digestive 
  canal 
  is 
  

   small, 
  oval, 
  rounded, 
  no 
  longer 
  than 
  thick, 
  and 
  provided 
  on 
  the 
  inner 
  sur- 
  

   face 
  with 
  six 
  rows 
  of 
  large, 
  sharp, 
  finely 
  serrate, 
  triangular, 
  antero-poste- 
  

   riorly 
  compressed 
  teeth, 
  with 
  a 
  small 
  spine 
  on 
  each 
  side 
  at 
  the 
  base, 
  while 
  

   on 
  each 
  side 
  adjoining 
  are 
  secondary 
  small 
  conical 
  teeth 
  ; 
  there 
  are 
  about 
  

   fifteen 
  larger 
  teeth, 
  with 
  a 
  row 
  of 
  fifteen 
  lateral 
  ones 
  on 
  each 
  side, 
  making 
  

   45 
  in 
  each 
  set 
  or 
  series, 
  so 
  that 
  there 
  are 
  270 
  teeth 
  in 
  all. 
  Each 
  of 
  the 
  

   six 
  series 
  or 
  rows 
  is 
  separated 
  by 
  a 
  long, 
  narrow, 
  linear 
  chitinous 
  band. 
  

   The 
  smaller 
  lateral 
  teeth 
  are 
  not 
  antero-posteriorly 
  compressed, 
  but 
  are 
  

   rounded, 
  and 
  stand 
  separate 
  from 
  each 
  other. 
  

  

  At 
  the 
  beginning 
  of 
  the 
  true 
  stomach 
  (chyle-stomach 
  or 
  ventricle) 
  are 
  

   appended 
  two 
  coacal 
  appendages, 
  one 
  above 
  and 
  one 
  below, 
  and 
  much 
  

   broader 
  than 
  the 
  narrow 
  stomach 
  itself, 
  each 
  forming 
  a 
  flattened 
  docked 
  

   flap, 
  with 
  about 
  12 
  longitudinal 
  folds, 
  especially 
  marked 
  on 
  the 
  sides 
  

   next 
  to 
  the 
  crop. 
  The 
  stomach 
  is 
  slender, 
  and 
  without 
  diminishing 
  in 
  

   thickness 
  passes 
  backward 
  in 
  the 
  abdomen, 
  then 
  making 
  one 
  turn 
  be- 
  

   fore 
  terminating, 
  the 
  end 
  being 
  situated 
  where 
  the 
  numerous 
  urinary 
  

   tubes 
  (Fig. 
  5, 
  %r) 
  originate. 
  These 
  long, 
  fine, 
  thread-like 
  tubes 
  are 
  

   very 
  numerous 
  and 
  are 
  over 
  an 
  inch 
  long, 
  twisting 
  about 
  the 
  alimentary 
  

   canal, 
  and, 
  in 
  many 
  cases, 
  are 
  firmly 
  attached 
  by 
  their 
  ends 
  to 
  the 
  free 
  

   ends 
  of 
  the 
  two 
  coecal 
  lobes 
  of 
  the 
  stomach. 
  

  

  The 
  stomach 
  is 
  succeeded 
  by 
  the 
  intestine, 
  which 
  is 
  divided 
  into 
  a 
  

   short 
  ileum 
  and 
  a 
  colon. 
  The 
  former 
  is 
  but 
  little 
  smaller 
  in 
  front 
  than 
  

   the 
  stomach, 
  but 
  becoming 
  smaller 
  posteriorly 
  ; 
  it 
  makes 
  a 
  deep 
  S-shaped 
  

   bend. 
  The 
  colon 
  is 
  smaller 
  than 
  the 
  ileum. 
  The 
  long, 
  thick 
  rectum 
  is 
  

   situated 
  directly 
  under 
  the 
  tegument 
  of 
  the 
  back 
  of 
  the 
  end 
  of 
  the 
  

   abdomen, 
  the 
  anal 
  opening 
  being 
  but 
  little 
  smaller 
  than 
  the 
  diameter 
  of 
  

   the 
  rectum. 
  The 
  rectal 
  glands 
  are 
  but 
  slightly 
  developed 
  compared 
  

   with 
  those 
  of 
  the 
  locust. 
  The 
  salivary 
  glands 
  (Fig. 
  5, 
  sg) 
  are 
  in 
  loose 
  

   botryoidal 
  masses 
  somewhat 
  as 
  in 
  the 
  locust 
  (Caloptenus 
  femur 
  -rubrum). 
  

   They 
  discharge 
  the 
  salivary 
  fluid 
  through 
  the 
  salivary 
  ducts 
  (Fig. 
  5, 
  s 
  r') 
  

   into 
  the 
  base 
  of 
  the 
  mouth 
  near 
  the 
  tongue 
  (Fig. 
  5 
  % 
  t). 
  

  

  The 
  ovaries 
  are 
  two 
  in 
  number, 
  situated 
  one 
  on 
  each 
  side 
  of 
  the 
  turn 
  

   of 
  the 
  stomach. 
  Each 
  ovary 
  forms 
  a 
  triangular 
  conical 
  mass, 
  the 
  base 
  

   being 
  broad. 
  They 
  are 
  each 
  composed 
  of 
  about 
  40 
  long, 
  slender 
  ovarian 
  

   tubes, 
  each 
  tube 
  being 
  accompanied 
  by 
  a 
  tracheal 
  branch. 
  These 
  

   ovarian 
  tubes 
  unite 
  to 
  form 
  the 
  secondary 
  oviducts, 
  which 
  are 
  moder- 
  

   ately 
  long 
  and 
  unite 
  directly 
  under 
  the 
  lost 
  ganglion 
  to 
  form 
  the 
  main 
  

   oviduct 
  which 
  ends 
  in 
  the 
  copulatory 
  pouch 
  (Fig. 
  5, 
  v). 
  

  

  The 
  nervous 
  system 
  is 
  in 
  its 
  general 
  disposition 
  like 
  that 
  figured 
  and 
  

   described 
  in 
  our 
  account 
  of 
  Caloptenus. 
  Besides 
  the 
  brain 
  and 
  subeso- 
  

  

  