﻿314 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  THE 
  THORAX. 
  

  

  Notum. 
  

  

  The 
  pronotum 
  (PI. 
  XXXIII, 
  fig. 
  6) 
  is 
  one-third 
  longer 
  than 
  wide. 
  

  

  The 
  mesonotum 
  (Fig. 
  7) 
  is 
  very 
  long, 
  though 
  shorter 
  than 
  in 
  Diaphero- 
  

   mera. 
  It 
  is 
  entire, 
  with 
  no 
  signs 
  of 
  subdivision 
  into 
  the 
  scutum, 
  scutel- 
  

   lum, 
  &c. 
  The 
  presence 
  of 
  the 
  small, 
  net-veined, 
  rudimentary 
  fore 
  wings 
  

   has 
  not 
  affected 
  or 
  produced 
  a 
  differentiation 
  of 
  the 
  notum, 
  the 
  insertion 
  

   of 
  the 
  wings 
  being 
  very 
  slightly 
  marked. 
  

  

  In 
  the 
  metanotumj 
  owing 
  to 
  the 
  long, 
  large 
  hind 
  wings, 
  with 
  weU 
  

   developed 
  muscular 
  attachments, 
  the 
  notum 
  is 
  differentiated 
  into 
  two 
  

   lateral 
  swellings, 
  which 
  correspond 
  to 
  two 
  halves 
  of 
  a 
  scutum; 
  while 
  

   the 
  scuteUum 
  is 
  represented 
  by 
  a 
  long, 
  moderately 
  broad 
  area, 
  rounded 
  

   in 
  front, 
  and 
  at 
  the 
  posterior 
  end 
  narrowed, 
  and 
  with 
  a 
  flattened, 
  boss- 
  

   like 
  swelling. 
  The 
  scutellum 
  is 
  about 
  one-half 
  as 
  wide 
  as 
  the 
  entire 
  

   notum, 
  and 
  on 
  the 
  sides 
  it 
  is 
  not 
  definitely 
  separated 
  from 
  the 
  sides 
  of 
  

   the 
  notum. 
  The 
  hind 
  edge 
  of 
  the 
  notum 
  is 
  emarginate, 
  forming 
  a 
  dis- 
  

   tinct, 
  rather 
  full 
  ridge 
  extending 
  across 
  the 
  notum. 
  This 
  may 
  repre- 
  

   sent 
  the 
  postscutellum; 
  but 
  most 
  probably 
  the 
  next 
  sclerite, 
  which 
  I 
  at 
  

   first 
  took 
  to 
  be 
  the 
  first 
  abdominal 
  segment, 
  is 
  the 
  postscutellum, 
  as 
  the 
  

   next 
  sclerite 
  bears 
  the 
  first 
  pair 
  of 
  spiracles. 
  

  

  Pleurum. 
  ^ 
  

  

  The 
  pleurites 
  are 
  very 
  much 
  as 
  described 
  in 
  Diapheromera, 
  but 
  the 
  

   large, 
  long 
  episterna 
  are 
  shorter 
  and 
  broader 
  than 
  in 
  Diapheromera, 
  

   corresponding 
  with 
  the 
  shorter 
  and 
  thicker 
  proportions 
  of 
  the 
  thorax. 
  

  

  Sternum, 
  

  

  The 
  prosternum 
  consists 
  of 
  two 
  sclerites, 
  as 
  in 
  Diapheromera. 
  The 
  

   mesosternum 
  is 
  shorter 
  and 
  broader, 
  but 
  otherwise 
  exactly 
  as 
  in 
  Diaphe- 
  

   romera. 
  The 
  metasternum 
  is 
  much 
  wider 
  than 
  in 
  Diapheromera, 
  with 
  

   a 
  narrow, 
  intercoxal 
  oblong 
  area, 
  as 
  in 
  Acrydii. 
  

  

  THE 
  ABDOMEN. 
  

  

  The 
  abdomen 
  repeats 
  that 
  of 
  Diapheromera 
  ; 
  counting 
  out 
  the 
  very 
  

   large 
  meta-postscutellum, 
  there 
  are 
  eleven 
  tergites 
  and 
  eight 
  uroster- 
  

   nites. 
  The 
  cercopoda 
  are 
  jointed, 
  short, 
  much 
  as 
  in 
  Mantis. 
  

  

  Note. 
  — 
  This 
  genus 
  connects 
  the 
  Phasmida 
  with 
  the 
  Acrydii, 
  Prosco- 
  

   pia 
  being 
  the 
  connecting 
  link 
  in 
  the 
  latter 
  family. 
  

  

  Family 
  AOEYDII. 
  

  

  THE 
  HEAD. 
  

  

  Caloptenus 
  spretus. 
  The 
  head, 
  as 
  in 
  the 
  other 
  genera 
  of 
  Acrydii, 
  is 
  

   compressed 
  so 
  that 
  the 
  front 
  is 
  high 
  and 
  narrow, 
  i^o 
  signs 
  of 
  an 
  occip- 
  

   ital 
  sclerite. 
  In 
  the 
  epicranium 
  the 
  vertex, 
  gense, 
  and 
  clypeus 
  are 
  well 
  

   developed. 
  The 
  epicranium 
  extends 
  below 
  the 
  middle 
  of 
  the 
  front, 
  but 
  

  

  