﻿320 
  EEPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  Metanotum. 
  On 
  the 
  same 
  plan 
  as 
  the 
  mesonotum, 
  but 
  about 
  three 
  

   times 
  as 
  long; 
  the 
  scutum 
  is 
  very 
  short 
  and 
  slightly 
  depressed 
  in 
  the 
  

   middle, 
  enlarging 
  and 
  swollen 
  on 
  the 
  sides. 
  The 
  scutellum 
  is 
  of 
  the 
  

   same 
  sbape 
  as 
  in 
  the 
  mesonotum, 
  but 
  much 
  larger; 
  behind 
  it 
  is 
  a 
  mod- 
  

   erately 
  broad, 
  flat 
  band, 
  representing 
  the 
  postscutellum. 
  

  

  Fleurum. 
  

  

  Propleurum. 
  In 
  the 
  prothorax 
  the 
  episternum 
  is 
  represented 
  by 
  two 
  

   small 
  sclerites, 
  one 
  forming 
  a 
  spine. 
  The 
  epimerum 
  is 
  minute, 
  rudi- 
  

   mentary, 
  submembranous. 
  The 
  coxa 
  and 
  trochantiue 
  are 
  consolidated 
  

   into 
  a 
  single, 
  large, 
  thick 
  coxal 
  joint. 
  The 
  prostigmata 
  are 
  rather 
  large 
  

   and 
  situated 
  on 
  a 
  distinct 
  peritreme. 
  

  

  Mesopleurum. 
  The 
  episternum 
  is 
  divided 
  into 
  three 
  sclerites, 
  the 
  upper 
  

   much 
  larger 
  than 
  the 
  two 
  lower 
  sclerites, 
  and 
  triangular, 
  with 
  the 
  apex 
  

   produced 
  towards 
  the 
  insertion 
  of 
  the 
  wings, 
  but 
  not 
  extending 
  up 
  so 
  

   high 
  as 
  the 
  epimerum. 
  Of 
  the 
  two 
  other 
  sclerites 
  one 
  is 
  supracoxal, 
  and 
  

   the 
  other 
  is 
  next 
  to 
  the 
  sternum. 
  The 
  epimerum 
  is 
  a 
  large, 
  lanceulate- 
  

   oval, 
  scale-like, 
  single 
  sclerite, 
  with 
  the 
  ]josterior 
  edge 
  free, 
  below 
  which 
  

   is 
  the 
  mesostigma. 
  

  

  Metapleurum. 
  This 
  is 
  much 
  larger 
  than 
  the 
  pleurum 
  of 
  the 
  meso- 
  

   thorax. 
  The 
  episternum 
  is 
  large, 
  oblique, 
  narrow 
  triangular, 
  with 
  the 
  

   apex 
  extendiiig 
  as 
  far 
  as 
  the 
  upper 
  end 
  of 
  the 
  epimerum; 
  the 
  latter 
  is 
  

   quite 
  wide, 
  narrowing 
  below; 
  the 
  hind 
  margin 
  is 
  not, 
  however, 
  free. 
  

  

  Sternum. 
  

  

  Prosterniim. 
  This 
  is 
  in 
  part 
  rudimentary, 
  and 
  consists 
  of 
  a 
  transverse 
  

   row 
  of 
  three 
  small 
  sclerites 
  surrounded 
  by 
  membrane, 
  behind 
  which 
  

   are 
  two 
  larger 
  sclerites, 
  and 
  above, 
  on 
  each 
  side, 
  is 
  a 
  subtriangular 
  piece. 
  

   Between 
  the 
  coxse, 
  which 
  are 
  wide 
  apart, 
  is 
  a 
  small, 
  triangular 
  sternite, 
  

   which 
  sends 
  off 
  long, 
  chitinous 
  angles 
  towards 
  the 
  episternal 
  spines. 
  

   Behind 
  this 
  is 
  a 
  narrow, 
  long, 
  scutel-like 
  sclerite. 
  

  

  MesO' 
  and 
  metasternum. 
  These 
  are 
  both 
  large, 
  broad, 
  solid 
  sclerites, 
  as 
  

   long 
  as 
  broad, 
  angulated 
  obtusely 
  on 
  the 
  sides, 
  and 
  notched 
  in 
  the 
  mid- 
  

   dle 
  of 
  the 
  posterior 
  margin, 
  especially 
  on 
  the 
  metathorax. 
  

  

  THE 
  ABDOMEN. 
  

  

  There 
  are 
  eleven 
  uromeres 
  : 
  eleven 
  tergites, 
  the 
  11th 
  being 
  the 
  supra- 
  

   anal 
  plate; 
  the 
  10th 
  is 
  narrower 
  than 
  the 
  9th, 
  and 
  situated 
  between 
  the 
  

   cercopoda, 
  which 
  are 
  large 
  and 
  long 
  and 
  obscurely 
  jointed. 
  The 
  11th 
  

   tergite 
  is 
  separated 
  by 
  a 
  faint 
  suture 
  from 
  the 
  10th 
  tergite. 
  The 
  pleural 
  

   region 
  is 
  rather 
  broad, 
  bearing 
  the 
  eight 
  pairs 
  of 
  stigmata. 
  Tliere 
  are 
  

   eight 
  well 
  developed 
  urosteruites; 
  the 
  7th 
  is 
  twice 
  as 
  long 
  as 
  the 
  basal 
  

   seven. 
  The 
  8th 
  is 
  small 
  and 
  rounded 
  behind. 
  

  

  THE 
  HE4D. 
  

  

  Gn/llotalpa 
  horealis. 
  The 
  head 
  and 
  protliorax 
  are 
  admirably 
  adapted 
  

   to 
  the 
  fossorial 
  habits 
  of 
  this 
  insect. 
  The 
  head 
  is 
  long, 
  and 
  rounded 
  

  

  