﻿342 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  The 
  mesosternum 
  is 
  triangular, 
  cordate, 
  one-half 
  as 
  long 
  as 
  wide 
  in 
  

   front; 
  distinctly 
  separated 
  by 
  suture 
  from 
  the 
  infra- 
  episternite, 
  with 
  

   a 
  deep 
  median 
  furrow. 
  The 
  meta- 
  as 
  the 
  mesosternite, 
  but 
  one-third 
  as 
  

   long. 
  

  

  Mantissa. 
  The 
  prosternum 
  is 
  very 
  long 
  and 
  narrow, 
  and 
  is 
  well 
  de- 
  

   veloped. 
  The 
  mesosternum 
  is 
  large, 
  broad, 
  about 
  one- 
  third 
  as 
  long 
  as 
  

   broad 
  ; 
  not 
  distinctly 
  separated 
  by 
  suture 
  from 
  the 
  episternnm 
  ; 
  in 
  this 
  

   respect 
  the 
  metasternum 
  is 
  the 
  same. 
  

  

  THE 
  ABDOMEN. 
  

  

  Ascalaphus. 
  (PL 
  LYII, 
  figs. 
  6, 
  7.) 
  The 
  abdomen 
  is 
  moderately 
  long, 
  

   spindle-shaped, 
  with 
  nine 
  uromeres. 
  

  

  Myrmeleon. 
  (PL 
  LYII, 
  figs. 
  8-10.) 
  Yery 
  long 
  and 
  slender, 
  more 
  as 
  

   in 
  Odonata 
  than 
  other 
  Neuroptera, 
  being 
  slender, 
  cylindrical. 
  There 
  

   are 
  seven 
  well 
  developed 
  tergites 
  ; 
  the 
  8th 
  and 
  9th 
  small, 
  the 
  9th 
  being 
  

   as 
  long 
  as 
  broad. 
  The 
  pleurites 
  are 
  broad, 
  well 
  developed, 
  membranous 
  ; 
  

   the 
  spiracles 
  distinct. 
  Of 
  the 
  urosternites 
  the 
  first 
  is 
  obsolete, 
  followed 
  

   by 
  six 
  well-developed 
  ones 
  ; 
  the 
  7th 
  well 
  developed, 
  oblong. 
  The 
  S 
  

   claspers 
  are 
  well 
  developed, 
  and 
  are 
  much 
  as 
  in 
  Odonata. 
  

  

  Folystoechotes. 
  (PL 
  LYIII, 
  figs. 
  2-4.) 
  The 
  abdomen 
  is 
  much 
  shorter 
  

   and 
  thicker 
  than 
  in 
  Myrmeleon. 
  There 
  are 
  ten 
  tergites; 
  the 
  2nd 
  subdi- 
  

   vided 
  into 
  two 
  subtergites, 
  appearing 
  as 
  if 
  two 
  tergites 
  ; 
  the 
  8th 
  is 
  one- 
  

   third 
  as 
  long 
  as 
  the 
  7th 
  ; 
  the 
  9th 
  one-half 
  as 
  long 
  as 
  the 
  8th; 
  the 
  10th 
  is 
  

   broader 
  than 
  long, 
  the 
  end 
  being 
  subcorneal. 
  The 
  pleurites 
  are 
  broad, 
  

   membranous, 
  six 
  pairs 
  of 
  spiracles 
  visible. 
  There 
  are 
  seven 
  urosternites, 
  

   the 
  first 
  membranous 
  and 
  obsolete 
  ; 
  the 
  seventh 
  longer 
  than 
  the 
  sixth. 
  

   No 
  uropods; 
  the 
  cercopoda 
  rudimentary. 
  

  

  Mantispa. 
  — 
  Broad 
  and 
  large, 
  nine 
  uromeres; 
  the 
  first 
  tergite 
  very 
  

   short; 
  ninth 
  uromere 
  very 
  short, 
  with 
  very 
  short 
  uropoda? 
  

  

  ' 
  Family 
  PANOEPID^. 
  Plate 
  LX. 
  

  

  THE 
  HEAD. 
  

  

  Panorpa.^^^ 
  (PL 
  LX, 
  figs. 
  1-3.) 
  No 
  true 
  occiput. 
  The 
  epicranium 
  is 
  

   swollen 
  on 
  the 
  vertex, 
  which 
  is 
  as 
  long 
  as 
  broad; 
  there 
  is 
  a 
  small 
  ocellar 
  

   area, 
  and 
  a 
  small 
  inter-antennal 
  area. 
  The 
  front 
  of 
  the 
  head 
  is 
  remark- 
  

   ably 
  elongated, 
  and 
  is 
  formed 
  by 
  the 
  great 
  development 
  of 
  the 
  clypeus. 
  

   The 
  labrum 
  ? 
  The 
  gense 
  form 
  an 
  elongated 
  tract, 
  and 
  the 
  gula? 
  

  

  The 
  submentum 
  is 
  a 
  little 
  longer 
  than 
  the 
  mentum, 
  while 
  the 
  lingua 
  

   is 
  short. 
  

  

  The 
  antennae 
  are 
  very 
  long 
  and 
  many-jointed, 
  as 
  in 
  moths, 
  and 
  the 
  

   minute 
  mandibles 
  are 
  situated 
  at 
  the 
  end 
  of 
  the 
  snout. 
  

  

  i^On 
  sending 
  the 
  specimen, 
  after 
  dissection, 
  to 
  Professor 
  Hagen, 
  he 
  kindly 
  informs 
  me 
  that 
  it 
  is 
  

   "perhaps 
  P. 
  de&iii« 
  Westw." 
  

  

  