﻿PSEUDONEUROPTERA. 
  325 
  

  

  backwards. 
  From 
  the 
  tentli 
  urosome 
  apair 
  of 
  long, 
  multiarticulate 
  cer- 
  

   copoda 
  arise 
  from 
  broad 
  basal 
  ioints 
  or 
  flaps, 
  forming 
  lateral 
  anal 
  plates. 
  

  

  PsociD^. 
  Plate 
  XXXIX, 
  XLIII. 
  

  

  THE 
  HEAD. 
  

  

  Psocus 
  novce-scotice}^*' 
  (PI. 
  XXXIX, 
  figs. 
  Q-S.) 
  The 
  head 
  is 
  in 
  its 
  

   structure 
  allied 
  to 
  that 
  of 
  the 
  Perlidse. 
  Epicranium 
  horizontal, 
  nearly 
  

   as 
  long 
  as 
  broad, 
  being 
  square 
  on 
  the 
  sides. 
  Ocelli 
  situated 
  close 
  to- 
  

   gether 
  between 
  the 
  eyes. 
  Clypeus 
  very 
  large 
  and 
  swollen, 
  situated 
  be- 
  

   tween 
  the 
  antennae 
  5 
  in 
  front 
  is 
  a 
  semi-membranous 
  division, 
  which 
  may 
  

   be 
  the 
  ante-clypeus; 
  this 
  sclerite 
  is 
  not 
  quite 
  so 
  wide 
  as 
  the 
  large, 
  broad 
  

   labrum. 
  The 
  gular 
  region 
  and 
  mentum 
  are 
  broad. 
  

  

  THE 
  THORAX. 
  

  

  Ifotum, 
  

  

  Pronotum 
  (Psocus 
  novce-scotice 
  Walk). 
  Yery 
  small, 
  depressed, 
  over- 
  

   lapped 
  by 
  the 
  heade, 
  bing 
  much 
  reduced 
  in 
  size 
  compared 
  with 
  the 
  

   Perlidse. 
  

  

  Mesonotum 
  (PL 
  XLIII, 
  fig. 
  10) 
  very 
  high 
  and 
  convex 
  ; 
  seen 
  from 
  above, 
  

   much 
  rounded 
  in 
  front. 
  Prsescutum 
  large, 
  prominent, 
  high 
  and 
  rounded, 
  

   subcordate, 
  but 
  with 
  no 
  median 
  impressed 
  line. 
  

  

  Scutum 
  very 
  short 
  and 
  broad, 
  deeply 
  excavated 
  in 
  front 
  for 
  the 
  

   reception 
  of 
  the 
  prsescutum 
  ; 
  each 
  side 
  is 
  much 
  swollen, 
  the 
  swollen 
  

   areas 
  being 
  separated 
  by 
  the 
  broad 
  median 
  impressed 
  line. 
  

  

  Scutellum 
  small 
  and 
  short, 
  three 
  or 
  four 
  times 
  as 
  wide 
  as 
  long, 
  with 
  

   a 
  median 
  acute 
  angle 
  in 
  front, 
  and 
  angulated 
  on 
  each 
  side 
  anteriorly 
  j 
  

   while 
  from 
  each 
  posterior 
  angle 
  a 
  high 
  narrow 
  ridge 
  diverges 
  to 
  the 
  

   hinder 
  part 
  of 
  the 
  insertion 
  of 
  the 
  fore 
  wing. 
  No 
  postscutellum 
  is 
  

   visible. 
  

  

  Metanotum 
  (Fig. 
  11) 
  small, 
  one-half 
  as 
  long 
  as 
  the 
  mesonotum. 
  The 
  

   prsescutum 
  is 
  very 
  small, 
  sub 
  triangular, 
  broad 
  and 
  short, 
  depressed. 
  

   Scutum 
  one-quarter 
  as 
  long 
  as 
  broad, 
  consisting 
  of 
  two 
  inflated 
  halves, 
  

   with 
  a 
  median 
  imijressed 
  line. 
  

  

  Scutellum 
  minute, 
  rudimentary, 
  somewhat 
  rounded. 
  

  

  Pleurum, 
  

  

  Propleurum. 
  The 
  episternum 
  and 
  epimerum 
  rudimentary, 
  though 
  

   rather 
  long 
  j 
  while 
  the 
  coxa 
  and 
  trochantine 
  are 
  large 
  and 
  long, 
  being- 
  

   well 
  developed. 
  

  

  Mesopleurum. 
  (Fig. 
  12.) 
  Episternum 
  and 
  epimerum 
  long 
  and 
  narrow 
  ; 
  

   not 
  oblique, 
  but 
  vertical 
  ; 
  the 
  episternum 
  a 
  little 
  thicker 
  than 
  the 
  epi- 
  

   merum^ 
  

  

  i"A 
  large 
  species 
  of 
  Psocus 
  inhabiting 
  coniferous 
  trees 
  in 
  Maine; 
  kindly 
  identified 
  by 
  Dr. 
  Hagen. 
  

  

  