﻿326 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  Metapleicrum. 
  (Fig. 
  12.) 
  Episternum 
  mucli 
  as 
  in 
  mesothorax, 
  but 
  the 
  

   epimerum 
  is 
  narrow, 
  triangular, 
  and 
  reduced 
  to 
  a 
  point 
  next 
  to 
  the 
  

   trochantine. 
  Coxa 
  and 
  trochantine 
  well 
  developed, 
  rather 
  long 
  and 
  

   large 
  ; 
  the 
  coxa 
  considerably 
  narrower 
  than 
  the 
  trochantine. 
  

  

  Sternum. 
  

  

  Frosternnm. 
  Yery 
  small, 
  rudimentary. 
  

  

  Mesosternum 
  very 
  small, 
  triangular 
  ; 
  the 
  coxae 
  nearly 
  meeting 
  on 
  the 
  

   median 
  line 
  of 
  the 
  body. 
  

   Metasternum 
  small. 
  

  

  Termitid^. 
  Plates 
  XXXIX, 
  figs. 
  1-5; 
  XL, 
  figs. 
  3, 
  4, 
  8; 
  XLI, 
  XLII, 
  

  

  XLIII, 
  figs. 
  1-9. 
  

  

  THE 
  HEAD. 
  

  

  Termopsis 
  angnsticollis. 
  (PI. 
  XXXIX, 
  figs. 
  1-3.) 
  The 
  head 
  is 
  broad 
  

   and 
  flat, 
  oblong-oval 
  in 
  shape. 
  The 
  epicranial 
  region 
  is 
  remarkably 
  

   simple, 
  not 
  subdivided, 
  with 
  no 
  Y-shaped 
  suture, 
  and 
  the 
  eyes 
  are 
  very 
  

   small. 
  The 
  clypeus 
  is 
  very 
  simple, 
  very 
  shor^ 
  and 
  broad 
  ; 
  and 
  only 
  an 
  

   impressed 
  line, 
  no 
  suture, 
  separates 
  it 
  from 
  the 
  epicranium. 
  The 
  labrum 
  

   is 
  large, 
  one-half 
  as 
  long 
  as 
  broad, 
  and 
  much 
  longer 
  than 
  the 
  clypeus. 
  The 
  

   gense 
  are 
  separated 
  from 
  the 
  upper 
  portion 
  of 
  the 
  epicranium 
  by 
  a 
  sharp, 
  

   lateral, 
  conspicuous 
  ridge. 
  The 
  gular 
  region 
  is 
  small, 
  membranous. 
  

   The 
  labium 
  is 
  not 
  differentiated 
  into 
  a 
  submentum 
  and 
  mentum. 
  

  

  In 
  Termes 
  Jiavipes 
  (figs. 
  4, 
  5) 
  the 
  head 
  is 
  oblong, 
  with 
  faint 
  traces 
  of 
  a 
  

   Y-shaped 
  suture; 
  the 
  clypeus 
  is 
  subdivided 
  into 
  an 
  anterior 
  and 
  pos-"^ 
  

   terior 
  portion, 
  the 
  two 
  subequal 
  and 
  well 
  marked. 
  

  

  THE 
  THORAX. 
  

  

  Notum. 
  

  

  Pronotum 
  ( 
  Termopsis). 
  (PL 
  XLIII, 
  fig. 
  1.) 
  Somewhat 
  crescent 
  shaped, 
  

   being 
  excavated 
  in 
  front 
  and 
  rounded 
  behind. 
  

  

  Mesonotum. 
  (Fig. 
  2.) 
  Eemarkably 
  square, 
  as 
  long 
  as 
  broad, 
  with 
  the 
  

   elements 
  but 
  partly 
  differentiated, 
  an 
  approach 
  to 
  that 
  of 
  Pteronarcys, 
  

   the 
  slight 
  partial 
  anterior 
  attachment 
  of 
  the 
  wings 
  being 
  correlated 
  

   with 
  the 
  undeveloped 
  nature 
  of 
  the 
  tergal 
  sclerites. 
  The 
  prsescutum 
  

   is 
  not 
  visible. 
  

  

  The 
  scutellum 
  is 
  not 
  differentiated 
  from 
  the 
  scutum; 
  the 
  latter 
  

   forming 
  a 
  somewhat 
  swollen 
  flattened 
  boss 
  on 
  each 
  side, 
  but 
  in 
  the 
  

   middle 
  of 
  the 
  notum 
  contracted, 
  becoming 
  narrow, 
  the 
  region 
  where 
  

   the 
  scutellum 
  usually 
  is 
  being 
  about 
  a 
  quarter 
  less 
  wide 
  than 
  the 
  scutal 
  

   region. 
  Postscutellum 
  wanting. 
  

  

  Metanotum. 
  (Fig. 
  3.) 
  Considerably 
  smaller 
  than 
  the 
  mesonotum, 
  

   hour-glass 
  shaped, 
  being 
  much 
  contracted 
  in 
  the 
  middle, 
  forming 
  an 
  

  

  