﻿316 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  separated 
  by 
  an 
  oblique 
  suture 
  from 
  the 
  sternum. 
  The 
  epimerum 
  is 
  

   less 
  reg^ularin 
  shape 
  than 
  in 
  the 
  mesopleurum, 
  and 
  is 
  more 
  oblique 
  and 
  a 
  

   little 
  curved. 
  The 
  trochantines 
  are 
  large 
  and 
  longer 
  than 
  those 
  of 
  the 
  

   two 
  anterior 
  jiair 
  of 
  limbs. 
  The 
  coxae 
  are 
  but 
  slightly 
  developed. 
  The 
  

   trochanter 
  is 
  oblong, 
  though 
  longer 
  than 
  thick. 
  

  

  Ill 
  the 
  Orthopteragenuinaj 
  Blatta 
  excepted, 
  the 
  trochantines 
  and 
  coxae 
  

   are 
  very 
  small, 
  owing 
  to 
  the 
  large 
  pleura 
  and 
  sterna. 
  

  

  Sternum, 
  

  

  The 
  prosternum 
  (PI. 
  XXXI) 
  is 
  short 
  in 
  front, 
  small, 
  broad, 
  triangular, 
  

   with 
  a 
  scutellate 
  expansion 
  between 
  the 
  coxae, 
  and 
  a 
  central, 
  long, 
  acute 
  

   conical 
  tubercle 
  5 
  behind, 
  the 
  sternum 
  expands 
  on 
  each 
  side 
  behind 
  the 
  

   legs, 
  and 
  is 
  on 
  the 
  same 
  plane 
  as 
  the 
  mesosternum, 
  but 
  separated 
  from 
  

   it 
  by 
  a 
  well-defined 
  suture 
  5 
  it 
  extends 
  far 
  up 
  on 
  each 
  side 
  of 
  the 
  thorax. 
  

  

  The 
  mesosternum 
  (PI. 
  XXXII) 
  is 
  not 
  so 
  loog 
  as 
  broad, 
  but 
  is 
  large, 
  not 
  

   extending 
  up 
  above 
  the 
  insertion 
  of 
  the 
  middle 
  pair 
  of 
  legs 
  j 
  the 
  surface 
  

   is 
  a 
  little 
  convex 
  5 
  the 
  hinder 
  edge 
  is 
  excavated, 
  a 
  square 
  portion 
  of 
  the 
  

   metasternum 
  being 
  dovetailed 
  into 
  it. 
  

  

  The 
  metasternum 
  (PI. 
  XXXII) 
  is 
  wider 
  and 
  longer 
  than 
  the 
  mesoster- 
  

   num, 
  the 
  sides 
  extending 
  up 
  the 
  thorax. 
  The 
  sternum 
  is 
  divided 
  into 
  

   four 
  parts 
  by 
  sutures 
  ; 
  the 
  anterior 
  part 
  has 
  just 
  been 
  described, 
  the 
  pos- 
  

   terior 
  is 
  a 
  piece 
  nearly 
  as 
  long 
  and 
  a 
  little 
  wider 
  than 
  the 
  first 
  urosternite, 
  

   and 
  sends 
  a 
  square 
  portion 
  corresponding 
  to, 
  but 
  smaller 
  than, 
  the 
  one 
  

   on 
  the 
  mesosternum 
  into 
  the 
  latter 
  sclerite 
  ; 
  the 
  two 
  lateral 
  narrow 
  parts 
  

   lie 
  next 
  to 
  the 
  coxae. 
  

  

  THr, 
  ABDOMEN. 
  

  

  There 
  are 
  ten 
  uromeres 
  (PI. 
  XXXIY-XXXYIII), 
  represented 
  by 
  ten 
  

   tergites, 
  and 
  seven 
  urosteruites 
  5 
  no 
  pleurites 
  are 
  developed, 
  the 
  eight 
  

   pairs 
  of 
  spiracles 
  opening 
  on 
  the 
  lower 
  edge 
  of 
  the 
  tergites. 
  The 
  tenth 
  

   tergite 
  is 
  telson-like, 
  with 
  a 
  triangular 
  pleurite, 
  on 
  each 
  side 
  bearing 
  the 
  

   cercopoda, 
  which 
  are 
  not 
  jointed. 
  The 
  tenth 
  tergite 
  extends 
  beyond 
  the 
  

   base 
  of 
  the 
  upper 
  pair 
  of 
  rhabdites. 
  

  

  PROSCOPIA. 
  

   THE 
  HEAD. 
  

  

  The 
  high, 
  vertical 
  prolongation 
  of 
  the 
  head 
  in 
  this 
  remarkable 
  insect 
  

   is 
  a 
  development 
  of 
  the 
  epicranium; 
  the 
  occipital 
  region 
  of 
  the 
  epicran- 
  

   ium 
  is 
  also 
  greatly 
  produced, 
  carrying 
  the 
  eyes 
  and 
  insertion 
  of 
  the 
  anten- 
  

   nae 
  much 
  beyond 
  the 
  middle 
  of 
  the 
  head 
  5 
  the 
  space 
  between 
  the 
  eyes 
  is 
  

   very 
  narrow. 
  The 
  singular, 
  four-angled 
  process 
  projecting 
  above 
  the 
  in- 
  

   sertion 
  of 
  the 
  antennae 
  arises 
  from 
  the 
  vertical 
  rather 
  tha,n 
  from 
  the 
  

   frontal 
  region 
  of 
  the 
  epicranium, 
  as 
  there 
  is 
  a 
  long 
  space 
  between 
  the 
  

   insertion 
  of 
  the 
  antennae 
  and 
  eyes 
  and 
  the 
  clypeus. 
  The 
  latter 
  is 
  very 
  

   short 
  and 
  divided 
  into 
  post, 
  and 
  anteclypeus, 
  though 
  the 
  two 
  divisions 
  

   are 
  not 
  separated 
  by 
  a 
  distinct 
  suture. 
  The 
  labrum 
  is 
  deeply 
  hollowed 
  

   out 
  in 
  front. 
  

  

  