﻿454 
  

  

  JAMES 
  WATERSTON. 
  

  

  Head 
  (fig. 
  1, 
  a) 
  7:6; 
  vertex 
  rather 
  high 
  and 
  arched 
  ; 
  eyes 
  salient, 
  not 
  large, 
  

   only 
  a 
  little 
  over 
  one-half 
  (11 
  : 
  20) 
  the 
  depth 
  of 
  the 
  head, 
  separated 
  at 
  the 
  vertex 
  

   by 
  two-thirds 
  and 
  across 
  the 
  toruli 
  by 
  three-fifths 
  of 
  the 
  breadth. 
  Toruli 
  clear 
  of 
  

   the 
  base 
  line 
  of 
  the 
  eyes. 
  Lateral 
  ocelli 
  distant 
  from 
  one 
  another 
  by 
  one-third 
  more 
  

   than 
  the 
  length 
  of 
  either 
  from 
  the 
  orbits. 
  Genal 
  space 
  large, 
  one-half 
  the 
  depth 
  of 
  

   the 
  eye. 
  Antenna 
  (fig. 
  2, 
  a), 
  length 
  0-5 
  mm. 
  ; 
  scape 
  (4 
  : 
  1) 
  just 
  longer 
  than 
  pedicel, 
  

   ring 
  joint 
  and 
  first 
  of 
  the 
  funicle 
  together, 
  but 
  shorter 
  than 
  the 
  club 
  ; 
  pedicel 
  (12 
  : 
  7) 
  

   not 
  half 
  (3 
  : 
  7) 
  the 
  scape 
  ; 
  ring 
  joint 
  (fig 
  2, 
  b) 
  compound, 
  with 
  four 
  laminae, 
  the 
  middle 
  

   two 
  being 
  closely 
  united 
  ; 
  funicle 
  with 
  i-iii 
  equal, 
  with 
  a 
  length 
  of 
  21 
  and 
  a 
  breadth 
  

   diminishing 
  from 
  15-13 
  ; 
  club, 
  25 
  : 
  16 
  : 
  13, 
  with 
  widths 
  18 
  and 
  10 
  ; 
  sensoria 
  of 
  funicle 
  

   4:4-5:4; 
  club, 
  5:5:2. 
  

  

  The 
  clypeal 
  lobes 
  are 
  distinct 
  . 
  Labrum 
  minute, 
  with 
  one 
  bristle 
  (fig. 
  1 
  , 
  b) 
  . 
  Mandible 
  

   (fig. 
  1 
  , 
  c), 
  upper 
  broad 
  lobe 
  with 
  about 
  six 
  indistinct 
  denticles 
  ; 
  upper 
  internal 
  apodeme 
  

   as 
  large 
  as 
  or 
  larger 
  than 
  the 
  lower. 
  Stipes 
  with 
  one 
  lateral 
  bristle 
  beyond 
  one-half, 
  

   and 
  another 
  (minute) 
  at 
  same 
  level 
  near 
  the 
  middle 
  ; 
  maxillary 
  palpi 
  (5:1) 
  with 
  

   four 
  bristles 
  (subapical) 
  ; 
  galea 
  with 
  six 
  bristles 
  ; 
  mentum 
  with 
  one 
  bristle 
  ; 
  labial 
  

   palpi 
  (3 
  : 
  2) 
  one-fifth 
  of 
  the 
  maxillary 
  palpi, 
  with 
  two 
  terminal 
  bristles, 
  one 
  very 
  

   short 
  and 
  the 
  other 
  thrice 
  the 
  palpus 
  in 
  length 
  ; 
  four 
  setigerous 
  cells 
  on 
  the 
  lingua. 
  

  

  Fig. 
  2. 
  Tetrastichus 
  thripophonus, 
  Wtrst., 
  sp. 
  n. 
  : 
  a, 
  antenna 
  ; 
  b, 
  ring 
  joint 
  ; 
  c, 
  propodeon 
  ; 
  

  

  d, 
  ovipositor. 
  

  

  Thorax 
  narrower 
  (6 
  : 
  7) 
  than 
  head. 
  Pronotum 
  narrow, 
  lateral 
  ventral 
  angles 
  

   produced 
  and 
  rounded, 
  not 
  margined 
  posteriorly, 
  though 
  more 
  strongly 
  chitinised 
  

   round 
  the 
  stigma 
  ; 
  pattern 
  coarse, 
  regular, 
  distinctly 
  raised 
  ; 
  with 
  five 
  to 
  six 
  bristles 
  

   on 
  each 
  side 
  posteriorly, 
  leaving 
  about 
  the 
  middle 
  third 
  bare 
  ; 
  ten 
  minute 
  bristles 
  

   along 
  the 
  anterior 
  edge. 
  Mesonotum 
  : 
  scutum, 
  as 
  long 
  as 
  broad, 
  with 
  at 
  each 
  side 
  

   two 
  strong 
  lateral 
  bristles 
  on 
  posterior 
  half 
  ; 
  between 
  the 
  hinder 
  of 
  these 
  and 
  the 
  

   lateral 
  sulcus 
  is 
  a 
  very 
  minute 
  bristle 
  ; 
  pattern 
  very 
  fine, 
  longitudinally 
  drawn 
  out 
  ; 
  

   mid 
  line 
  faintly 
  impressed, 
  sub-obsolete 
  ; 
  parapsides 
  with 
  three 
  bristles, 
  the 
  pattern 
  

   less 
  drawn 
  out 
  than 
  on 
  scutum 
  ; 
  tegulae 
  with 
  two 
  bristles. 
  Scutellum 
  without 
  

   the 
  inner 
  pair 
  of 
  impressed 
  lines, 
  over 
  half 
  (4 
  : 
  7) 
  the 
  scutum, 
  truncated 
  behind 
  ; 
  

   on 
  each 
  side, 
  in 
  a 
  row, 
  are 
  one 
  strong 
  bristle 
  before, 
  one 
  clear 
  pustule 
  after 
  one-half, 
  

   and 
  one 
  shorter 
  bristle 
  at 
  the 
  posterior 
  edge. 
  These 
  rows 
  are 
  wide 
  apart 
  — 
  three- 
  

   fourths 
  the 
  length 
  of 
  the 
  scutellum 
  ; 
  pattern 
  even 
  finer 
  than 
  on 
  scutum 
  and 
  with 
  

   difficulty 
  distinguishable. 
  Axillae 
  with 
  one 
  minute 
  bristle 
  above 
  base 
  of 
  wing. 
  

  

  