﻿56 
  

  

  JAMES 
  WATERSTON. 
  

  

  Both 
  sexes 
  have 
  the 
  pale 
  basal 
  abdominal 
  spots 
  and 
  blotch— 
  in 
  all 
  probability 
  

   a 
  group 
  character. 
  

  

  cJ. 
  Head 
  much 
  broader 
  (3 
  : 
  2) 
  than 
  deep. 
  Eyes 
  widely 
  separated, 
  the 
  breadth 
  

   of 
  the 
  frons 
  being 
  nearly 
  equal 
  to 
  the 
  depth 
  of 
  the 
  head 
  from 
  the 
  anterior 
  ocellus 
  to 
  

   the 
  clypeal 
  edge. 
  The 
  latter 
  straight-edged, 
  with 
  two 
  minute 
  notches 
  medianly 
  

   set 
  apart 
  two-fifths 
  the 
  length 
  of 
  the 
  genal 
  keel. 
  Toruli 
  high 
  up, 
  their 
  upper 
  line 
  

   just 
  above 
  the 
  middle 
  of 
  the 
  face 
  and 
  nearer 
  (3 
  : 
  4) 
  the 
  orbits 
  than 
  to 
  one 
  another. 
  

   Eyes 
  bare, 
  prominent, 
  three-fifths 
  the 
  depth 
  of 
  the 
  head. 
  Surface 
  nearly 
  smooth 
  

   medianly 
  above 
  the 
  toruli, 
  the 
  rather 
  fine 
  pattern 
  becoming 
  more 
  marked 
  towards 
  

   the 
  orbits 
  and 
  genal 
  keel 
  or 
  suture. 
  Whole 
  face 
  remarkably 
  bare 
  ; 
  four 
  bristles 
  

   in 
  a 
  quadrangle 
  on 
  the 
  clypeus 
  and 
  a 
  minute 
  one 
  at 
  each 
  notch, 
  two 
  on 
  the 
  inner 
  

   side 
  of 
  the 
  genal 
  suture, 
  2-3 
  below 
  each 
  torulus, 
  and 
  4-6 
  along 
  each 
  orbit. 
  Antenna 
  

   07 
  mm. 
  (fig. 
  7, 
  a) 
  ; 
  scape 
  (10 
  : 
  3) 
  longer 
  (7 
  : 
  3) 
  than 
  the 
  pedicel 
  (3 
  : 
  2) 
  and 
  practically 
  

  

  Fig. 
  7. 
  Tetrastichus 
  radiatus, 
  sp. 
  n. 
  : 
  a, 
  antenna 
  of 
  £; 
  b, 
  antenna 
  of 
  £. 
  

  

  as 
  long 
  as 
  the 
  club, 
  the 
  spur 
  excepted 
  ; 
  sense-organ 
  short, 
  about 
  one-third 
  the 
  

   breadth. 
  On 
  each 
  of 
  the 
  first 
  four 
  normal 
  funicular 
  joints 
  and 
  on 
  the 
  first 
  segment 
  

   of 
  the 
  club 
  is 
  a 
  row 
  of 
  long 
  tubular 
  hairs, 
  as 
  follows, 
  10, 
  10, 
  8, 
  6, 
  5 
  ; 
  there 
  are 
  besides 
  

   one 
  sensorium 
  on 
  segments 
  one 
  and 
  the 
  first 
  of 
  the 
  club, 
  and 
  two 
  (exceptionally 
  

   three 
  on 
  the 
  second) 
  on 
  all 
  the 
  others. 
  Segments 
  of 
  funicle 
  and 
  club, 
  24, 
  33, 
  35, 
  35, 
  

   22, 
  22, 
  22, 
  and 
  spur 
  about 
  5 
  ; 
  the 
  breadth 
  decreases 
  from 
  24 
  (1) 
  to 
  18 
  (4) 
  and 
  15 
  on 
  the 
  

   club. 
  Labrum 
  simple, 
  transverse, 
  with 
  four 
  bristles 
  (2, 
  2) 
  ; 
  mandible 
  very 
  concave 
  

   ventrally, 
  teeth 
  deeply 
  separated, 
  the 
  upper 
  one 
  broad 
  ; 
  stipes 
  with 
  a 
  longish 
  bristle 
  

   at 
  side 
  near 
  palpus 
  and 
  another 
  minute 
  one 
  near 
  middle 
  ; 
  the 
  maxillary 
  palpus 
  

   two 
  and 
  a 
  half 
  times 
  the 
  labial 
  ; 
  galea 
  with 
  about 
  six 
  strongly 
  pustuled 
  bristles 
  and 
  

   some 
  twenty 
  more 
  on 
  the 
  upper 
  flap. 
  

  

  Thorax. 
  Pronotum 
  with 
  pattern 
  moderate, 
  little 
  raised 
  ; 
  besides 
  the 
  usual 
  bristle 
  

   above 
  the 
  spiracle, 
  there 
  are 
  on 
  each 
  side 
  of 
  mid 
  line 
  5-6 
  in 
  a 
  posterior 
  row 
  and 
  10-12 
  

   (minute) 
  more 
  irregularly 
  placed. 
  Mesonotum 
  with 
  four 
  short 
  stout 
  bristles 
  (2, 
  2) 
  

   close 
  to 
  the 
  parapsidal 
  furrows, 
  one 
  pair 
  at 
  one-fourth 
  and 
  the 
  other 
  at 
  three-fourths 
  

  

  