﻿250 
  

  

  JAMES 
  WATERSTON. 
  

  

  Vertex 
  V-shaped, 
  the 
  sides 
  clothed 
  with 
  short 
  hairs 
  ; 
  frons 
  with 
  sharp 
  median 
  sulcus, 
  

   the 
  sides 
  contiguous 
  to 
  one-third 
  from 
  vertex, 
  widening 
  thence 
  to 
  scrobes, 
  V-shaped 
  

   in 
  transverse 
  section, 
  with 
  scattered 
  short 
  hairs 
  except 
  behind 
  the 
  scapes. 
  Clypeus 
  

   produced 
  in 
  a 
  rounded 
  median 
  projection, 
  between 
  which 
  and 
  the 
  scrobes 
  are 
  many 
  

   short, 
  stiff 
  hairs. 
  Antennae 
  (fig. 
  1) 
  11- 
  jointed, 
  set 
  at 
  less 
  than 
  one-fourth 
  from 
  mouth 
  

   edge 
  ; 
  scrobes 
  widely 
  apart, 
  narrow, 
  slanting 
  inwards 
  and 
  upwards, 
  face 
  triangularly 
  

   excavated 
  from 
  this 
  level 
  to 
  the 
  edge 
  of 
  the 
  clypeus 
  ; 
  scapes 
  large, 
  opposed 
  to 
  one 
  

  

  Fig. 
  1. 
  Agaon 
  fasciatum, 
  sp. 
  nov. 
  ; 
  a, 
  antenna 
  ; 
  b, 
  terminal 
  sense-organ. 
  

  

  another 
  along 
  their 
  much 
  flattened 
  triangular 
  faces, 
  with 
  (at 
  about 
  one-half) 
  a 
  strong 
  

   outwardly-directed 
  process, 
  which 
  bears 
  six 
  short 
  bristles 
  ; 
  second 
  joint 
  trans- 
  

   verse, 
  short, 
  with 
  six 
  bristles 
  ; 
  third 
  joint 
  flat 
  and 
  round 
  basally, 
  thereafter 
  drawn 
  

   out 
  apically 
  to 
  a 
  sharp 
  point, 
  with 
  one 
  short, 
  stout 
  bristle 
  ; 
  4th 
  joint 
  cylindrical, 
  

   short, 
  rising 
  from 
  a 
  depression 
  in 
  the 
  third 
  near 
  the 
  base, 
  having 
  3 
  short 
  bristles. 
  

   Joints 
  5-8 
  (of 
  which 
  5 
  and 
  6, 
  and 
  7 
  and 
  8 
  respectively, 
  are 
  subequal) 
  are 
  similarly 
  

   built 
  ; 
  each 
  bears 
  near 
  the 
  base 
  five 
  or 
  six 
  very 
  long 
  tubular 
  bristles 
  and 
  one 
  or 
  two 
  

   more 
  near 
  the 
  apex 
  ; 
  9 
  is 
  half 
  as 
  wide 
  again 
  as 
  8 
  and 
  bears 
  2 
  rows 
  of 
  the 
  long 
  bristles, 
  

   as 
  do 
  10 
  and 
  11 
  ; 
  it 
  is 
  apically 
  produced 
  into 
  a 
  neck 
  ; 
  10 
  is 
  produced 
  into 
  a 
  neck 
  

   in 
  both 
  directions 
  ; 
  the 
  11th 
  segment 
  bears^a 
  sense 
  organ 
  composed 
  of 
  about 
  ten 
  

   short 
  leaf-like 
  hairs. 
  

  

  Mouth-parts 
  (fig. 
  2, 
  a, 
  b). 
  — 
  Mandibles 
  powerful, 
  symmetrical, 
  with 
  4 
  teeth 
  on 
  

   inner 
  edge 
  ; 
  one 
  pair 
  (apical 
  and 
  sub-apical) 
  are 
  equal, 
  a 
  third 
  behind 
  them 
  

   shorter, 
  a 
  fourth 
  small, 
  with 
  sometimes 
  a 
  trace 
  of 
  another 
  behind. 
  Under 
  

   surface 
  of 
  the 
  mandible 
  with 
  over 
  a 
  dozen 
  sharp 
  ridges 
  ; 
  on 
  the 
  inner 
  

   superior 
  angle 
  there 
  is 
  a 
  strong 
  broadened 
  process 
  for 
  muscle 
  attachment. 
  

   Hinged 
  to 
  the 
  mandible, 
  but 
  not 
  interfering 
  with 
  its 
  mobility, 
  is 
  a 
  

   very 
  long, 
  backwardly 
  directed 
  and 
  apically 
  slightly 
  outcurved 
  rasping 
  blade, 
  

   reaching 
  to 
  the 
  occiput. 
  This 
  appendage 
  breaks 
  easily 
  from 
  the 
  mandible 
  ; 
  

  

  