﻿AGDISTIDES. 
  131 
  

  

  1. 
  Larva 
  from 
  Chiclana 
  (feeding 
  on 
  Limoniastrum).— 
  This 
  possesses 
  two 
  great 
  

   mammillas 
  on 
  margin 
  of 
  prothoracic 
  plate, 
  a 
  third 
  smaller 
  colourless 
  one 
  below 
  (in 
  

   front 
  of 
  spiracle), 
  each 
  carrying 
  a 
  hair; 
  in 
  same 
  row 
  as 
  these 
  are 
  other 
  clubbed 
  

   hairs 
  similar 
  to 
  those 
  on 
  mammillae 
  (probably 
  primary, 
  as 
  secondary 
  hairs 
  are 
  else- 
  

   where 
  scarce 
  or 
  wanting) 
  ; 
  immediately 
  above 
  the 
  spiracle 
  is 
  a 
  small 
  boss 
  and 
  hair, 
  

   and 
  another 
  larger 
  one 
  at 
  base 
  of 
  leg, 
  this 
  has 
  a 
  constricted 
  neck, 
  reminding 
  one 
  of 
  

   the 
  dorsal 
  tubercles 
  of 
  Ernestia 
  lerensis. 
  The 
  mesothoracic 
  tubercle 
  i 
  is 
  large, 
  globular, 
  

   with 
  neck, 
  and 
  has 
  two 
  hairs 
  (one 
  front, 
  one 
  back); 
  ii 
  is 
  much 
  the 
  same, 
  but 
  

   smaller, 
  and 
  with 
  one 
  hair; 
  these 
  (i 
  and 
  ii) 
  are 
  placed 
  transversely 
  across 
  dorsum; 
  

   below 
  ii 
  but 
  quite 
  in 
  front 
  is 
  a 
  still 
  smaller 
  boss 
  (? 
  iii), 
  another 
  tubercle 
  ('? 
  iv) 
  

   without 
  boss, 
  between 
  this 
  and 
  one 
  at 
  base 
  of 
  leg 
  (vii) 
  which 
  is 
  smaller 
  than, 
  

   but 
  resembles, 
  that 
  on 
  prothorax. 
  On 
  metathorax 
  the 
  hairs 
  are 
  as 
  in 
  meso- 
  

   thorax, 
  but 
  on 
  the 
  flat 
  surface. 
  On 
  the 
  9th 
  abdominal 
  are 
  four 
  hairs 
  on 
  reversed 
  

   trapezoidal 
  bosses, 
  whilst 
  on 
  the 
  10th 
  are 
  two 
  comparatively 
  long 
  hairs 
  (perhaps 
  

   OTlmm.) 
  on 
  distinct 
  bosses 
  at 
  margin 
  of 
  anal 
  plate. 
  On 
  the 
  intermediate 
  segments 
  

   i 
  is 
  a 
  convex 
  shield 
  with 
  hair, 
  ii 
  is 
  a 
  little 
  farther 
  out 
  and 
  smaller, 
  iii 
  close 
  above 
  

   spiracle. 
  There 
  are 
  two 
  subspiraculars 
  at 
  same 
  level, 
  widely 
  apart, 
  one 
  (v) 
  as 
  far 
  

   in 
  front 
  as 
  the 
  other 
  (iv) 
  is 
  behind 
  spiracle 
  ; 
  a 
  lower 
  one 
  (vi) 
  is 
  placed 
  before 
  those 
  

   (vii) 
  at 
  base 
  of 
  prolegs 
  are 
  reached. 
  The 
  secondary 
  tubercles 
  take 
  the 
  form 
  of 
  

   white 
  (? 
  in 
  living 
  larva) 
  circular 
  or 
  oval 
  plates, 
  rather 
  numerous 
  about 
  spiracle, 
  and 
  

   especially 
  large 
  and 
  conspicuous 
  on 
  dorsum 
  in 
  front 
  of 
  i. 
  

  

  2. 
  Ernestia 
  lerensis. 
  — 
  In 
  this 
  larva, 
  horns 
  only 
  occur 
  on 
  thoracic 
  and 
  9th 
  

   abdominal 
  segments, 
  on 
  the 
  intermediate 
  segments 
  the 
  tubercles 
  are 
  developed 
  in 
  

   a 
  remarkable 
  way, 
  really, 
  no 
  doubt, 
  the 
  same 
  as 
  the 
  horns, 
  except 
  in 
  size. 
  The 
  

   prothorax 
  has 
  on 
  either 
  side 
  two 
  prominences 
  at 
  front 
  margin 
  of 
  plate 
  and 
  one 
  a 
  

   little 
  further 
  out, 
  one 
  larger 
  one 
  further 
  back, 
  and 
  another 
  outside 
  this, 
  just 
  above 
  

   spiracle 
  ; 
  each 
  of 
  them 
  carries 
  one 
  clubbed 
  hair. 
  On 
  the 
  mesothorax, 
  i 
  consists 
  of 
  

   two 
  conjoined 
  towers, 
  one 
  in 
  front 
  of 
  the 
  other, 
  whilst 
  ii, 
  rather 
  smaller, 
  is 
  further 
  

   out 
  ; 
  each 
  tower 
  carries 
  an 
  Indian 
  club-shaped 
  hair, 
  its 
  sides 
  are 
  rough, 
  and 
  

   studded 
  with 
  the 
  same 
  abundant 
  secondary 
  hairs 
  that 
  cover 
  the 
  whole 
  surface 
  in 
  a 
  

   scattered 
  way; 
  lower, 
  and 
  near 
  the 
  front 
  of 
  segment, 
  is 
  another 
  small 
  boss 
  (iii), 
  

   whilst 
  a 
  tubercle 
  (iv) 
  without 
  boss 
  is 
  at 
  front 
  margin 
  of 
  segment 
  lower 
  down 
  ; 
  vii, 
  

   with 
  boss, 
  is 
  a 
  little 
  way 
  above 
  leg. 
  On 
  the 
  metathorax, 
  i 
  is 
  as 
  on 
  mesothorax, 
  but 
  

   a 
  little 
  smaller, 
  ii 
  is 
  further 
  back 
  instead 
  of 
  nearly 
  outside 
  i, 
  iii 
  is 
  in 
  middle 
  of 
  

   segment 
  and 
  without 
  boss 
  (instead 
  of 
  at 
  front 
  margin 
  and 
  mounted) 
  ; 
  iv 
  and 
  vii 
  are 
  

   as 
  in 
  mesothorax. 
  On 
  the 
  9th 
  abdominal, 
  the 
  two 
  horns 
  are 
  well 
  apart, 
  and, 
  as 
  it 
  

   were, 
  on 
  a 
  transverse 
  ridge. 
  On 
  the 
  intermediate 
  segments, 
  i 
  and 
  ii 
  arc 
  wide 
  apart, 
  

   nearly 
  at 
  corners 
  of 
  square 
  (i.e., 
  only 
  slightly 
  trapezoidal), 
  not 
  very 
  large, 
  but 
  of 
  

   peculiar 
  construction, 
  e.g., 
  they 
  have 
  a 
  narrow 
  neck, 
  then 
  swell 
  out 
  wide 
  and 
  flat, 
  

   and 
  on 
  top 
  of 
  this 
  a 
  rough 
  thickened 
  structure, 
  with 
  a 
  hollow 
  on 
  summit 
  from 
  

   which 
  the 
  hair 
  arises. 
  (They 
  vary 
  a 
  little, 
  but 
  the 
  upper 
  surface 
  and 
  margins 
  are 
  

   always 
  rough, 
  with 
  fine 
  but 
  irregular 
  beading.) 
  Tubercle 
  iii 
  has 
  a 
  small 
  mammilla, 
  

   it 
  is 
  close 
  above, 
  and 
  a 
  little 
  in 
  front 
  of, 
  spiracle 
  ; 
  iv 
  is 
  well 
  below 
  the 
  spiracle 
  and 
  

   somewhat 
  behind 
  ii 
  ; 
  there 
  is 
  also 
  one 
  (vii) 
  at 
  base 
  of 
  proleg, 
  but 
  these 
  and 
  

   probably 
  others) 
  have 
  very 
  little 
  base, 
  and 
  carry 
  such 
  small 
  hairs 
  that 
  they 
  cannot 
  be 
  

   determined 
  on 
  some 
  segments, 
  and 
  others 
  are 
  lost. 
  The 
  general 
  surface 
  has 
  numerous 
  

   fine 
  transparent 
  secondary 
  hairs, 
  clubbed 
  (and 
  often 
  serrated) 
  like 
  the 
  primary 
  set», 
  

   and 
  only 
  differing 
  in 
  size. 
  

  

  3. 
  Agdistis 
  krankicnle 
  (from 
  Biskra). 
  — 
  [Appears 
  at 
  first 
  sight 
  very 
  cl 
  

   Ernestia 
  lerensis, 
  but 
  the 
  general 
  surface 
  is 
  smoother* 
  : 
  closer 
  examination, 
  however, 
  

   makes 
  it 
  really 
  much 
  closer 
  to 
  H 
  erbert'ui 
  tamaricis.'] 
  The 
  prothorax 
  has 
  a 
  posterior 
  pair 
  

   of 
  very 
  tall 
  pillars, 
  whilst 
  in 
  front 
  there 
  is, 
  on 
  each 
  side, 
  four 
  eminences 
  bordering 
  the 
  

   anterior 
  margin, 
  each 
  with 
  hair, 
  and 
  another 
  pillar 
  just 
  above 
  spiracle 
  ; 
  between 
  these 
  

   last 
  is 
  a 
  hair 
  without 
  base 
  ; 
  another 
  marginal 
  one 
  at 
  base 
  of 
  leg. 
  On 
  eaoh 
  side 
  of 
  the 
  

   mesothorax 
  is 
  a 
  double 
  pillar, 
  a 
  smaller 
  pillar 
  lower 
  and 
  forward, 
  and 
  two 
  lateral 
  tlat 
  

   tubercles, 
  one 
  at 
  the 
  middle 
  of 
  segment 
  and 
  the 
  other 
  at 
  base 
  of 
  leg. 
  On 
  the 
  

   metathorax 
  there 
  is 
  a 
  smaller 
  double 
  pillar 
  on 
  each 
  side, 
  of 
  which 
  the 
  front 
  element 
  

   is 
  the 
  lower; 
  a 
  posterior 
  shorter 
  pillar 
  further 
  out, 
  and 
  laterally, 
  three 
  tubercles 
  

   without 
  raised 
  bases, 
  the 
  first 
  median, 
  the 
  next 
  poster 
  or. 
  and 
  the 
  third 
  at 
  base 
  of 
  left. 
  

   On 
  all 
  the 
  abdominal 
  segments 
  the 
  dorsal 
  tubercles 
  are 
  like 
  those 
  on 
  the 
  2nd 
  and 
  5th 
  

   of 
  if 
  . 
  tamaricis, 
  the 
  anterior 
  a 
  short 
  pillar 
  slightly 
  bent 
  backwards, 
  the 
  posterior 
  a 
  

  

  * 
  The 
  larva 
  examined 
  is 
  much 
  oovered 
  with 
  some 
  powdery 
  substance, 
  which 
  

   seems 
  to 
  be 
  a 
  sort 
  of 
  natural 
  exudation 
  of 
  the 
  larva, 
  it 
  is 
  consequently 
  dil 
  

   he 
  sure 
  of 
  in 
  some 
  points 
  of 
  structure 
  (Chapman). 
  

  

  