﻿424 
  Dr. 
  H. 
  Eltringham 
  on 
  the 
  

  

  The 
  lobes 
  which 
  cover 
  the 
  eversible 
  tubercles 
  when 
  

   retracted 
  are 
  somewhat 
  of 
  the 
  shape 
  and 
  appearance 
  of 
  

   half 
  an 
  almond 
  shell, 
  but 
  much 
  thickened 
  towards 
  the 
  base. 
  

   Owing 
  to 
  the 
  pecuhar 
  angle 
  of 
  view 
  in 
  fig. 
  1 
  their 
  shape 
  

   is 
  not 
  well 
  shown. 
  On 
  the 
  outer 
  surface 
  of 
  the 
  lobes 
  the 
  

   chitin 
  is 
  perforated 
  by 
  a 
  multiphcity 
  of 
  openings, 
  and 
  in 
  

   ordinary 
  preserved 
  material 
  some 
  of 
  these 
  perforations 
  emit 
  

   cuticle 
  hairs 
  of 
  considerable 
  length, 
  whose 
  stalks 
  are 
  deeply 
  

   embedded 
  in 
  the 
  hypodermal 
  epithelimii 
  within. 
  This 
  

   epithehum 
  may 
  possibly 
  be 
  glandular, 
  since 
  it 
  presents 
  an 
  

   active 
  appearance 
  (fig. 
  5). 
  Mr. 
  Mosely 
  informs 
  me 
  that 
  the 
  

   lobes 
  in 
  this 
  and 
  some 
  other 
  species 
  are 
  densely 
  covered 
  

   with 
  these 
  cuticle 
  hairs 
  when 
  the 
  specimen 
  is 
  in 
  fresh 
  

   condition, 
  but 
  that 
  they 
  become 
  detached 
  with 
  great 
  

   facihty, 
  so 
  that 
  the 
  lobes, 
  even 
  in 
  life, 
  are 
  often 
  found 
  

   practically 
  naked. 
  We 
  may 
  therefore 
  assume 
  that 
  in 
  fresh 
  

   examples 
  each 
  perforation 
  carries 
  a 
  cuticle 
  hair. 
  We 
  may 
  

   further 
  venture 
  to 
  speculate 
  as 
  to 
  whether 
  when 
  detached 
  

   they 
  may 
  not 
  conceivably 
  act 
  in 
  a 
  manner 
  analogous 
  to 
  

   that 
  of 
  the 
  " 
  dust 
  particles 
  " 
  which 
  are 
  so 
  marked 
  a 
  feature 
  

   in 
  some 
  of 
  the 
  butterflies 
  already 
  referred 
  to, 
  and 
  of 
  which 
  

   the 
  use 
  has, 
  since 
  their 
  discovery, 
  been 
  actually 
  observed 
  

   and 
  recorded 
  by 
  Carpenter 
  (Proc. 
  Ent. 
  Soc, 
  1914, 
  p. 
  cxi). 
  

  

  Plate 
  XXII, 
  fig. 
  1 
  shows 
  the 
  head 
  of 
  this 
  species 
  with 
  the 
  

   lobes 
  turned 
  back 
  and 
  the 
  tubercles 
  in 
  a 
  condition 
  of 
  partial 
  

   eversion. 
  Fig. 
  2 
  shows 
  two 
  of 
  the 
  androconia 
  with 
  their 
  

   special 
  cells. 
  Fig. 
  3 
  a 
  highly 
  magnified 
  view 
  of 
  one 
  of 
  the 
  

   tubercles 
  partly 
  everted. 
  Fig. 
  4 
  a 
  section 
  through 
  one 
  of 
  

   the 
  lobes. 
  Fig. 
  5 
  part 
  of 
  the 
  same 
  more 
  highly 
  magnified 
  

   to 
  show 
  the 
  cells 
  hning 
  the 
  outer 
  cuticle. 
  Fig. 
  6 
  a 
  vertical 
  

   longitudinal 
  section 
  through 
  the 
  head 
  and 
  one 
  of 
  the 
  

   tubercles 
  incompletely 
  everted. 
  

  

  H. 
  simulans 
  Mosely. 
  

  

  Each 
  lobe 
  in 
  this 
  species 
  may 
  be 
  said 
  to 
  resemble 
  ex- 
  

   ternally 
  half 
  an 
  acorn. 
  The 
  basal 
  portion 
  is 
  thick 
  and 
  

   well 
  rounded, 
  and 
  shows 
  the 
  same 
  perforate 
  structure 
  as 
  

   in 
  H. 
  sparsa. 
  The 
  upper 
  part 
  is 
  smooth 
  and 
  rounded 
  and 
  of 
  

   a 
  somewhat 
  darker 
  colour, 
  whilst 
  the 
  apical 
  part 
  is 
  thin, 
  

   flat, 
  and 
  subtriangular. 
  On 
  its 
  inner 
  surface 
  each 
  lobe 
  

   has 
  a 
  deep 
  oval 
  concavity 
  forming 
  a 
  receptacle 
  for 
  the 
  

   retracted 
  brush. 
  No 
  sign 
  of 
  androconia 
  has 
  been 
  detected 
  

   in 
  this 
  species, 
  but 
  the 
  surface 
  of 
  the 
  concavity 
  of 
  the 
  lobe 
  

  

  