﻿86 
  Mr. 
  C. 
  B. 
  Williams 
  m 
  

  

  More 
  usual 
  than 
  this 
  was 
  an 
  open 
  order 
  in 
  which 
  the 
  

   butterflies 
  hurried 
  past, 
  each 
  individual 
  more 
  or 
  less 
  equally- 
  

   separated 
  from 
  its 
  neighbours, 
  some 
  close 
  to 
  the 
  ground, 
  

   some 
  as 
  high 
  as 
  twenty 
  feet, 
  but 
  by 
  far 
  the 
  greater 
  number 
  

   at 
  from 
  4 
  to 
  10 
  feet 
  from 
  the 
  ground 
  or 
  other 
  surface 
  (sea, 
  

   or 
  tree-tops) 
  over 
  which 
  they 
  were 
  flying. 
  

  

  The 
  flight 
  was 
  almost 
  always 
  in 
  bright 
  sunshine, 
  and 
  

   whenever 
  a 
  cloud 
  passed 
  over 
  the 
  sun 
  there 
  was 
  an 
  immedi- 
  

   ate 
  drop 
  in 
  the 
  numbers 
  passing. 
  As 
  the 
  butterflies 
  were 
  

   not 
  flying 
  at 
  the 
  same 
  speed 
  as 
  the 
  cloud 
  shadows, 
  flying 
  

   faster 
  than 
  the 
  wind 
  when 
  with 
  it, 
  and 
  often 
  across 
  it 
  or 
  

   against 
  it, 
  it 
  is 
  difficult 
  to 
  understand 
  the 
  rapid 
  reduction. 
  

   The 
  same 
  effect 
  was 
  noticed 
  in 
  the 
  case 
  of 
  Callidryas 
  eiibide 
  

   in 
  British 
  Guiana. 
  

  

  It 
  is 
  possible 
  that 
  in 
  the 
  absence 
  of 
  the 
  sun 
  the 
  individuals 
  

   fly 
  more 
  slowly 
  or 
  flutter 
  round 
  waiting 
  for 
  the 
  sun 
  to 
  

   reappear, 
  so 
  that 
  fewer 
  would 
  cross 
  a 
  given 
  line 
  in 
  the 
  same 
  

   time. 
  If 
  this 
  were 
  so, 
  there 
  should 
  be 
  a 
  rush 
  of 
  those 
  indi- 
  

   viduals 
  held 
  up, 
  on 
  the 
  return 
  of 
  the 
  sun. 
  No 
  detailed 
  

   observations 
  were 
  made 
  on 
  this 
  point 
  at 
  the 
  time, 
  but 
  I 
  do 
  

   not 
  recollect 
  any 
  effect 
  of 
  this 
  type. 
  

  

  Food-Plants. 
  

  

  The 
  food-plant 
  of 
  Catopsilia 
  statira 
  is 
  not 
  definitely 
  

   known 
  in 
  Trinidad. 
  It 
  is 
  almost 
  certainly 
  some 
  forest 
  

   leguminous 
  tree, 
  and 
  W. 
  Potter 
  says 
  that 
  he 
  believes 
  it 
  to 
  

   be 
  a 
  species 
  of 
  Cassia 
  or 
  Mimosa. 
  Goeldi 
  {I.e., 
  p. 
  315) 
  

   describes 
  a 
  forest 
  tree, 
  Voua'pa 
  acaciaefolia, 
  Baillon, 
  or 
  

   Macrolobium 
  acaciaefolium, 
  Bentham, 
  as 
  a 
  possible 
  food- 
  

   plant 
  in 
  Brazil, 
  as 
  he 
  had 
  observed 
  numerous 
  butterflies 
  

   leaving 
  the 
  general 
  migration 
  and 
  fluttering 
  round 
  this 
  

   tree 
  (see 
  below). 
  

  

  While 
  on 
  migration 
  the 
  majority 
  of 
  the 
  butterflies 
  do 
  

   not 
  stop 
  to 
  visit 
  flowers 
  which 
  they 
  pass 
  on 
  the 
  way, 
  but 
  

   occasional 
  individuals 
  (mostly 
  females) 
  may 
  do 
  so, 
  and 
  

   between 
  the 
  movements 
  they 
  are 
  abundant 
  flying 
  round 
  the 
  

   flowers 
  of 
  Hibiscus, 
  Pommearack 
  {Eugenia 
  malaccensis), 
  

   Eupatorium 
  odoratum, 
  Black 
  sage 
  {Lantana 
  sp.), 
  Guimauve 
  

   or 
  Wild 
  Ochroe 
  {Malacra 
  capitata), 
  and 
  many 
  others. 
  

  

  Resting 
  in 
  Patches 
  on 
  the 
  Geound. 
  

  

  As 
  in 
  many 
  previously 
  recorded 
  migrations 
  the 
  adult 
  

   butterflies, 
  when 
  not 
  migrating, 
  were 
  frequently 
  found 
  

  

  