﻿A 
  Migration 
  of 
  Yellow 
  Butterflies 
  in 
  Trinidad. 
  81 
  

  

  has 
  already 
  seen 
  it 
  migrating 
  (see 
  below). 
  Kaye 
  (I.e.) 
  gives 
  

   the 
  known 
  distribution 
  as 
  Guiana, 
  Brazil, 
  Peru, 
  Ecuador, 
  

   Columbia, 
  Panama, 
  St. 
  Lucia. 
  The 
  species 
  has 
  previously 
  

   been 
  recorded 
  as 
  migrating 
  in 
  Brazil 
  by 
  Goeldi 
  (first 
  printed 
  

   in 
  German 
  in 
  " 
  Die 
  Schweiz 
  "( 
  Zurich), 
  1900, 
  vol. 
  iv, 
  p. 
  441- 
  

   445, 
  reprinted 
  in 
  Portuguese 
  ( 
  ? 
  with 
  additions) 
  in 
  Boletin 
  

   do 
  Museu 
  Goeldi 
  (Para-Brazil), 
  iv, 
  Dec. 
  1904, 
  p. 
  309-316, 
  

   Fig. 
  I, 
  II), 
  and 
  also 
  by 
  Bates 
  and 
  Spruce 
  (quoted 
  in 
  above). 
  

   My 
  notes 
  below 
  are 
  taken 
  from 
  the 
  Portuguese 
  edition 
  of 
  

   Goeldi's 
  paper. 
  

  

  Catopsilia 
  statira 
  formed, 
  with 
  only 
  occasional 
  exceptions, 
  

   the 
  whole 
  of 
  the 
  migrating 
  bands 
  of 
  butterflies 
  on 
  the 
  

   present 
  migration. 
  At 
  Port 
  of 
  Spain, 
  on 
  the 
  27th 
  Sep- 
  

   tember, 
  I 
  noticed 
  that 
  about 
  1 
  in 
  100 
  or 
  less 
  were 
  a 
  smaller 
  

   whitish 
  species, 
  of 
  which, 
  however, 
  no 
  specimens 
  were 
  caught. 
  

   Near 
  Arima 
  (further 
  east) 
  on 
  the 
  same 
  day 
  J. 
  B. 
  Rorer 
  

   records 
  that 
  about 
  1 
  in 
  40 
  were 
  Callidryas 
  philea, 
  a 
  larger 
  

   orange 
  species. 
  On 
  the 
  24th 
  September 
  in 
  the 
  Caura 
  

   valley 
  in 
  the 
  northern 
  range 
  C. 
  M. 
  Roach 
  records 
  that 
  about 
  

   "1 
  in 
  40 
  were 
  a 
  larger 
  orange 
  species 
  " 
  (probably 
  also 
  

   Callidryas 
  philea). 
  At 
  Port 
  of 
  Spain 
  Mr. 
  T. 
  I. 
  Potter 
  

   caught 
  one 
  Callidryas 
  euhule 
  among 
  many 
  Catopsilia 
  

   statira, 
  but 
  it 
  is 
  possible 
  that 
  this 
  was 
  fluttering 
  round 
  

   flowers 
  and 
  not 
  taking 
  part 
  in 
  the 
  general 
  migration. 
  

  

  Origin 
  and 
  Destination 
  of 
  Flight. 
  

  

  Unless 
  the 
  butterflies 
  came 
  over 
  to 
  the 
  eastern 
  or 
  south- 
  

   eastern 
  coast 
  of 
  Trinidad 
  from 
  Venezuela 
  (a 
  possible 
  occur- 
  

   rence, 
  of 
  which, 
  however, 
  we 
  have 
  no 
  proof 
  owing 
  to 
  the 
  

   absence 
  of 
  records 
  from 
  this 
  coast), 
  it 
  seems 
  hkely 
  that 
  the 
  

   swarms 
  originated 
  in 
  the 
  forests 
  of 
  the 
  south-eastern 
  and 
  

   north-eastern 
  districts 
  of 
  the 
  Island. 
  

  

  It 
  wiU 
  be 
  noted 
  that 
  they 
  were 
  reported 
  as 
  abundant 
  in 
  

   the 
  south-eastern 
  district 
  as 
  early 
  as 
  the 
  end 
  of 
  August, 
  and 
  

   it 
  is 
  just 
  possible 
  that 
  the 
  flight 
  at 
  the 
  end 
  of 
  September 
  

   consisted 
  of 
  the 
  progeny 
  of 
  these. 
  I 
  have 
  no 
  data 
  for 
  the 
  

   life-history 
  of 
  Catopsilia 
  statira, 
  but 
  according 
  to 
  Mr. 
  W. 
  

   Buthn 
  Callidryas 
  euhule, 
  which 
  is 
  closely 
  related, 
  has 
  a 
  

   larval 
  stage 
  of 
  ten 
  days 
  and 
  a 
  pupal 
  stage 
  of 
  seven, 
  so 
  that 
  a 
  

   complete 
  cycle 
  could 
  no 
  doubt 
  be 
  passed 
  through 
  in 
  a 
  month. 
  

  

  A 
  shght 
  confirmation 
  of 
  this 
  is 
  that 
  the 
  specimens 
  cap- 
  

   tured 
  were 
  all 
  in 
  very 
  good 
  condition 
  as 
  if 
  comparatively 
  

   newly 
  emerged. 
  But 
  as 
  nothing 
  is 
  known 
  as 
  to 
  the 
  length 
  

   of 
  adult 
  hfe, 
  or 
  of 
  the 
  egg-stage, 
  or 
  of 
  the 
  time 
  taken 
  for 
  a 
  

  

  trans. 
  ENT. 
  SOC. 
  LOND. 
  1919. 
  — 
  parts 
  I, 
  II. 
  (JULY) 
  G 
  

  

  