﻿496 
  Mr. 
  II. 
  Campion 
  on 
  some 
  

  

  eat 
  is 
  direct 
  observarion 
  in 
  the 
  field. 
  Fuitlier 
  information 
  

   could 
  probably 
  be 
  gained 
  by 
  the 
  examination 
  of 
  thu 
  contents 
  

   of 
  tlie 
  alimentary 
  canal 
  in 
  newly-caught 
  specimens. 
  Anotiier 
  

   mode 
  of 
  enquiry 
  has 
  been 
  suggested 
  by 
  Professor 
  H. 
  Maxwell 
  

   Lefroy, 
  who 
  has 
  written 
  on 
  Indian 
  Dragonflies 
  and 
  their 
  

   prey 
  (Journ. 
  Bombay 
  Soc. 
  xx. 
  pp. 
  236-2-^8, 
  1910). 
  He 
  

   says 
  : 
  "■ 
  In 
  the 
  field 
  one 
  sees 
  dragonfl.ies 
  sitting 
  on 
  a 
  con- 
  

   venient 
  plant 
  or 
  support 
  and 
  darting 
  off 
  every 
  now 
  and 
  then 
  

   on 
  the 
  ci 
  ase. 
  Below 
  such 
  a 
  point, 
  to 
  which 
  the 
  same 
  

   diagonflies 
  come 
  back 
  constantly, 
  one 
  'finds 
  their 
  excreta." 
  

   A, 
  study 
  of 
  these 
  excreta, 
  undertaken 
  by 
  tiie 
  same 
  author, 
  

   revealed 
  the 
  presence 
  of 
  remains 
  of 
  Orthoptera, 
  Aculeate 
  

   Hymenoptera, 
  Lepidoptera, 
  Coleo[)tera, 
  Diptera, 
  and 
  

   liliynchotii. 
  

  

  In 
  connection 
  with 
  the 
  study 
  of 
  predaceous 
  insects 
  gene- 
  

   rally, 
  Professor 
  E. 
  B. 
  Poulton 
  has 
  published 
  sixteen 
  illustra- 
  

   tions 
  of 
  the 
  kind 
  of 
  prey 
  selected 
  by 
  Dragonfiies 
  as 
  food 
  

   (Trans. 
  Ent. 
  Soc. 
  London, 
  1906, 
  pp. 
  398-401). 
  The 
  

   following 
  records 
  will 
  serve 
  to 
  supplement 
  those 
  illustrations, 
  

   and 
  they 
  are 
  here 
  presented 
  in 
  the 
  same 
  convenient 
  form. 
  

   The 
  captors 
  and 
  prey 
  from 
  Nyasalaud 
  and 
  British 
  East 
  Africa 
  

   cited 
  in 
  Table 
  I. 
  (pp. 
  498-501) 
  were 
  obtained 
  by 
  xMr. 
  S. 
  A. 
  

   Neave, 
  while 
  visiting 
  those 
  countries 
  on 
  behalf 
  of 
  the 
  Imperial 
  

   Bureau 
  of 
  Entomology. 
  I 
  am 
  indebted 
  to 
  Mr. 
  Guy 
  A. 
  K. 
  

   Marshall, 
  the 
  Director 
  of 
  the 
  Bureau, 
  for 
  his 
  kindness 
  in 
  

   allowing 
  me 
  to 
  study 
  this 
  material, 
  as 
  well 
  as 
  some 
  other 
  

   examples 
  of 
  a 
  similar 
  kind 
  sent 
  from 
  Uganda 
  by 
  Dr. 
  G. 
  D. 
  

   H. 
  Carpenter 
  (Sleeping 
  Sickness 
  Commission 
  of 
  the 
  Koyal 
  

   Society). 
  The 
  cases 
  collected 
  in 
  Essex 
  and 
  Surrey 
  by 
  my 
  

   brother 
  and 
  myself 
  have 
  been 
  already 
  published 
  in 
  our 
  

   annual 
  reports 
  upon 
  Biitish 
  Dragonflies, 
  but 
  they 
  are 
  now 
  

   brought 
  together 
  and 
  incorporated 
  with 
  the 
  original 
  records 
  

   from 
  Africa. 
  I 
  have 
  considered 
  it 
  advisable 
  to 
  separate 
  the 
  

   cases 
  of 
  cannibalism 
  — 
  if 
  this 
  term 
  can 
  be 
  rightly 
  employed 
  

   when 
  the 
  captor 
  and 
  prey 
  do 
  not 
  belong 
  to 
  one 
  and 
  the 
  same 
  

   species 
  — 
  fioai 
  the 
  instances 
  in 
  which 
  Diagonflies 
  have 
  sought 
  

   tiieir 
  food, 
  more 
  legitimately, 
  among 
  insects 
  of 
  other 
  orders. 
  

   My 
  reason 
  for 
  doing 
  so 
  is 
  that 
  cases 
  of: 
  this 
  description, 
  

   where 
  one 
  Dragonfly 
  hunts 
  another, 
  are 
  quite 
  as 
  germane 
  to 
  

   an 
  enquiiy 
  as 
  to 
  what 
  kind 
  of 
  animals 
  prey 
  upon 
  Dragonflies 
  

   as 
  they 
  are 
  to 
  the 
  matter 
  at 
  present 
  under 
  consideration. 
  

  

  The 
  whole 
  of 
  the 
  African 
  material 
  mentioned 
  '\\\ 
  the 
  

   following 
  Tables 
  has 
  been 
  presented 
  to 
  tlie 
  British 
  Museum 
  

   (Natural 
  History) 
  by 
  the 
  Imperial 
  Bureau 
  of 
  Entomology. 
  

  

  In 
  view 
  of 
  the 
  well-known 
  fact 
  that, 
  both 
  in 
  collections 
  

   and 
  in 
  the 
  field, 
  the 
  males 
  of 
  most 
  species 
  of 
  Dragonflies 
  are 
  

  

  