﻿would 
  be 
  invisible 
  at 
  a 
  little 
  distance. 
  The 
  short 
  basal 
  joint, 
  

   also 
  dark, 
  is 
  followed 
  by 
  the 
  most 
  conspicuous 
  element. 
  This, 
  

   made 
  up 
  of 
  a 
  long 
  single 
  joint, 
  is 
  yellow 
  and 
  thus 
  resembles 
  

   the 
  antenna 
  of 
  many 
  of 
  the 
  large 
  Fossors, 
  although 
  the 
  like- 
  

   ness 
  is 
  here 
  brought 
  about 
  by 
  colour 
  alone, 
  and 
  not, 
  as 
  in 
  

   the 
  Locustid 
  described 
  in 
  Proc. 
  Ent. 
  Soc, 
  1913, 
  p. 
  lii, 
  by 
  a 
  

   change 
  of 
  form. 
  The 
  most 
  striking 
  feature 
  of 
  the 
  resemblance 
  

   is 
  provided 
  by 
  the 
  reddish 
  orange 
  brown 
  colour 
  of 
  the 
  wings 
  

   which, 
  seen 
  in 
  sharp 
  contrast 
  against 
  the 
  black 
  body, 
  are 
  

   wonderfully 
  like 
  those 
  of 
  several 
  well-known 
  Neotropical 
  

   Fossors. 
  There 
  could 
  be 
  no 
  doubt 
  that 
  the 
  movements 
  in 
  

   life 
  were 
  consistent 
  with 
  the 
  mimetic 
  resemblance 
  ; 
  for 
  Thomas 
  

   Belt 
  wrote 
  of 
  a 
  Nicaraguan 
  species 
  which 
  is 
  evidently 
  

   spinidorsis 
  (luteicornis 
  is 
  non-existent 
  in 
  the 
  genus, 
  but 
  

   lutescens, 
  Walk., 
  is 
  a 
  synonym 
  of 
  spinidorsis) 
  : 
  "I 
  one 
  day 
  

   observed 
  what 
  appeared 
  to 
  be 
  a 
  hornet, 
  with 
  brown 
  semi- 
  

   transparent 
  wings 
  and 
  yellow 
  antennae. 
  It 
  ran 
  along 
  the 
  

   ground 
  vibrating 
  its 
  wings 
  and 
  antennae 
  exactly 
  like 
  a 
  

   hornet, 
  and 
  I 
  caught 
  it 
  in 
  my 
  net, 
  believing 
  it 
  to 
  be 
  one. 
  

   On 
  examining 
  it, 
  however, 
  I 
  found 
  it 
  to 
  belong 
  to 
  a 
  widely 
  

   different 
  order. 
  It 
  was 
  one 
  of 
  the 
  Hemiptera, 
  Spiniger 
  

   luteicornis 
  (Walk.), 
  and 
  had 
  every 
  part 
  coloured 
  like 
  the 
  

   hornet 
  {Priocnemis) 
  that 
  it 
  resembled. 
  In 
  its 
  vibrating, 
  

   coloured 
  wing-cases 
  it 
  departed 
  greatly 
  from 
  the 
  normal 
  

   character 
  of 
  the 
  Hemiptera, 
  and 
  assumed 
  that 
  of 
  the 
  hornets." 
  

   See 
  " 
  Naturalist 
  in 
  Nicaragua," 
  2nd 
  Ed., 
  Lond., 
  p. 
  319, 
  also 
  

   the 
  illustrative 
  woodcut. 
  

  

  Dr. 
  Seitz 
  had 
  observed 
  the 
  mimetic 
  movements 
  in 
  the 
  

   Brazilian 
  species 
  Spiniger 
  ater, 
  Lep. 
  and 
  Serv. 
  (Proc. 
  Ent. 
  

   Soc, 
  1913, 
  p. 
  li), 
  and 
  had 
  also 
  published 
  a 
  description 
  of 
  similar 
  

   movements 
  in 
  probably 
  the 
  same 
  species 
  of 
  Reduviid 
  from 
  

   the 
  Corcovado, 
  which 
  " 
  exactly 
  resembles 
  one 
  of 
  the 
  dark 
  

   stinging-wasps 
  of 
  the 
  genus 
  Pepsis, 
  and 
  the 
  bug 
  makes 
  the 
  

   same 
  sort 
  of 
  movements 
  as 
  the 
  wasp 
  does, 
  though 
  these 
  are 
  

   of 
  a 
  kind 
  quite 
  different 
  from 
  those 
  of 
  ordinary 
  bugs." 
  (Ent. 
  

   Zeit. 
  Stettin, 
  li, 
  1890, 
  p. 
  281, 
  quoted 
  by 
  Dr. 
  David 
  Sharp 
  in 
  

   " 
  The 
  Cambridge 
  Natural 
  History," 
  Insecta, 
  II, 
  p. 
  558.) 
  

  

  Mr. 
  DuRRANT 
  observed 
  that 
  several 
  moths 
  have 
  been 
  

   recorded 
  as 
  being 
  found 
  on 
  sloths. 
  

  

  