﻿On 
  Cocoons 
  of 
  the 
  Genus 
  Trichostibas. 
  237 
  

  

  in 
  Perdita 
  the 
  maxillary 
  blade 
  far 
  exceeds 
  the 
  palpus, 
  while 
  

   the 
  reverse 
  is 
  true 
  iu 
  Nomioides. 
  If 
  Perdita 
  is 
  related 
  to 
  

   Nomioides, 
  as 
  suggested, 
  we 
  have 
  a 
  remarkable 
  illustration 
  

   of 
  the 
  persistence 
  of 
  colour-patterns 
  in 
  the 
  face 
  of 
  great 
  

   structural 
  changes 
  ; 
  and 
  as 
  the 
  different 
  colour-types 
  of 
  

   Nomioides 
  can 
  hardly 
  have 
  given 
  rise 
  separately 
  to 
  similar 
  

   types 
  of 
  Perdita, 
  we 
  have 
  also 
  an 
  illustration 
  of 
  kaleidoscopic 
  

   variation, 
  the 
  characters 
  combining 
  in 
  various 
  ways 
  and 
  

   sorting 
  out 
  again, 
  no 
  doubt 
  according 
  to 
  Mendelian 
  principles. 
  

   A 
  strong 
  argument 
  against 
  the 
  suggested 
  relationship 
  may 
  

   be 
  based 
  on 
  the 
  facial 
  fovese 
  of 
  Perdita 
  — 
  certainly 
  an 
  

   Andrenoid 
  character. 
  

  

  XXVII. 
  — 
  Notes 
  on 
  the 
  Cocoons 
  and 
  Descriptions 
  of 
  Four 
  new 
  

   Species 
  of 
  the 
  Genus 
  Trichostibas. 
  By 
  Embeik 
  Stkand, 
  

   ofc" 
  the 
  Royal 
  Berlin 
  Zoological 
  Museum. 
  

  

  In 
  his 
  interesting 
  paper 
  on 
  the 
  genus 
  Trichostibas 
  (Proc. 
  

   U.S. 
  Nat. 
  Mus. 
  vol. 
  xxxviii. 
  no. 
  1765, 
  October 
  15, 
  1910) 
  

   Mr. 
  August 
  Busck 
  describes, 
  besides 
  new 
  species, 
  also 
  the 
  

   cocoons, 
  referring 
  to 
  the 
  previous 
  accounts 
  of 
  these. 
  I 
  

   should, 
  however, 
  like 
  to 
  point 
  out 
  that 
  more 
  and 
  older 
  

   accounts 
  of 
  these 
  cocoons 
  exist 
  in 
  the 
  literature, 
  viz., 
  in 
  

   Bates, 
  '' 
  Naturalist 
  on 
  the 
  Amazons,' 
  and 
  in 
  Blanchard, 
  

   ' 
  Metamorphoses, 
  Mceurs 
  et 
  Instinctes 
  des 
  Insectes/ 
  2 
  e 
  edit. 
  

   1877. 
  Bates 
  figures 
  and 
  describes 
  (I. 
  c. 
  p. 
  379 
  of 
  the 
  

   German 
  edition 
  : 
  Leipzig, 
  Dyk'sche 
  Buchhandlung, 
  1866) 
  

   the 
  cocoon 
  and 
  gives 
  also 
  a 
  most 
  interesting 
  account 
  of 
  the 
  

   manner 
  in 
  which 
  the 
  larva 
  manages 
  to 
  construct 
  the 
  net- 
  

   work 
  of 
  the 
  cocoon. 
  Bates 
  gives 
  his 
  insect 
  no 
  name, 
  but 
  

   regards 
  it 
  as 
  belonging 
  to 
  the 
  Lithosiida 
  1 
  , 
  which 
  is 
  easily 
  

   explained 
  through 
  the 
  great 
  similitude 
  of 
  the 
  moths 
  of 
  the 
  

   genus 
  Trichostibas 
  to 
  the 
  Lithosiidse 
  ; 
  owing 
  to 
  this 
  simili- 
  

   tude, 
  Walsingham 
  points 
  out 
  (Proc. 
  Zool. 
  Soc. 
  London, 
  18i»7, 
  

   p. 
  115) 
  that 
  if 
  Walker 
  described 
  the 
  specimens 
  of 
  Tricho- 
  

   stibas 
  fumosa 
  Z., 
  which 
  probably 
  are 
  in 
  the 
  British 
  Museum, 
  

   " 
  he 
  would 
  be 
  most 
  likely 
  to 
  locate 
  the 
  species 
  in 
  the 
  Litho- 
  

   siadse." 
  Blanchard 
  gives 
  (I. 
  c. 
  p. 
  298) 
  a 
  figure 
  of 
  the 
  cocoon, 
  

   which 
  he 
  ascribes 
  to 
  an 
  " 
  Alucita 
  du 
  Biesil." 
  

  

  In 
  the 
  Royal 
  Berlin 
  Zoological 
  Museum 
  are 
  several 
  cocoons 
  

   of 
  this 
  kind, 
  most 
  of 
  them 
  belonging 
  to 
  the 
  former 
  Staudinger 
  

   Collection, 
  now 
  in 
  the 
  possession 
  of 
  the 
  Museum. 
  A 
  few 
  

   remarks 
  on 
  these 
  may 
  not 
  be 
  without 
  interest, 
  as 
  they 
  differ 
  

  

  