﻿190 
  Thietieth 
  Repoet 
  on 
  the 
  State 
  Museum. 
  [78] 
  

  

  and 
  a 
  bright 
  yellow 
  substigmatal 
  one 
  indicated 
  by 
  obscure 
  

   yellowish 
  markings 
  at 
  the 
  incisures 
  ; 
  a 
  dark, 
  bluish-gray 
  

   transverse 
  line 
  on 
  the 
  side 
  of 
  each 
  segment 
  — 
  the 
  same 
  shade 
  

   surrounding 
  the 
  stigma 
  and 
  extending 
  to 
  the 
  proleg 
  ; 
  on 
  the 
  

   eleventh 
  segment 
  a 
  blackish 
  transverse 
  line 
  running 
  behind 
  

   the 
  stigma 
  upon 
  the 
  caudal 
  horn 
  — 
  the 
  latter 
  .09 
  inch 
  long, 
  

   glossy 
  black. 
  Caudal 
  shield 
  ferruginous, 
  rugose, 
  elevated 
  

   marginally 
  and 
  in 
  a 
  small 
  tubercle 
  centrally, 
  in 
  outline 
  a 
  broad 
  

   ellipse 
  having 
  a 
  lenticular 
  portion 
  excised 
  from 
  its 
  upper 
  

   fourth 
  ; 
  anal 
  plates 
  subtriangular, 
  and 
  of 
  a 
  similar 
  color 
  and 
  

   surface. 
  Stigmata 
  depressed, 
  elliptical, 
  surrounded 
  (except 
  

   the 
  first) 
  with 
  a 
  well 
  defined 
  white 
  ring 
  which 
  is 
  more 
  broadly 
  

   elliptical 
  than 
  the 
  stigma. 
  

   Entered 
  the 
  ground 
  for 
  its 
  pupation 
  on 
  Sept. 
  16th. 
  

  

  The 
  larvae 
  briefly 
  described 
  by 
  me 
  in 
  the 
  Proceedings 
  of 
  

   the 
  Entomological 
  Society 
  of 
  Philadelphia, 
  vol. 
  Ill, 
  p. 
  670, 
  

   were 
  in 
  all 
  probability 
  this 
  same 
  species. 
  Their 
  color 
  is 
  given 
  

   as 
  bluish-slate, 
  of 
  about 
  the 
  shade 
  of 
  the 
  branches 
  of 
  the 
  

   poplar, 
  on 
  which 
  they 
  were 
  feeding 
  (Pojpulus 
  nigra). 
  The 
  

   body 
  is 
  described 
  as 
  gradually 
  increasing 
  in 
  size 
  to 
  the 
  tenth 
  

   segment 
  ; 
  the 
  eleventh 
  segment 
  elevated 
  in 
  a 
  hump, 
  bearing 
  

   the 
  black 
  caudal 
  horn, 
  one-tenth 
  of 
  an 
  inch 
  long 
  ; 
  the 
  stig- 
  

   mata 
  broadly 
  oval, 
  black, 
  white 
  annulated. 
  It 
  is 
  probably 
  

   identical 
  with 
  the 
  form 
  occurring 
  in 
  Europe, 
  and 
  mentioned 
  

   as 
  a 
  variety 
  of 
  the 
  dictcea 
  larva. 
  

  

  All 
  my 
  efforts 
  to 
  obtain 
  the 
  imago 
  from 
  the 
  above 
  larvae, 
  

   have 
  resulted 
  in 
  failure. 
  Examples 
  of 
  the 
  larvae 
  collected 
  by 
  

   Mr. 
  von 
  Meske, 
  have 
  also 
  failed 
  to 
  give 
  the 
  imago 
  ; 
  after 
  

   having 
  safely 
  reached 
  the 
  pupal 
  state, 
  they 
  have 
  uniformly 
  

   died 
  while 
  in 
  that 
  stage. 
  A 
  figure 
  of 
  the 
  larva, 
  taken 
  from 
  a 
  

   drawing 
  made 
  by 
  me, 
  is 
  given 
  in 
  Glover' 
  s 
  Plates 
  of 
  Lepidopt- 
  

   era, 
  XCIX, 
  fig. 
  16. 
  

  

  No 
  examples 
  of 
  the 
  pupae, 
  unfortunately, 
  have 
  been 
  re- 
  

   tained, 
  and 
  I 
  am 
  only 
  able 
  to 
  recall 
  their 
  smooth 
  and 
  shining 
  

   surface, 
  and 
  the 
  tapering 
  form 
  of 
  'their 
  abdominal 
  segments 
  

   tipped 
  with 
  a 
  rather 
  long, 
  bifid 
  anal 
  spine. 
  

  

  Mr. 
  Graef, 
  of 
  Brooklyn, 
  has 
  succeeded 
  in 
  rearing 
  the 
  moth 
  

   from 
  larvae 
  collected 
  by 
  him, 
  and 
  to 
  him 
  I 
  owe 
  the 
  privilege 
  

   of 
  being 
  able 
  at 
  the 
  present 
  to 
  refer 
  descriptions 
  made 
  by 
  me 
  

   several 
  years 
  ago 
  of 
  larvae 
  which 
  have 
  meanwhile 
  proved 
  an 
  

  

  