﻿192 
  Thirtieth 
  Report 
  ox 
  the 
  State 
  Museum. 
  [80] 
  

  

  the 
  white 
  streak 
  with 
  which 
  it 
  is 
  marked, 
  shorter 
  and 
  nar- 
  

   rower 
  than 
  in 
  the 
  European, 
  and 
  entirely 
  wanting 
  from 
  the 
  

   middle 
  branch 
  [vein 
  3]. 
  These 
  are 
  the 
  only 
  differences 
  ob- 
  

   servable, 
  and 
  they 
  are 
  too 
  slight 
  to 
  afford 
  grounds 
  for 
  their 
  

   separation." 
  

  

  In 
  addition 
  to 
  the 
  two 
  examples 
  in 
  my 
  own 
  collection, 
  I 
  am 
  

   indebted 
  to 
  the 
  kindness 
  of 
  Mr. 
  von 
  Meske 
  for 
  the 
  opportu- 
  

   nity 
  of 
  comparing 
  two 
  examples 
  of 
  JV. 
  dictcea 
  from 
  Germany, 
  

   and 
  two 
  from 
  Racine, 
  Wis. 
  

  

  In 
  the 
  European, 
  the 
  white 
  stripe 
  which 
  traverses 
  the 
  

   brown 
  anal 
  patch 
  very 
  near 
  the 
  margin, 
  commences 
  in 
  cell 
  1, 
  

   within 
  the 
  internal 
  vein, 
  and 
  is 
  continued 
  until 
  near 
  or 
  just 
  

   beyond 
  vein 
  2. 
  In 
  the 
  American, 
  this 
  line 
  is 
  not 
  so 
  distinct, 
  

   and 
  in 
  an 
  ex-larva 
  example, 
  from 
  Albany, 
  it 
  is 
  obsolete, 
  being 
  

   represented 
  only 
  by 
  a 
  few 
  white 
  scales 
  ; 
  in 
  another 
  example, 
  

   it 
  commences 
  on 
  the 
  fold 
  and 
  continues 
  to 
  vein 
  3. 
  

  

  The 
  bent 
  white 
  cross-line 
  pointed 
  out 
  by 
  Dr. 
  Speyer 
  as 
  

   characterizing 
  the 
  American 
  form, 
  is 
  not 
  equally 
  well 
  marked 
  

   in 
  all. 
  In 
  the 
  Racine 
  specimens, 
  the 
  line 
  commences 
  on 
  the 
  

   internal 
  margin, 
  runs 
  for 
  a 
  short 
  distance 
  parallel 
  with 
  the 
  

   general 
  direction 
  of 
  the 
  outer 
  margin 
  of 
  the 
  wing 
  (not 
  of 
  the 
  

   anal 
  angle 
  portion), 
  and 
  curves 
  inward 
  toward, 
  and 
  is 
  lost 
  

   in, 
  the 
  submedian 
  fold. 
  An 
  exserted 
  portion 
  of 
  the 
  brown 
  

   patch 
  lies 
  inside 
  of 
  this 
  white 
  line 
  on 
  the 
  submedian 
  vein 
  

   (1 
  b). 
  In 
  the 
  Albany 
  example, 
  the 
  line 
  is 
  less 
  conspicuous, 
  

   and 
  the 
  brown 
  portion 
  inside 
  of 
  it 
  is 
  barely 
  indicated. 
  

  

  The 
  American 
  examples, 
  besides 
  having 
  the 
  brown 
  patch 
  

   larger, 
  have 
  also 
  the 
  brown 
  border 
  of 
  the 
  secondaries 
  heavier 
  

   than 
  the 
  European, 
  and 
  continued 
  to 
  the 
  apex. 
  

  

  The 
  comparison 
  of 
  Dr. 
  Speyer 
  of 
  the 
  length 
  of 
  the 
  white 
  

   lines 
  on 
  the 
  veins 
  of 
  the 
  primaries 
  is 
  not 
  sustained 
  by 
  the 
  ex- 
  

   amination 
  of 
  other 
  examples, 
  as 
  they 
  vary 
  in 
  length 
  and 
  dis- 
  

   tinctness. 
  In 
  one 
  before 
  me, 
  the 
  white 
  lines 
  are 
  of 
  the 
  same 
  

   length 
  on 
  veins 
  2 
  and 
  3 
  — 
  in 
  another, 
  shorter 
  on 
  3. 
  The 
  more 
  

   conspicuous 
  bifurcating 
  white 
  line 
  on 
  the 
  submedian 
  fold, 
  also 
  

   varies 
  in 
  length. 
  All 
  the 
  above 
  lines 
  also 
  vary 
  in 
  their 
  

   breadth 
  ; 
  those 
  on 
  veins 
  2 
  and 
  3 
  being 
  nearly 
  as 
  heavy 
  as 
  in 
  

   the 
  European, 
  while 
  in 
  the 
  Albany 
  example, 
  they 
  are 
  much 
  

   more 
  delicate. 
  

  

  In 
  the 
  other 
  markings 
  of 
  the 
  wings 
  I 
  find 
  no 
  differences 
  of 
  

   sufficient 
  constancy 
  to 
  aid 
  in 
  the 
  separation 
  of 
  the 
  forms 
  of 
  

   the 
  two 
  continents. 
  

  

  