﻿NO. 
  1138. 
  AMERICAN 
  TYrHLOCYBINAE— 
  GILLETTE. 
  761 
  

  

  Erythroneura 
  ritis 
  Fitch, 
  Horaop. 
  N. 
  Y. 
  St. 
  Cab., 
  p. 
  63, 
  1851; 
  rcpriut, 
  Lintiipr's9th 
  

   R<'p., 
  p. 
  403, 
  1893.— 
  Wai.sh, 
  Proc. 
  Bost. 
  Soc. 
  Nat. 
  Hist., 
  IX, 
  p. 
  317, 
  1864 
  ; 
  Pract. 
  

   Ent., 
  II, 
  p. 
  49, 
  1867.— 
  Glover, 
  Rep. 
  U.S. 
  Dep. 
  Agr.,p. 
  32, 
  1876.— 
  Saundehs, 
  

   Insects 
  Inj. 
  to 
  Fruit, 
  p. 
  286, 
  1883.— 
  Uhler, 
  Stand. 
  Nat. 
  Hist., 
  II, 
  p. 
  246, 
  1884.— 
  

   Provaxcher, 
  Pet. 
  Fanne 
  Ent. 
  Can.. 
  Ill, 
  p. 
  298, 
  1890. 
  — 
  Comstocic. 
  Manual 
  of 
  

   Ins., 
  p. 
  154. 
  1895. 
  

  

  Ttiphlociiha 
  rris 
  Walsh 
  A: 
  Kiley, 
  Aiuer. 
  Eul., 
  I, 
  p. 
  227, 
  1869. 
  — 
  Kilev, 
  Trans. 
  111. 
  

   St. 
  Hort. 
  Soc. 
  for 
  1873-74.— 
  Woodwohth. 
  Psyche, 
  V. 
  p. 
  213. 
  1889.— 
  Weed, 
  In- 
  

   sects 
  and 
  Insecticides, 
  p. 
  122, 
  1892. 
  — 
  Van 
  Dtzee, 
  Tians. 
  Am. 
  Ent. 
  Soc, 
  XXI, 
  

   p. 
  311. 
  1894. 
  

  

  The 
  original 
  description 
  of 
  tliis 
  vnrietj' 
  is 
  as 
  follows; 
  

  

  ()ne-tentli 
  of 
  an 
  inch 
  in 
  length. 
  Of 
  a 
  pale 
  yellow 
  or 
  straw 
  color; 
  there 
  aro 
  two 
  

   little 
  red 
  lines 
  on 
  the 
  head; 
  the 
  hack 
  part 
  of 
  the 
  thorax, 
  the 
  scntel, 
  the 
  base 
  of 
  the 
  

   wing 
  covt'rs, 
  and 
  a 
  hroad 
  hand 
  across 
  their 
  middle 
  are 
  scarlet: 
  the 
  tips 
  of 
  the 
  wing 
  

   covers 
  are 
  blackish 
  and 
  there 
  are 
  some 
  little 
  red 
  lines 
  between 
  the 
  broad 
  band 
  an<l 
  

   the 
  tips. 
  Tile 
  head 
  is 
  crescent 
  shaped 
  above 
  and 
  the 
  «'yelets 
  are 
  situated 
  just 
  below 
  

   the 
  ridge 
  of 
  the 
  front. 
  On 
  grape. 
  (See 
  Fig. 
  121.) 
  

  

  The 
  only 
  specimens 
  that 
  I 
  have 
  seen 
  of 
  this 
  variety 
  from 
  Colorado 
  I 
  

   took 
  in 
  Clear 
  Creek 
  Canyon, 
  near 
  Golden, 
  on 
  wild 
  grape, 
  July 
  18, 
  1 
  896. 
  

   J 
  have 
  received 
  specimens 
  from 
  Professor 
  Davis 
  taken 
  in 
  Michigan 
  and 
  

   from 
  Mr. 
  Hart 
  taken 
  in 
  Illinois, 
  

   and 
  in 
  both 
  instances 
  from 
  grape. 
  

   Spe('imens 
  from 
  Mr. 
  Pergande 
  were 
  

   taken 
  in 
  I>istrict 
  of 
  Columbia 
  on 
  

   ( 
  Vrc/.s 
  canadensis. 
  I 
  also 
  have 
  speci- 
  fig. 
  i21.-elvtkon' 
  of 
  i 
  yphuxyba 
  comes 
  var. 
  

   mens 
  taken 
  by 
  Mr. 
  E. 
  D. 
  Ball 
  and 
  ^'T'^ 
  

  

  V»y 
  myself 
  in 
  Iowa, 
  by 
  Mr. 
  Mac(Tillivray 
  in 
  New 
  York 
  and 
  Professor 
  

   Weed 
  in 
  Mississippi. 
  

  

  T^-pical 
  individuals 
  of 
  this 
  variety 
  are 
  so 
  different 
  in 
  their 
  markings 
  

   from 
  typical 
  comes 
  that 
  one 
  would 
  not 
  be 
  inclined 
  at 
  first 
  to 
  think 
  that 
  

   they 
  could 
  belong- 
  to 
  that 
  species, 
  but, 
  structurally, 
  the 
  two 
  forms 
  are 
  

   alike 
  and 
  one 
  can 
  go 
  from 
  one 
  extreme 
  to 
  the 
  other 
  through 
  ziczac, 
  which 
  

   seems 
  to 
  be 
  an 
  intermediate 
  form. 
  Specimens 
  from 
  Mr. 
  Hart's 
  private 
  

   collection 
  bear 
  the 
  numbers 
  345, 
  476, 
  5o5, 
  550, 
  562, 
  and 
  573. 
  

  

  Specimens 
  from 
  Professor 
  Davis 
  were 
  taken 
  from 
  wild 
  gra])e 
  and 
  the 
  

   si)ecimens 
  from 
  Mr. 
  Livingston 
  were 
  taken 
  on 
  alder. 
  I 
  do 
  not 
  know 
  

   the 
  host 
  plants 
  from 
  which 
  others 
  took 
  their 
  specimens. 
  

  

  VARIETY 
  ZICZAC 
  Walsh. 
  

  

  Erythroneura 
  ziczac 
  Wal.sh, 
  Proc. 
  Bost. 
  Soc. 
  Nat. 
  Hist., 
  IX, 
  p. 
  317. 
  1S64. 
  

   Typhhcyba 
  zh-zac 
  WoODWORTH, 
  Psyche, 
  V, 
  p. 
  312, 
  1889. 
  — 
  Vax 
  Duzke. 
  Trans. 
  

   Am. 
  Ent. 
  Soc, 
  XXI, 
  p. 
  312, 
  1894. 
  

  

  According 
  to 
  Mr. 
  Walsh 
  this 
  variety 
  has 
  the 
  following 
  characteristics: 
  

  

  Pale 
  yellowish. 
  Front 
  of 
  the 
  head 
  in 
  a 
  right 
  angle, 
  with 
  the 
  a]>ex 
  rcuinded. 
  

   Eyes 
  dusky; 
  ocelli 
  pale; 
  vertex 
  with 
  two 
  pale 
  sanguineous 
  vittte, 
  generally 
  sub- 
  

   obsolete. 
  Thorax 
  blood 
  brown, 
  yellowish 
  in 
  front, 
  often 
  with 
  a 
  yellowish 
  vitta, 
  

   scntel 
  blood-brown, 
  with 
  a 
  yellowish 
  vitta, 
  occasionally 
  entirely 
  yellowish. 
  Abdo- 
  

   men 
  often 
  blood-brown, 
  except 
  at 
  base 
  and 
  tip. 
  Tip 
  of 
  ovipositor 
  and 
  of 
  tarsi 
  dusky. 
  

   Elytra 
  pale 
  yellowish; 
  on 
  the 
  costal 
  tip 
  a 
  black 
  spot, 
  and 
  on 
  the 
  iuteiior 
  margin, 
  

  

  