﻿CANKER 
  WORMS 
  : 
  TWO 
  DISTINCT 
  SPECIES. 
  

  

  159 
  

  

  altered 
  from 
  those 
  originally 
  drawn 
  up 
  by 
  Mr. 
  Mann, 
  to 
  whom 
  we 
  were 
  

   under 
  obligations 
  for 
  specimens 
  of 
  pometaria 
  in 
  all 
  stages, 
  and 
  for 
  the 
  

   use 
  of 
  his 
  notes. 
  

  

  Further 
  investigations, 
  during 
  1875^ 
  enabled 
  us 
  to 
  complete 
  still 
  more 
  

   fully 
  the 
  comparisons 
  previously 
  instituted, 
  and 
  showed 
  that 
  the 
  struc- 
  

   tural 
  differences 
  were 
  greater 
  than 
  we 
  had 
  at 
  first 
  supposed, 
  in 
  conse- 
  

   quence 
  of 
  which 
  we 
  were 
  led 
  to 
  separate 
  the 
  insects 
  generically 
  in 
  a 
  

   paper, 
  read 
  October 
  14,'' 
  1875, 
  before 
  the 
  Academy 
  of 
  Science 
  of 
  Saint 
  

   Louis, 
  erecting 
  the 
  new 
  genus, 
  Faleacrita, 
  for 
  vernataj 
  and 
  i^iiimmg 
  pome- 
  

   taria 
  in 
  the 
  genus 
  Anisopteryx^ 
  to 
  which 
  it 
  alone 
  of 
  the 
  two 
  species 
  can 
  

   be 
  referred. 
  The 
  following 
  table 
  of 
  differences 
  is 
  tal^en 
  from 
  a 
  reprint 
  

   of 
  the 
  above-mentioned 
  paper, 
  which 
  appeared 
  in 
  our 
  Eighth 
  Missouri 
  

   Keport, 
  with 
  only 
  such 
  changes 
  as 
  are 
  necessitated 
  by 
  the 
  proper 
  ref- 
  

   erences 
  to 
  the 
  figures 
  and 
  by 
  subsequent 
  observations. 
  

  

  Anisopteryx 
  pometaria. 
  

  

  Paleaoriia 
  vernata. 
  

  

  EGG. 
  

  

  Elliptic-ovoid, 
  the 
  shell 
  of 
  delicate 
  tex- 
  Squarely 
  docked 
  at 
  top, 
  with 
  a 
  central 
  

  

  ture 
  aud 
  quite 
  yielding; 
  generally 
  ap- 
  puncture 
  and 
  a 
  brown 
  circle 
  near 
  the 
  hor- 
  

  

  pearing 
  shagreened 
  or 
  irregularly 
  im- 
  der 
  ; 
  of 
  firm 
  texture, 
  and 
  laid 
  side 
  by 
  side 
  

  

  pressed 
  ; 
  nacreous, 
  and 
  laid 
  in 
  irregular 
  in 
  regular 
  rows 
  and 
  compact 
  batches, 
  and 
  

  

  masses 
  in 
  secretedplaces. 
  (PL 
  III,Fig. 
  1,6.) 
  generally 
  exposed. 
  (PI. 
  Ill, 
  Fig. 
  5, 
  a, 
  h, 
  e.) 
  

  

  No 
  prolegs 
  on 
  joint 
  8. 
  (PL 
  III, 
  Fig. 
  1, 
  a. 
  ) 
  

  

  Head 
  distinctly 
  mottled 
  and 
  spotted, 
  

   the 
  top 
  pale, 
  and 
  two 
  pale 
  transverse 
  lines 
  

   in 
  front. 
  

  

  Body 
  with 
  eight 
  superior, 
  narrow, 
  pale, 
  

   longitudinal 
  lines 
  barely 
  discernible, 
  the 
  

   two 
  lowermost 
  much 
  farther 
  apart 
  than 
  

   the 
  others. 
  

  

  Dorsum 
  pale, 
  with 
  median 
  black 
  spots 
  ; 
  

   subdorsal 
  region 
  dark; 
  stigmatal 
  region 
  

   quite 
  pale. 
  

  

  Piliferous 
  spots 
  quite 
  visible 
  and 
  large 
  

   on 
  joint 
  11, 
  where 
  the 
  pale 
  lines 
  generally 
  

   enlarge 
  into 
  white 
  sj^ots 
  immediately 
  in 
  

   front 
  of 
  them. 
  

  

  When 
  newly 
  hatched 
  darJc 
  olive 
  -green 
  

   or 
  brown, 
  with 
  black 
  shiny 
  head 
  and 
  cer- 
  

   vical 
  shield. 
  

  

  With 
  a 
  pair 
  of 
  short 
  but 
  distinct 
  pro- 
  

   legs 
  on 
  joint 
  8. 
  (PL 
  III, 
  Fig. 
  5, 
  /. 
  ) 
  

  

  Head 
  very 
  indistinctly 
  spotted, 
  and 
  

   dark 
  on 
  top. 
  

  

  Only 
  six 
  superior, 
  broad, 
  and 
  very 
  dis- 
  

   tinct 
  pale 
  lines, 
  those 
  each 
  side 
  equidis- 
  

   tant. 
  

  

  Dorsum 
  dark, 
  without 
  ornament 
  ; 
  sub- 
  

   dorsal 
  region 
  pale, 
  stigmatal 
  region 
  dark. 
  

  

  Piliferous 
  spots 
  subobsolete. 
  

  

  When 
  uewly 
  hatched 
  pale 
  olive-green, 
  

   with 
  very 
  pale 
  head 
  and 
  cervical 
  shield. 
  

  

  CHRYSALIS. 
  

  

  Formed 
  in 
  a 
  simple 
  earthen 
  cell, 
  the 
  

   earth 
  compressed, 
  and 
  lined 
  with 
  very 
  

   few 
  silken 
  threads 
  so 
  as 
  to 
  form 
  a 
  fragile 
  

   cocoon, 
  which 
  easily 
  breaks 
  to 
  pieces. 
  

  

  Male 
  — 
  Sparsely 
  and 
  shallowly 
  pitted. 
  

   Pale 
  grayish-brown, 
  with 
  a 
  greenish 
  tint 
  

   on 
  the 
  wing-sheaths, 
  which 
  extend 
  to 
  the 
  

  

  Formed 
  in 
  a 
  perfect 
  cocoon 
  of 
  fine, 
  

   densely 
  spun 
  silk 
  of 
  a 
  bufi:^ 
  color, 
  inter- 
  

   woven 
  on 
  the 
  outside 
  with 
  j)articles 
  of 
  

   earth 
  ; 
  never 
  breaking 
  open 
  except 
  by 
  

   force 
  or 
  purpose. 
  

  

  Male 
  — 
  Punctation 
  very 
  faint, 
  more 
  or 
  

   less 
  obsolete. 
  Darker 
  brown 
  than 
  vernata 
  ; 
  

   the 
  wing 
  sheaths, 
  as 
  in 
  vernata, 
  reaching 
  

  

  