﻿754 
  

  

  REPORT 
  UNITED 
  STATES 
  GEOLOGICAL 
  SURVEY. 
  

  

  Fig, 
  26. 
  — 
  Painted 
  Matnestro. 
  a> 
  larva. 
  After 
  Riley. 
  

  

  Description, 
  — 
  I 
  have 
  observed 
  this 
  caterpillar 
  in 
  different 
  stages 
  at 
  Amherst, 
  Mass., 
  

   in 
  September, 
  1876, 
  when 
  it 
  was 
  ravaging 
  the 
  ruta-bagas. 
  In 
  the 
  young, 
  before 
  the 
  first 
  

   molt, 
  the 
  head 
  is 
  as 
  wide 
  as 
  the 
  body, 
  pale 
  greenish, 
  while 
  the 
  body 
  is 
  pale 
  greenish, 
  

  

  with 
  a 
  double, 
  dark, 
  livid, 
  dorsal 
  

   stripe 
  divided 
  by 
  a 
  pale 
  median 
  

   line 
  and 
  three 
  lateral 
  dark 
  stripes, 
  

   the 
  uppermost 
  of 
  which 
  is 
  the 
  nar- 
  

   rower 
  ; 
  five 
  pairs 
  of 
  abdominal 
  feet, 
  

   the 
  first 
  pair 
  one-half 
  as 
  large 
  as 
  

   the 
  fourth 
  pair. 
  The 
  body 
  is 
  tuber- 
  

   culated, 
  being 
  much 
  smoother 
  in 
  

   the 
  fully-grown 
  larva. 
  Length, 
  a 
  

   little 
  over 
  a 
  line. 
  After 
  the 
  first 
  

   molt, 
  when 
  the 
  worm 
  is 
  a 
  little 
  

   over 
  three 
  lines 
  in 
  length, 
  the 
  colors 
  

   are 
  much 
  as 
  in 
  the 
  fully-fed 
  larva, 
  

   being 
  deep 
  yellow, 
  with 
  a 
  broad, 
  

   black, 
  dorsal 
  band, 
  sometimes 
  

   entire 
  and 
  sometimes 
  divided 
  by 
  a 
  

   median 
  pale 
  line. 
  A 
  lateral 
  area 
  

   is 
  marbled 
  with 
  transverse, 
  short, 
  

   black 
  and 
  white 
  lines, 
  and 
  with 
  a 
  

   row 
  of 
  conspicuous 
  black 
  spots. 
  A 
  

   row 
  of 
  dark 
  spots 
  down 
  on 
  the 
  sides. 
  

   Head 
  reddish 
  testaceous 
  ; 
  abdomi- 
  

   nal 
  feet 
  reddish. 
  Jfter 
  the 
  third 
  

   molt, 
  when 
  the 
  caterpillar 
  is 
  one 
  inch 
  long 
  (observed 
  September 
  16,) 
  the 
  markings 
  

   are 
  nearly 
  the 
  same 
  as 
  the 
  mature 
  caterpillar. 
  The 
  fully-fed 
  larva 
  is 
  unusually 
  long, 
  

   cylindrical, 
  about 
  two 
  inches 
  in 
  length, 
  the 
  body 
  tapering 
  slightly 
  toward 
  the 
  head, 
  

   which 
  is 
  orange-red. 
  Abroad, 
  dorsal, 
  dark 
  line, 
  edged 
  with 
  yellow, 
  with 
  two 
  white 
  

   dots 
  in 
  the 
  middle 
  of 
  each 
  ring. 
  A 
  broad, 
  lateral, 
  white 
  band, 
  traversed 
  by 
  rune- 
  

   like 
  black 
  lines, 
  inclosing 
  a 
  line 
  of 
  large 
  black 
  dots, 
  one 
  in 
  the 
  lower 
  edge 
  of 
  each 
  ring. 
  

   A 
  lateral 
  line 
  of 
  yellow, 
  below 
  which 
  is 
  a 
  marbled 
  line 
  of 
  white 
  and 
  black 
  dots. 
  Legs, 
  

   both 
  thoracic 
  and 
  abdominal, 
  and 
  under 
  side 
  of 
  the 
  body, 
  tinged 
  with 
  orang"". 
  The 
  

   moth 
  is 
  clear 
  reddish-brown, 
  with 
  a 
  purplish 
  tint, 
  on 
  the 
  head, 
  tliorax, 
  and 
  fore 
  wings, 
  

   while 
  the 
  hind 
  wings 
  are 
  whitish, 
  contrasting 
  strongly 
  with 
  the 
  rest 
  of 
  the 
  body. 
  The 
  

   hind 
  body, 
  or 
  abdomen, 
  is 
  dull 
  ash-gray. 
  Fore 
  wings 
  with 
  a 
  conspicuous, 
  light, 
  round 
  

   spot 
  in 
  tlie 
  middle 
  of 
  the 
  ring, 
  beyond 
  which 
  is 
  a 
  kidney-shaped 
  light 
  spot, 
  containing 
  

   a 
  dark 
  ring. 
  The 
  veins 
  are 
  darker 
  than 
  the 
  rest 
  of 
  the 
  wing, 
  and 
  firmly 
  spotted 
  with 
  

   light 
  scales. 
  It 
  expands 
  a 
  little 
  over 
  an 
  inch 
  and 
  a 
  half. 
  

  

  The 
  Cabbage-Plant 
  Louse, 
  Aphis 
  irassicce 
  Linn. 
  — 
  Sometimes 
  gathering 
  in 
  immense 
  

   numbers 
  on 
  the 
  outer 
  leaves 
  ; 
  a 
  woolly, 
  greenish 
  louse, 
  the 
  winged 
  ones 
  spotted 
  with 
  

   black, 
  disfiguring 
  the 
  heads. 
  

  

  This 
  insect 
  is 
  called 
  by 
  Curtis, 
  in 
  his 
  " 
  Farm 
  Insects," 
  the 
  cabbage 
  and 
  

   Swedish 
  turnip-leaf 
  plant 
  louse; 
  the 
  species 
  that 
  I 
  have 
  observed 
  in 
  

   Maine 
  and 
  Massachusetts 
  is 
  without 
  much 
  doubt 
  the 
  same 
  as 
  the 
  Euro- 
  

   pean. 
  

  

  It 
  has 
  not 
  yet 
  been 
  kno.wn 
  to 
  be 
  specially 
  injurious 
  in 
  the 
  New 
  England 
  

   S.tates, 
  though 
  liable 
  at 
  any 
  year 
  to 
  be 
  so. 
  In 
  New 
  York, 
  however, 
  in 
  

   one 
  case 
  it 
  has 
  proved 
  very 
  destructive, 
  as 
  in 
  the 
  following 
  case 
  cited 
  

   by 
  Dr. 
  Fitch 
  : 
  " 
  J. 
  L. 
  Edgerton, 
  of 
  Waverly, 
  N. 
  Y., 
  states 
  (Country 
  

   Gentleman, 
  July, 
  1857, 
  p. 
  80) 
  that 
  his 
  patch 
  of 
  cabbages 
  the 
  year 
  before, 
  

   comprising 
  three 
  hundred 
  and 
  fifty 
  large, 
  thrifty 
  plants, 
  were 
  attacked 
  by 
  

   lice 
  j 
  ust 
  as 
  they 
  were 
  beginnin 
  g 
  to 
  head, 
  and 
  in 
  three 
  weeks 
  every 
  plant 
  was 
  

   covered 
  by 
  these 
  vermin 
  and 
  he 
  lost 
  the 
  whole, 
  neither 
  ashes 
  nor 
  salt 
  hav- 
  

   ing 
  any 
  effect 
  upon 
  them." 
  From 
  July, 
  says 
  Fitch, 
  to 
  the 
  close 
  of 
  the 
  

   season 
  it 
  may 
  be 
  found 
  on 
  the 
  plants, 
  either 
  solitary 
  or 
  in 
  clusters, 
  inhab- 
  

   iting 
  for 
  the 
  most 
  part 
  the 
  upper 
  sides 
  of 
  the 
  inner 
  leaves 
  and 
  the 
  under 
  

   sides 
  of 
  the 
  outer 
  ones. 
  It 
  is 
  in 
  the 
  former 
  case 
  that 
  it 
  is 
  most 
  pernicious 
  

   by 
  sucking 
  the 
  juices 
  from 
  and 
  weakening 
  this 
  part, 
  whereby 
  it 
  heads 
  tar- 
  

   dily 
  and 
  imperfectly, 
  or, 
  if 
  thel 
  ice 
  are 
  numerous, 
  no 
  head 
  is 
  formed 
  and 
  

   the 
  plant 
  is 
  worthless. 
  The 
  ruta-baga, 
  ©r 
  Swedish 
  turnip, 
  is 
  also 
  in 
  

   this 
  country, 
  says 
  Dr. 
  Fitch, 
  subject 
  to 
  its 
  attacks, 
  " 
  the 
  under 
  side 
  of 
  the 
  

  

  