﻿— 
  15° 
  — 
  

  

  It 
  differs 
  from 
  the 
  army-worm 
  in 
  its 
  method 
  of 
  avoiding 
  the 
  con- 
  

   sequences 
  of 
  a 
  too 
  prolific 
  multiplication, 
  not 
  moving 
  off 
  in 
  definite 
  

   hordes 
  and 
  in 
  fixed 
  directions, 
  like 
  the 
  latter 
  insect, 
  but 
  spreading 
  

   indefinitely 
  in 
  all 
  directions 
  from 
  the 
  most 
  densely 
  populated 
  area. 
  

  

  It 
  ranges 
  over 
  the 
  whole 
  United 
  States 
  east 
  of 
  the 
  Rocky 
  Mountains, 
  

   and 
  it 
  is 
  also 
  found 
  in 
  Jamaica 
  and 
  Brazil. 
  There 
  are 
  at 
  least 
  two, 
  and 
  

   probably 
  three, 
  generations 
  of 
  the 
  species 
  in 
  each 
  year 
  in 
  the 
  latitude 
  

   of 
  central 
  Illinois, 
  one 
  becoming 
  destructive 
  in 
  the 
  larval 
  state 
  late 
  in 
  

   July 
  and 
  continuing 
  abundant 
  in 
  August, 
  and 
  another 
  appearing 
  in 
  Octo- 
  

   ber. 
  The 
  fall 
  brood 
  is 
  usually 
  the 
  destructive 
  one, 
  any 
  other 
  rarely 
  

   being 
  numerous 
  enough 
  to 
  attract 
  attention. 
  This 
  species 
  is 
  believed 
  

   to 
  hibernate 
  mainly 
  in 
  the 
  pupa 
  stage, 
  but 
  partly 
  also, 
  in 
  all 
  probability, 
  

   as 
  an 
  adult. 
  Thus, 
  larvse 
  collected 
  by 
  us 
  October 
  ii, 
  1884, 
  were 
  mostly- 
  

   alive 
  in 
  the 
  earth 
  as 
  pupae 
  in 
  December, 
  a 
  few 
  only 
  having 
  emerged 
  in 
  

   the 
  preceding 
  month. 
  

  

  It 
  is 
  held 
  in 
  check 
  mainly, 
  if 
  not 
  wholly, 
  by 
  its 
  parasites, 
  of 
  which 
  

   a 
  tachinid 
  fly 
  is 
  one 
  of 
  the 
  most 
  important. 
  

  

  The 
  Beet 
  Army-worm. 
  

   Laphygma 
  flaviitiaculatii 
  Harv. 
  

  

  This 
  caterpillar, 
  which 
  replaces 
  the 
  foregoing 
  in 
  the 
  Western 
  States, 
  

   differs 
  from 
  it 
  by 
  its 
  more 
  decidedly 
  mottled 
  ground-color, 
  by 
  a 
  row 
  of 
  

   white 
  dots 
  at 
  the 
  lower 
  margin 
  of 
  the 
  lateral 
  dark 
  band, 
  and 
  by 
  the 
  yel- 
  

   lower 
  color 
  of 
  the 
  light 
  stripes. 
  It 
  is 
  an 
  interesting 
  fact 
  that 
  while 
  the 
  

   preceding 
  species 
  was 
  doing 
  serious, 
  unusual, 
  and 
  very 
  wide-extended 
  

   injuries 
  in 
  the 
  Eastern 
  and 
  Southern 
  States, 
  the 
  present 
  one 
  was 
  simi- 
  

   larly 
  abundant 
  in 
  Colorado, 
  where 
  besides 
  destroying 
  many 
  kinds 
  of 
  

   weeds 
  and 
  grasses 
  it 
  completely 
  defoliated 
  thousands 
  of 
  acres 
  of 
  sugar 
  

   beets. 
  In 
  some 
  cases 
  where 
  the 
  foliage 
  of 
  the 
  beet 
  did 
  not 
  furnish 
  it 
  

   sufficient 
  food, 
  the 
  root 
  was 
  attacked 
  and 
  the 
  upper 
  surface 
  often 
  com- 
  

   pletely 
  gnawed 
  away. 
  Late 
  plantings 
  of 
  course 
  suffered 
  most 
  severely, 
  

   especially 
  when 
  surrounded 
  by 
  newly 
  broken 
  ground. 
  The 
  weeds 
  most 
  

   generally 
  eaten 
  were 
  pigweed, 
  saltweed, 
  wild 
  sunflower, 
  and 
  Cleome. 
  

   Potato, 
  pea, 
  and 
  apple 
  leaves 
  were 
  also 
  devoured. 
  . 
  These 
  injuries 
  

   occurred 
  about 
  the 
  middle 
  of 
  August, 
  at 
  which 
  time 
  larvae 
  and 
  pupae 
  

   were 
  abundant, 
  and 
  a 
  few 
  moths 
  laden 
  with 
  eggs 
  were 
  also 
  noticed. 
  

   These 
  facts 
  are 
  derived 
  from 
  the 
  statements 
  of 
  Prof. 
  C. 
  P. 
  Gillette, 
  of 
  

   the 
  Colorado 
  Experiment 
  Station, 
  who 
  furnished 
  the 
  material 
  for 
  this 
  

   account 
  together 
  with 
  specimens 
  of 
  the 
  insect. 
  

  

  This 
  species 
  evidently 
  hibernates 
  as 
  a 
  moth, 
  and 
  at 
  least 
  two 
  broods 
  

   of 
  larvae 
  may 
  be 
  looked 
  for 
  each 
  year, 
  the 
  first 
  about 
  June 
  and 
  the 
  sec- 
  

   ond 
  in 
  August. 
  The 
  species 
  has 
  been 
  reported 
  thus 
  far 
  from 
  Colorado 
  

   and 
  California, 
  but 
  it 
  doubtless 
  has 
  a 
  more 
  extended 
  range 
  in 
  the 
  moun- 
  

  

  