﻿296 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  double 
  row 
  down 
  the 
  middle 
  of 
  the 
  back. 
  The 
  growing 
  young 
  become 
  

   darker 
  and 
  finally 
  assume 
  a 
  yellowish-red 
  color. 
  Each 
  segment 
  be- 
  

   -comes 
  covered 
  with 
  spiny 
  processes 
  secreting 
  wax. 
  The 
  general 
  form 
  

   of 
  the 
  young 
  larva 
  is 
  retained 
  (PI. 
  XIV, 
  fig. 
  4). 
  The 
  antenna 
  of 
  the 
  

   female 
  before 
  impregnation, 
  is 
  composed, 
  like 
  that 
  of 
  the 
  young, 
  of 
  six 
  

   segments, 
  the 
  second 
  and 
  third 
  being 
  the 
  longest 
  and 
  the 
  fourth 
  and 
  fifth 
  

   shortest. 
  The 
  antenna 
  of 
  the 
  immature 
  male 
  has 
  six 
  nearly 
  equal 
  seg- 
  

   ments 
  and 
  a 
  longer 
  seventh. 
  

  

  The 
  oval 
  cottony-like 
  cocoon 
  of 
  the 
  male 
  is 
  represented 
  in 
  figure 
  3, 
  

   of 
  Plate 
  XIV. 
  The 
  presence 
  of 
  the 
  insect 
  within 
  may 
  be 
  known 
  by 
  its 
  

   two 
  long 
  protruding 
  anal 
  filaments. 
  

  

  The 
  male 
  will 
  rarely 
  be 
  seen 
  by 
  most 
  observers. 
  It 
  is 
  a 
  delicate 
  two- 
  

   winged 
  creature 
  of 
  a 
  reddish 
  color, 
  with 
  rather 
  large 
  antennae 
  for 
  so 
  small 
  

   an 
  insect. 
  It 
  moves 
  slowly 
  over 
  the 
  limbs 
  with 
  a 
  clumsy 
  air. 
  It 
  is 
  not 
  

   easily 
  disturbed 
  and 
  rarely 
  takes 
  to 
  flight. 
  An 
  interesting 
  feature 
  is 
  

   the 
  occurrence 
  of 
  two 
  forms. 
  The 
  earlier 
  to 
  appear, 
  — 
  the 
  pseudimago, 
  — 
  

   is 
  characterized 
  chiefly 
  by 
  wing-pads 
  in 
  the 
  place 
  of 
  normally 
  developed 
  

   wings. 
  A 
  few 
  days 
  later 
  the 
  perfect 
  males 
  with 
  fully 
  expanded 
  wings 
  

   come 
  forth. 
  Although 
  the 
  pseudimago 
  is 
  incapable 
  of 
  flight, 
  it 
  can 
  

   probably 
  perpetuate 
  its 
  kind, 
  as 
  it 
  has 
  been 
  observed 
  in 
  coition. 
  

  

  Life-History. 
  

  

  This 
  insect 
  is 
  the 
  most 
  conspicuous 
  in 
  the 
  months 
  of 
  April, 
  May 
  and 
  

   June, 
  as 
  the 
  females 
  are 
  then 
  about 
  full-grown 
  and 
  are 
  preparing 
  to 
  give 
  

   birth 
  to 
  their 
  young. 
  Their 
  active 
  yellow 
  progeny 
  make 
  their 
  appear- 
  

   ance 
  in 
  the 
  latitude 
  of 
  Albany 
  early 
  in 
  July. 
  They 
  move 
  rapidly 
  over 
  

   the 
  bark 
  for 
  a 
  time 
  and 
  then 
  settle 
  along 
  the 
  veins 
  of 
  the 
  leaves, 
  princi- 
  

   pally 
  the 
  midvein, 
  and 
  in 
  large 
  numbers 
  on 
  the 
  greener 
  tips 
  of 
  the 
  twigs. 
  

   A 
  few 
  may 
  be 
  found 
  in 
  the 
  crevices 
  among 
  the 
  old 
  females. 
  They 
  remain 
  

   in 
  these 
  positions 
  until 
  mto 
  September 
  or 
  later, 
  when 
  many 
  desert 
  the 
  

   leaves 
  and 
  establish 
  themselves 
  on 
  the 
  bark 
  of 
  the 
  twigs 
  for 
  the 
  winter, 
  

   although 
  it 
  appears 
  that 
  numbers 
  do 
  not 
  take 
  this 
  precaution 
  in 
  time, 
  but 
  

   fall 
  with 
  the 
  leaves 
  and 
  are 
  scattered 
  by 
  the 
  winds. 
  Many 
  of 
  the 
  latter 
  

   must 
  perish, 
  although 
  a 
  few 
  may 
  live 
  to 
  estabhsh 
  colonies 
  in 
  new 
  localities. 
  

   The 
  winter 
  is 
  past 
  in 
  the 
  immature 
  form, 
  the 
  insects 
  being 
  about 
  two- 
  

   thirds 
  grown, 
  and 
  protected 
  by 
  a 
  whitish 
  excretion 
  from 
  the 
  numerous 
  

   processes 
  covering 
  the 
  dorsal 
  surface. 
  At 
  the 
  first 
  warm 
  weather 
  in 
  

   the 
  spring, 
  the 
  wintered 
  individuals 
  show 
  signs 
  of 
  activity. 
  Early 
  in 
  

   April 
  the 
  females 
  molt 
  for 
  the 
  last 
  time 
  and 
  the 
  males 
  form 
  their 
  

   cocoons. 
  At 
  this 
  time 
  many 
  travel 
  some 
  distance 
  before 
  selecting 
  a 
  suit- 
  

  

  