﻿258 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  from 
  the 
  eggs. 
  Some 
  recently 
  hatched 
  larvse 
  were 
  found 
  on 
  a 
  tree 
  July 
  

   30th, 
  and 
  were 
  successfully 
  reared 
  to 
  the 
  pupa 
  — 
  one 
  assuming 
  that 
  form 
  

   August 
  nth 
  and 
  others 
  a 
  few 
  days 
  later. 
  Young 
  larvae 
  taken 
  on 
  a 
  tree 
  

   September 
  9th, 
  pupated 
  October 
  7th. 
  The 
  eggs 
  and 
  larvae 
  of 
  this 
  insect 
  

   on 
  a 
  leaf 
  are 
  represented 
  in 
  figure 
  i 
  of 
  plate 
  VIII, 
  — 
  in 
  the 
  lower 
  left- 
  

   hand 
  corner 
  an 
  egg 
  cluster 
  is 
  shown 
  enlarged. 
  

  

  The 
  duration 
  of 
  the 
  egg 
  stage 
  in 
  July 
  averaged 
  about 
  5 
  days, 
  that 
  of 
  

   the 
  larva 
  15 
  to 
  20 
  days, 
  and 
  of 
  the 
  pupa 
  7 
  days. 
  In 
  the 
  autumn, 
  as 
  

   might 
  be 
  expected, 
  these 
  periods 
  are 
  considerably 
  prolonged 
  by 
  the 
  colder 
  

   weather. 
  In 
  September, 
  the 
  pupa 
  stage 
  was 
  observed 
  to 
  last 
  12 
  days, 
  

   and 
  in 
  October 
  twice 
  as 
  long. 
  

  

  The 
  duration 
  of 
  the 
  beetle's 
  existence 
  is 
  also 
  of 
  interest 
  since 
  it 
  has 
  a 
  

   bearing 
  on 
  the 
  probabihty 
  of 
  the 
  occurrence 
  of 
  a 
  third 
  brood. 
  A 
  record 
  

   of 
  the 
  mortality 
  of 
  those 
  confined 
  in 
  a 
  cage 
  July 
  6th 
  (see 
  above) 
  was 
  

   kept, 
  which 
  is 
  as 
  follows 
  : 
  7 
  dead 
  the 
  i6th; 
  4 
  the 
  i8th; 
  5 
  the 
  21st; 
  2 
  the 
  

   23rd; 
  15 
  the 
  25th. 
  Most 
  of 
  those 
  that 
  died 
  the 
  23rd 
  or 
  before 
  were 
  

   badly 
  affected 
  with 
  a 
  fungus, 
  Sporotrichuin 
  e7itojnophilum 
  Peck, 
  and 
  many 
  

   of 
  them 
  may 
  have 
  been 
  killed 
  by 
  it. 
  The 
  death 
  of 
  the 
  others 
  may 
  have 
  

   been 
  hastened 
  by 
  the 
  unnatural 
  conditions 
  of 
  confinement. 
  As 
  but 
  few 
  ot 
  

   the 
  beetles 
  died 
  before 
  most 
  of 
  the 
  eggs 
  had 
  been 
  laid, 
  it 
  is 
  probable 
  that 
  

   they 
  live 
  but 
  a 
  short 
  time 
  after 
  having 
  provided 
  for 
  the 
  perpetuity 
  of 
  the 
  

   species. 
  

  

  Although 
  eggs 
  and 
  larvas 
  were 
  not 
  obtained 
  from 
  individuals 
  known 
  to 
  

   belong 
  to 
  the 
  second 
  brood, 
  yet 
  the 
  rearing 
  to 
  the 
  pupa 
  and 
  imago 
  stages, 
  

   of 
  those 
  collected 
  abroad 
  as 
  cited 
  above, 
  show 
  conclusively 
  that 
  there 
  

   was 
  ample 
  time 
  for 
  three 
  generations 
  during 
  the 
  activity 
  of 
  the 
  insect. 
  

   The 
  beetles 
  were 
  seen 
  feeding 
  the 
  latter 
  part 
  of 
  August, 
  during 
  September, 
  

   and 
  even 
  into 
  October, 
  and 
  eggs, 
  or 
  evidences 
  of 
  recent 
  oviposition, 
  

   existed 
  throughout 
  the 
  time. 
  The 
  limited 
  life 
  of 
  the 
  beetles 
  after 
  ovi- 
  

   position 
  observed 
  in 
  July, 
  renders 
  it 
  most 
  probable 
  that 
  the 
  same 
  was 
  

   true 
  later 
  in 
  the 
  season. 
  From 
  the 
  preceding, 
  there 
  is 
  hardly 
  room 
  for 
  

   doubt 
  that 
  there 
  was 
  a 
  genuine 
  third 
  brood 
  of 
  the 
  insect 
  in 
  Albany 
  and 
  

   Troy 
  the 
  present 
  year. 
  

  

  Food-Habits 
  of 
  Larvae 
  and 
  Beetles. 
  

   Some 
  of 
  the 
  young 
  larvae 
  obtained 
  from 
  eggs 
  in 
  July 
  were 
  fed 
  with 
  the 
  

   greenest 
  of 
  the 
  old 
  leaves 
  that 
  could 
  be 
  obtained. 
  Everyone 
  of 
  several 
  

   lots 
  died 
  after 
  a 
  few 
  days, 
  and 
  then 
  it 
  seemed 
  as 
  if 
  they 
  were 
  unable 
  to 
  

   develop 
  upon 
  the 
  old 
  growth. 
  August 
  nth, 
  some 
  half 
  and 
  some 
  nearly 
  

   full 
  grown 
  larvse 
  were 
  placed 
  on 
  old 
  leaves. 
  They 
  at 
  once 
  began 
  feeding. 
  

  

  