﻿THE 
  CHEERY 
  FRUIT 
  SAWFLY. 
  

  

  75 
  

  

  for 
  the 
  Bureau 
  of 
  Entomology, 
  kept 
  a 
  close 
  watch 
  for 
  the 
  first 
  appear- 
  

   ance 
  of 
  the 
  adults 
  of 
  this 
  species. 
  On 
  March 
  10, 
  1910, 
  he 
  found 
  three 
  

   female 
  sawfiies 
  (see 
  fig. 
  23, 
  d) 
  in 
  cages 
  planted 
  under 
  trees 
  in 
  the 
  

   orchard 
  and 
  used 
  for 
  the 
  emergence 
  records 
  of 
  the 
  pear 
  thrips. 
  

   Four 
  more 
  adults 
  were 
  caught 
  in 
  the 
  cages 
  on 
  March 
  12, 
  and 
  two 
  

   dead 
  ones 
  were 
  found 
  outside 
  of 
  the 
  cages. 
  These 
  had 
  evidently- 
  

   been 
  killed 
  by 
  the 
  spraying 
  for 
  thrips 
  the 
  previous 
  morning. 
  The 
  

   first 
  males 
  were 
  found 
  March 
  16 
  and 
  after 
  this 
  date 
  both 
  sexes 
  were 
  

   quite 
  numerous 
  for 
  some 
  two 
  weeks 
  or 
  more. 
  The 
  Black 
  Tartarian 
  

   cherries 
  were 
  just 
  beginning 
  to 
  bloom 
  at 
  this 
  time. 
  

  

  The 
  writer 
  spent 
  considerable 
  time 
  in 
  the 
  Suisun 
  section 
  at 
  this 
  

   period, 
  making 
  a 
  further 
  study 
  of 
  the 
  life 
  history 
  and 
  habits 
  of 
  the 
  

  

  Fig. 
  23.— 
  Stages 
  and 
  work 
  of 
  the 
  cherry 
  fruit 
  sawfly 
  (Hoplocampa 
  cooker): 
  a, 
  Egg; 
  b, 
  position 
  of 
  egg 
  in 
  

   cherry 
  blossom; 
  c, 
  larva; 
  d, 
  adult 
  sawfly; 
  e, 
  saw 
  of 
  ovipositor; 
  /, 
  serrations 
  on 
  ovipositor; 
  g, 
  sheath 
  of 
  

   saw; 
  h, 
  head 
  of 
  adult 
  sawfly; 
  i, 
  infested 
  cherries. 
  (Original.) 
  

  

  insect. 
  By 
  March 
  20 
  adults 
  of 
  both 
  sexes 
  were 
  plentiful, 
  but 
  the 
  

   females 
  far 
  outnumbered 
  the 
  males. 
  As 
  many 
  as 
  40 
  individuals 
  

   were 
  observed 
  in 
  one 
  tree, 
  two-thirds 
  to 
  three-fourths 
  of 
  which 
  were 
  

   females. 
  The 
  adults 
  were 
  very 
  sluggish 
  in 
  the 
  early 
  mornings 
  and 
  

   could 
  be 
  picked 
  up 
  with 
  little 
  or 
  no 
  difficulty. 
  Toward 
  noon, 
  as 
  the 
  

   atmosphere 
  grew 
  warmer, 
  they 
  became 
  more 
  active, 
  but 
  even 
  then 
  

   many 
  individuals 
  could 
  be 
  caught 
  in 
  the 
  trees. 
  The 
  adults 
  may 
  be 
  

   found 
  resting 
  on 
  the 
  leaves, 
  leaf 
  stems, 
  blossoms, 
  both 
  outside 
  and 
  

   inside, 
  and 
  on 
  the 
  twigs. 
  A 
  few 
  were 
  observed 
  feeding 
  on 
  the 
  nec<;ir 
  

   of 
  the 
  more 
  advanced 
  flowers. 
  In 
  confinement 
  the 
  adults 
  fed 
  quite 
  

   freely 
  upon 
  sirup 
  and 
  water. 
  

  

  