﻿46 
  

  

  DECIDUOUS 
  FRUIT 
  INSECTS 
  AND 
  INSECTICIDES. 
  

  

  the 
  larvae 
  of 
  the 
  grape-berry 
  moth, 
  but 
  be 
  failed 
  to 
  rear 
  the 
  adult 
  

   parasites 
  from 
  them. 
  

  

  During 
  his 
  studies 
  of 
  this 
  insect 
  covering 
  the 
  seasons 
  of 
  1903 
  and 
  

   1904, 
  Prof. 
  Slingerland 
  reared 
  six 
  different 
  kinds 
  of 
  parasites 
  of 
  the 
  

   grape-berry 
  moth, 
  which 
  he 
  considered 
  an 
  unusually 
  large 
  number. 
  

   Four 
  of 
  these 
  were 
  ichneumonids 
  and 
  two 
  were 
  braconids. 
  These 
  

   rearings 
  by 
  Prof. 
  Slingerland 
  are 
  quoted 
  as 
  follows: 
  1 
  

  

  Bracon 
  scrutator 
  Say. 
  (Boston 
  Journ. 
  Nat. 
  Hist., 
  I, 
  254). 
  The 
  maggot 
  of 
  this 
  little 
  

   Braconid 
  parasite 
  seems 
  to 
  feed 
  externally 
  on 
  the 
  nearly 
  full-grown 
  caterpillars 
  of 
  the 
  

   second 
  brood 
  at 
  work 
  in 
  the 
  green 
  fruit 
  in 
  August. 
  Their 
  little, 
  white 
  cocoons 
  are 
  

   spun 
  in 
  the 
  infested 
  berries. 
  The 
  adults 
  emerged 
  in 
  about 
  two 
  weeks 
  on 
  the 
  following 
  

   dates: 
  Aug. 
  28, 
  Sept. 
  1, 
  4, 
  and 
  10. 
  

  

  Bathymetis 
  sp. 
  near 
  terminalis 
  Ashm. 
  We 
  reared 
  two 
  females 
  of 
  this 
  comparatively 
  

   large 
  parasite 
  from 
  hibernated 
  pupae 
  on 
  May 
  31. 
  The 
  grape-berry 
  moth 
  caterpillar 
  

  

  Fig. 
  16, 
  

  

  • 
  Thymaris 
  slingerlandana, 
  a 
  common 
  parasite 
  of 
  the 
  grape-berry 
  moth. 
  Enlarged. 
  (After 
  Sling- 
  

   erland.) 
  

  

  had 
  pupated 
  and 
  the 
  parasite's 
  cocoon 
  rilled 
  that 
  of 
  its 
  host. 
  Dr. 
  Ashmead 
  reports 
  our 
  

   specimens 
  as 
  probably 
  undescribed, 
  but 
  possibly 
  terminalis, 
  which 
  was 
  described 
  

   from 
  a 
  male 
  only. 
  

  

  Glypta 
  animosa 
  Cress. 
  (Trans. 
  Am. 
  Ent. 
  Soc, 
  III, 
  154). 
  One 
  specimen 
  of 
  this 
  

   Ichneumon 
  emerged 
  from 
  an 
  over- 
  wintered 
  cocoon 
  on 
  June 
  4. 
  It 
  spun 
  a 
  very 
  thin 
  

   cocoon 
  and 
  had 
  evidently 
  killed 
  the 
  caterpillar, 
  as 
  no 
  trace 
  of 
  a 
  pupa 
  was 
  found. 
  The 
  

   recorded 
  hosts 
  of 
  this 
  parasite 
  are 
  Pxdisca 
  scudderiana, 
  two 
  other 
  Tortricids 
  and 
  a 
  

   Pyralid. 
  

  

  Glypta 
  vulgaris 
  Cress. 
  (Trans. 
  Am. 
  Ent. 
  Soc, 
  III, 
  157). 
  Two 
  specimens 
  of 
  this 
  

   common 
  parasite 
  emerged 
  on 
  August 
  25 
  and 
  27 
  from 
  thin, 
  white 
  cocoons 
  nearly 
  filling 
  

   their 
  host's 
  cocoon 
  in 
  a 
  wild 
  grape. 
  Like 
  Glypta 
  animosa, 
  this 
  species 
  evidently 
  kills 
  

   the 
  caterpillar, 
  but 
  it 
  works 
  on 
  the 
  summer 
  brood. 
  It 
  is 
  also 
  parasitic 
  on 
  a 
  species 
  of 
  

   Gelechia 
  and 
  on 
  a 
  Pyralid 
  (Margaronia 
  quadristigmalis) 
  . 
  

  

  » 
  Bui. 
  223, 
  Cornell 
  Univ. 
  Agr. 
  Exp. 
  Sta., 
  pp. 
  52-53, 
  1904. 
  

  

  