﻿l8 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  lowish; 
  claws 
  long, 
  slender, 
  evenly 
  curved, 
  the 
  pulvilli 
  as 
  long 
  as 
  

   the 
  claws. 
  Genitalia; 
  basal 
  clasp 
  segment 
  stout, 
  truncate; 
  terminil 
  

   clasp 
  segment 
  rather 
  stout, 
  slightly 
  tapering; 
  dorsal 
  plate 
  short, 
  

   deeply 
  and 
  triangularly 
  emarginate, 
  the 
  lobes 
  diverging, 
  obliquely 
  

   truncate 
  and 
  sparsely 
  setose 
  ; 
  ventral 
  plate 
  long, 
  very 
  deeply 
  and 
  

   roundly 
  emarginate, 
  the 
  lobes 
  long, 
  slender, 
  with 
  a 
  few 
  coarse 
  

   setae 
  at 
  the 
  narrowly 
  rounded 
  apex; 
  style 
  short, 
  stout. 
  

  

  Female. 
  Length 
  1.5 
  mm. 
  Antennae 
  nearly 
  as 
  long 
  as 
  the 
  body, 
  

   rather 
  thickly 
  haired, 
  fuscous 
  yellowish, 
  yellowish 
  basally; 
  14 
  seg- 
  

   m.ents, 
  the 
  third 
  greatly 
  produced, 
  with 
  a 
  length 
  six 
  times 
  its 
  

   diameter, 
  the 
  fifth 
  subsessile, 
  cylindric^ 
  with 
  a 
  length 
  two 
  and 
  one 
  

   half 
  tim'es 
  its 
  diameter, 
  slightly 
  constricted 
  near 
  the 
  basal 
  third, 
  

   subbasal 
  and 
  subapical 
  whorls 
  rather 
  thick, 
  short, 
  strongly 
  curved; 
  

   terminal 
  segment 
  somewhat 
  produced, 
  the 
  apical 
  fourth 
  forming 
  

   a 
  broadly 
  rounded 
  knob. 
  Mesonotum 
  fuscous 
  yellowish, 
  the 
  sub- 
  

   median 
  lines 
  sparsely 
  haired. 
  Scutellum 
  and 
  postscutellum 
  fus- 
  

   cous 
  yellowish. 
  Abdomen 
  a 
  little 
  lighter, 
  the 
  distal 
  segments 
  

   slightly 
  fuscous. 
  Halteres 
  pale 
  yellowish. 
  Coxae, 
  femora 
  and 
  

   tibiae 
  mostly 
  pale 
  straw, 
  the 
  anterior 
  and 
  midtarsi 
  fuscous 
  yellow- 
  

   ish, 
  the 
  posterior 
  tarsi 
  apparently 
  pale 
  yellowish. 
  Ovipositor 
  nearly 
  

   as 
  long 
  as 
  the 
  body, 
  the 
  terminal 
  lobes 
  with 
  a 
  length 
  six 
  times 
  

   their 
  width, 
  very 
  slender, 
  subacute 
  apically 
  and 
  with 
  a 
  few 
  coarse 
  

   setae. 
  

  

  Life 
  history. 
  The 
  delicate 
  parent 
  midges 
  undoubtedly 
  appear 
  

   with 
  the 
  unfolding 
  of 
  the 
  blossom 
  buds 
  or 
  soon 
  after, 
  and 
  the 
  

   female 
  deposits 
  7 
  to 
  10 
  or 
  more 
  eggs. 
  These 
  hatch 
  quickly, 
  

   the 
  maggots 
  develop 
  rapidly 
  and 
  become 
  full 
  grown 
  at 
  about 
  

   blossoming 
  time. 
  Infested 
  blossom 
  buds 
  were 
  very 
  abundant 
  in 
  

   vineyards 
  June 
  11, 
  1908, 
  while 
  a 
  week 
  or 
  10 
  days 
  later 
  the 
  insects 
  

   had 
  practically 
  disappeared. 
  This 
  indicates 
  clearly 
  that 
  the 
  period 
  

   of 
  larval 
  existence 
  is 
  very 
  short. 
  The 
  maggots 
  or 
  larvae 
  either 
  

   drop 
  from 
  the 
  infested 
  bud 
  or 
  fall 
  with 
  it 
  and 
  seek 
  shelter 
  in 
  the 
  

   ground, 
  remaining 
  in 
  an 
  earthen 
  cocoon 
  during 
  the 
  rest 
  of 
  the 
  sea- 
  

   son 
  and 
  transforming 
  to 
  pupae 
  the 
  following 
  spring. 
  The 
  few 
  

   adults 
  reared 
  by 
  us 
  under 
  artificial 
  conditions 
  appeared 
  April 
  30, 
  

   1909. 
  It 
  is 
  probable 
  that 
  those 
  hibernating 
  in 
  the 
  field 
  do 
  not 
  

   emerge 
  till 
  much 
  later, 
  namely, 
  early 
  in 
  June 
  before 
  the 
  grapes 
  

   are 
  in 
  bloom. 
  There 
  appears 
  to 
  be 
  no 
  reason 
  for 
  believing 
  that 
  

   this 
  insect 
  can 
  subsist 
  upon 
  other 
  vines 
  than 
  grape, 
  unless 
  it 
  be 
  the 
  

   allied 
  Virginia 
  creeper. 
  The 
  extent 
  of 
  injury 
  is 
  undoubtedly 
  in- 
  

   fluenced 
  greatly 
  by 
  the 
  time 
  the 
  midges 
  appear, 
  since 
  if 
  they 
  fly 
  in 
  

   large 
  numbers 
  just 
  as 
  the 
  blossom 
  buds 
  appear 
  and 
  the 
  latter 
  are 
  

   therefore 
  in 
  a 
  favorable 
  condition 
  for 
  infestation, 
  there 
  is 
  likely 
  to 
  

   be 
  much 
  more 
  serious 
  injury. 
  This 
  is 
  probably 
  the 
  explanation 
  of 
  

  

  