﻿596 
  REPORT 
  OF 
  NEW 
  JERSEY 
  STATE 
  MUSEUM. 
  

  

  growths 
  as 
  from 
  the 
  insects 
  themselves. 
  The 
  grubs 
  do 
  not 
  feed 
  upon 
  

   the 
  actual 
  gall 
  tissue, 
  but 
  lie 
  in 
  cells, 
  apparently 
  subsisting 
  upon 
  ma- 
  

   terial 
  secreted 
  from 
  the 
  inner 
  walls. 
  A 
  gall 
  may 
  have 
  only 
  one 
  larval 
  

   cell 
  and 
  is 
  then 
  unicellular, 
  or 
  it 
  may 
  have 
  a 
  great 
  many, 
  and 
  is 
  then 
  

   multicellular. 
  

  

  The 
  ovipositor 
  in 
  this 
  series 
  is 
  

   partly 
  coiled 
  within 
  the 
  abdomen, 
  

   which 
  is 
  usually 
  much 
  dilated 
  and 
  

   enlarged 
  posteriorly, 
  closely 
  joined 
  

   to 
  the 
  thorax, 
  but 
  not 
  sessile. 
  The 
  

   life 
  cycle 
  is 
  often 
  very 
  curious 
  and 
  

   complicated, 
  and 
  parthenogenesis 
  

   is 
  of 
  frequent 
  occurrence. 
  In 
  some 
  

   species 
  there 
  is 
  reason 
  for 
  believ- 
  

   ing 
  that 
  the 
  males 
  have 
  been 
  com- 
  

   pletely 
  eliminated, 
  while 
  in 
  others 
  

   there 
  is 
  an 
  alternation 
  of 
  genera- 
  

   tions, 
  one 
  having 
  both 
  sexes 
  nor- 
  

   mally 
  present, 
  while 
  in 
  the 
  other 
  the 
  females 
  only 
  occur. 
  None 
  of 
  the 
  

   species 
  are 
  really 
  harmful, 
  nor, 
  in 
  this 
  country, 
  are 
  any 
  of 
  them 
  useful, 
  

   though 
  in 
  some 
  European 
  countries 
  galls 
  are 
  commercially 
  important. 
  

  

  The 
  completeness 
  of 
  the 
  records 
  in 
  this 
  family 
  is 
  due 
  to 
  the 
  pains- 
  

   taking 
  work 
  of 
  Mr. 
  William 
  Beutenmuller, 
  whose 
  collections 
  in 
  the 
  

   vicinity 
  of 
  New 
  York 
  City 
  are 
  models 
  of 
  thoroughness. 
  Only 
  those 
  species 
  

   are 
  included 
  that 
  have 
  been 
  actually 
  found 
  in 
  New 
  Jersey, 
  or 
  whose 
  dis- 
  

   tribution 
  in 
  connection 
  with 
  the 
  food 
  plant 
  makes 
  it 
  almost 
  certain 
  that 
  

   careful 
  collection 
  will 
  demonstrate 
  its 
  presence. 
  

  

  Family 
  FIGITID^. 
  

   Contains 
  those 
  species 
  that 
  are 
  parasitic 
  in 
  most 
  instances. 
  

  

  EUCCELIDIA 
  Ashm. 
  

  

  E. 
  canadensis 
  Ashm. 
  (Figites) 
  Long 
  Island, 
  and 
  almost 
  surely 
  New 
  Jer- 
  

   sey. 
  

  

  SOLENASPIS 
  Ashm. 
  

   S. 
  armatus 
  Say. 
  New 
  Jersey 
  (Ashm). 
  

  

  EUCCELA 
  Westw. 
  

  

  E. 
  pedata 
  Say. 
  New 
  Jersey 
  district. 
  

  

  E. 
  stigmata 
  Say. 
  Jamesburg 
  VII, 
  15 
  (Sm). 
  

  

  E. 
  impatiens 
  Say. 
  (Psilodera) 
  Jamesburg 
  VII, 
  15 
  (Sm). 
  

  

  