﻿-67- 
  

  

  nearly 
  equal 
  width 
  throughout. 
  In 
  G. 
  abdoviinalis 
  the 
  back 
  of 
  the 
  

   abdomen 
  is 
  brownish, 
  while 
  in 
  G. 
  impictus 
  it 
  is 
  green 
  like 
  the 
  rest 
  of 
  the 
  

   body. 
  Cicadula 
  sexnotata 
  (PI. 
  II., 
  Fig. 
  i) 
  has 
  a 
  pair 
  of 
  black 
  dots 
  at 
  

   the 
  back 
  of 
  the 
  upper 
  surface 
  of 
  the 
  head, 
  and 
  in 
  front 
  of 
  each 
  of 
  these 
  

   a 
  pair 
  of 
  black 
  cross-bars. 
  The 
  genus 
  Empoasca 
  includes 
  the 
  tiny 
  

   yellowish 
  green 
  forms 
  excessively 
  abundant 
  in 
  beet 
  fields 
  and 
  elsewhere. 
  

   E. 
  viali 
  (PL 
  II., 
  Fig. 
  3) 
  has 
  six 
  white 
  spots 
  along 
  the 
  front 
  of 
  the 
  pro- 
  

   thorax; 
  E. 
  flavescens 
  (PI. 
  II., 
  Fig. 
  4) 
  has 
  only 
  three 
  larger 
  spots 
  

   in 
  that 
  situation; 
  and 
  Dicraneura 
  fieberi 
  is 
  somewhat 
  amber 
  tinted, 
  

   with 
  a 
  pale 
  cloud 
  on 
  the 
  prothorax. 
  Late 
  in 
  fall 
  we 
  once 
  found 
  a 
  

   number 
  of 
  grape-vine 
  leaf-hoppers 
  {Typhlocyba 
  — 
  PI. 
  III., 
  Fig. 
  i) 
  on 
  

   young 
  beets. 
  These, 
  like 
  the 
  forms 
  just 
  mentioned, 
  are 
  very 
  small 
  and 
  

   delicate, 
  but 
  are 
  brightly 
  marked 
  with 
  black, 
  ivory-white, 
  red, 
  and 
  

   other 
  colors. 
  

  

  Stobera 
  tricarinata 
  Say. 
  

   {^Delphax 
  tricarinata 
  Say, 
  Liburnia 
  intertexta 
  Uhl. 
  MS.*) 
  

   (PI. 
  I., 
  Fig. 
  I.) 
  

   This 
  common 
  leaf-hopper 
  ranges 
  from 
  Canada 
  and 
  New 
  Jersey 
  as 
  

   far 
  south 
  as 
  Texas 
  and 
  west 
  to 
  California. 
  We 
  have 
  taken 
  it 
  occasion- 
  

   ally 
  on 
  sugar 
  beets, 
  and 
  Bruner 
  has 
  recorded 
  it 
  as 
  a 
  beet 
  insect 
  under 
  

   the 
  name 
  Liburnia 
  intertexta. 
  We 
  have 
  collected 
  it 
  in 
  sweeping 
  grass 
  

   and 
  weeds 
  and 
  once 
  saw 
  it 
  puncturing 
  a 
  blade 
  of 
  corn. 
  

  

  It 
  hibernates 
  as 
  an 
  adult. 
  Our 
  data 
  indicate 
  that 
  this 
  leaf-hopper 
  

   is 
  two-brooded. 
  Adults 
  have 
  been 
  taken 
  by 
  us 
  principally 
  in 
  the 
  fall 
  

   months 
  and 
  December 
  and 
  again 
  in 
  April 
  and 
  May 
  (the 
  hibernating 
  

   brood), 
  and 
  at 
  the 
  end 
  of 
  June 
  and 
  in 
  July 
  (the 
  second 
  brood). 
  

  

  Liburnia 
  ornat 
  a 
  Stal. 
  

   (PI. 
  I.. 
  Fig. 
  3.) 
  

   This 
  pretty 
  little 
  insect 
  ranges 
  from 
  the 
  Mississippi 
  to 
  the 
  Atlantic 
  

   coast; 
  and 
  it 
  is 
  not 
  rare 
  in 
  the 
  sugar-beet 
  fields 
  of 
  Illinois. 
  Its 
  

   life 
  history 
  is 
  apparently 
  like 
  that 
  of 
  the 
  preceding 
  species. 
  It 
  has 
  been 
  

   taken 
  by 
  us 
  in 
  large 
  numbers 
  in 
  November 
  in 
  central 
  Illinois, 
  and 
  in 
  

   April 
  in 
  the 
  southern 
  part 
  of 
  the 
  state. 
  It 
  thus 
  seems 
  to 
  hibernate 
  as 
  

   an 
  adult. 
  We 
  have 
  again 
  found 
  it 
  abundant 
  on 
  grasses, 
  grains, 
  and 
  

   weeds 
  in 
  central 
  Illinois 
  in 
  July 
  and 
  in 
  southern 
  Illinois 
  in 
  August 
  — 
  a 
  

  

  plain 
  indication 
  of 
  a 
  second 
  brood. 
  

  

  • 
  

  

  ♦Concerning 
  this 
  name 
  Mr. 
  E. 
  P. 
  Van 
  Duzee 
  writes 
  us 
  under 
  date 
  of 
  October 
  20, 
  1899, 
  as 
  follows: 
  

   "In 
  the 
  National 
  Museum 
  is 
  a 
  pale 
  specime'n 
  that 
  so 
  far 
  as 
  I 
  can 
  discover 
  does 
  not 
  differ 
  in 
  any 
  re- 
  

   spect 
  from 
  the 
  females 
  of 
  Stobera 
  tricarinata 
  Say, 
  bearing 
  a 
  label 
  Liburnia 
  intertexta 
  Uhler. 
  The 
  

   name 
  seems 
  never 
  to 
  have 
  been 
  published. 
  If 
  no 
  transposition 
  has 
  been 
  made 
  at 
  the 
  Museum 
  you 
  will 
  

   be 
  perfectly 
  safe 
  in 
  quoting 
  this 
  as 
  the 
  female 
  of 
  Say's 
  species. 
  This 
  is 
  taken 
  from 
  some 
  unpublished 
  

   notes 
  of 
  mine 
  on 
  this 
  family 
  " 
  

  

  