﻿— 
  71 
  

  

  sometimes 
  seriously 
  injuring 
  the 
  vines 
  and 
  the 
  fruit 
  — 
  

   according 
  to 
  Walsh, 
  laying 
  its 
  eggs 
  in 
  the 
  stems, 
  thus 
  

   checking 
  the 
  growth, 
  and 
  puncturing 
  the 
  stems 
  of 
  the 
  

   clusters, 
  thus 
  causing 
  them 
  to 
  drop 
  off. 
  It 
  is 
  a 
  greedy 
  

   feeder, 
  in 
  many 
  cases 
  seemingly 
  pumping 
  out 
  more 
  sap 
  

   Fig. 
  8. 
  Oncometo- 
  than 
  it 
  nceds, 
  and 
  ejecting 
  this 
  backward 
  in 
  a 
  rapid 
  suc- 
  

   Piaun 
  ata. 
  ccssion 
  of 
  tiny 
  drops. 
  It 
  is 
  not 
  confined 
  to 
  the 
  grape, 
  but 
  

   may 
  be 
  seen 
  clinging 
  in 
  numbers 
  to 
  the 
  stems 
  of 
  the 
  blackberry, 
  rasp- 
  

   berry, 
  corn, 
  okra, 
  sunflower, 
  and 
  some 
  common 
  weeds. 
  Being 
  a 
  very 
  

   large 
  and 
  common 
  leaf-hopper, 
  pretty 
  well 
  distributed 
  over 
  the 
  eastern 
  

   United 
  States, 
  it 
  may 
  well 
  deserve 
  attention. 
  It 
  is 
  more 
  especially 
  a 
  

   southern 
  species, 
  and 
  in 
  Illinois 
  is 
  commonest 
  in 
  the 
  southern 
  part. 
  

  

  Very 
  little 
  is 
  known 
  of 
  its 
  yearly 
  history. 
  Walsh 
  surmises 
  that 
  it 
  

   hibernates 
  as 
  an 
  t%%, 
  the 
  slits 
  which 
  he 
  attributes 
  to 
  this 
  species 
  con- 
  

   taining 
  empty 
  shells 
  in 
  July. 
  Our 
  dates 
  for 
  the 
  adults 
  range 
  from 
  the 
  

   middle 
  of 
  May 
  to 
  the 
  middle 
  of 
  July 
  in 
  Illinois, 
  and 
  to 
  September 
  loth 
  

   in 
  the 
  Southern 
  States. 
  

  

  Diedrocephala 
  versuta 
  Say. 
  

   This 
  green-and-blue-striped 
  leaf-hopper 
  of 
  the 
  Southern 
  States 
  

   ranges 
  north 
  into 
  central 
  Illinois, 
  but 
  is 
  not 
  so 
  common 
  here 
  as 
  in 
  the 
  

   southern 
  part 
  of 
  the 
  state. 
  Examples 
  were 
  found 
  at 
  Urbana 
  early 
  in 
  

   October 
  on 
  sugar 
  beets 
  in 
  the 
  Experiment 
  Station 
  plats. 
  It 
  has 
  a 
  variety 
  

   of 
  food 
  plants, 
  and 
  in 
  the 
  South 
  is 
  very 
  abundant 
  on 
  cotton 
  but 
  not 
  

   seriously 
  injurious. 
  Osborn 
  says 
  that 
  it 
  is 
  similar 
  in 
  habits 
  to 
  D. 
  coccinea, 
  

   feeding 
  in 
  quiet 
  sheltered 
  spots 
  near 
  thickets 
  or 
  woods. 
  

  

  Diedrocephala 
  mollipes 
  Say. 
  

   We 
  have 
  in 
  this 
  large 
  dull 
  green 
  leaf-hopper 
  one 
  of 
  the 
  commonest 
  

   of 
  our 
  larger 
  species, 
  rarely 
  abundant 
  enough, 
  however, 
  to 
  be 
  econom- 
  

   ically 
  important. 
  Its 
  range 
  includes 
  

   the 
  United 
  States, 
  Canada, 
  Mexico, 
  

  

  IW"?;?vV 
  r 
  \J\<^f 
  T 
  \l^/ 
  ^'^"^ 
  Cuba. 
  It 
  was 
  found 
  frequently 
  

   J^^ 
  1 
  .^fFrtC 
  /^\ 
  *^^ 
  sugar 
  beets 
  in 
  October 
  at 
  Urbana, 
  

  

  '^ 
  "" 
  but 
  it 
  feeds 
  principally 
  on 
  sedges, 
  

  

  grasses, 
  and 
  grain 
  plants, 
  including 
  

   corn. 
  The 
  nymphs 
  are 
  light 
  green 
  

   or 
  yellowish, 
  with 
  sharply 
  pointed 
  

   heads 
  as 
  in 
  the 
  adults. 
  

  

  There 
  are 
  two 
  broods 
  of 
  this 
  

  

  species 
  in 
  a 
  year. 
  The 
  eggs 
  are 
  

  

  laid 
  in 
  rank 
  grasses 
  and 
  sedges 
  on 
  low 
  grounds, 
  and 
  although 
  we 
  have 
  

  

  found 
  the 
  adult 
  in 
  winter 
  shelter 
  as 
  late 
  as 
  December 
  i8th, 
  the 
  winter 
  is 
  

  

  passed 
  mostly 
  in 
  the 
  t.gg 
  stage. 
  Probably 
  a 
  few 
  nymphs 
  also 
  hibernate. 
  

  

  Fig. 
  9. 
  Diedrocephala 
  mollipes; 
  a, 
  young 
  

   nymph; 
  i, 
  older 
  nymph; 
  c, 
  adult. 
  (Osborn.) 
  

  

  