﻿16 
  THE 
  BEAN 
  THRIPS. 
  

  

  Without 
  doubt 
  this 
  insect 
  occurs 
  over 
  the 
  entire 
  Pacific 
  coast 
  of 
  

   the 
  United 
  States 
  and 
  down 
  into 
  Mexico 
  for 
  some 
  distance 
  and 
  pos- 
  

   sibly 
  even 
  into 
  Central 
  America. 
  As 
  it 
  becomes 
  better 
  known 
  it 
  

   will 
  probably 
  be 
  found 
  to 
  occur 
  in 
  several 
  of 
  the 
  other 
  Western 
  

   States 
  and 
  some 
  of 
  the 
  Eastern 
  States 
  as 
  well. 
  

  

  HISTORY. 
  

  

  In 
  1895 
  Mr. 
  Theodore 
  Pergande 
  (l) 
  1 
  described 
  this 
  species 
  from 
  one 
  

   specimen 
  received 
  from 
  Yuba 
  County, 
  Cal., 
  where 
  it 
  was 
  taken 
  on 
  

   an 
  orange 
  leaf 
  infested 
  with 
  (Aspidiotus) 
  Chrysomphalus 
  aurantii 
  

   Mask. 
  At 
  that 
  time 
  he 
  expressed 
  the 
  opinion 
  that 
  the 
  occurrence 
  

   on 
  this 
  plant 
  was 
  accidental. 
  In 
  view 
  of 
  our 
  present 
  knowledge, 
  

   however, 
  of 
  the 
  feeding 
  habits 
  of 
  this 
  insect, 
  this 
  specimen 
  was 
  

   probably 
  feeding 
  on 
  the 
  foliage 
  of 
  the 
  orange 
  itself. 
  

  

  In 
  1902 
  Hinds 
  (3) 
  redescribed 
  the 
  female 
  from 
  one 
  specimen 
  in 
  

   the 
  collection 
  of 
  the 
  Bureau 
  of 
  Entomology. 
  At 
  that 
  time 
  he 
  wrote 
  

   that 
  nothing 
  was 
  known 
  of 
  the 
  life 
  history. 
  

  

  Miss 
  Daniels 
  (4), 
  writing 
  in 
  1904, 
  noted 
  the 
  occurrence 
  of 
  this 
  

   thrips 
  in 
  California. 
  At 
  the 
  same 
  time 
  she 
  erected 
  a 
  new 
  genus 
  and 
  

   species, 
  Caliothrips 
  ivoodworthi 
  (4), 
  for 
  the 
  male 
  of 
  Heliothrips 
  

   fasciatus. 
  This 
  error 
  was 
  first 
  pointed 
  out 
  by 
  Dudley 
  Moult 
  on 
  (6) 
  

   in 
  1907, 
  and 
  the 
  present 
  writer 
  agrees 
  with 
  him, 
  as 
  the 
  male 
  of 
  

   fasciatus 
  fits 
  the 
  description 
  exactly 
  except 
  in 
  the 
  number 
  of 
  an- 
  

   tennal 
  segments. 
  Undoubtedly 
  Miss 
  Daniels 
  made 
  a 
  mistake 
  in 
  the 
  

   number 
  of 
  segments 
  in 
  the 
  antenna, 
  since 
  fasciatus 
  is 
  8-segmented 
  only 
  . 
  

  

  Crawford 
  (7), 
  in 
  1909, 
  under 
  "Notes 
  on 
  California 
  Thysanop- 
  

   tera," 
  records 
  taking 
  numerous 
  specimens 
  in 
  southern 
  California. 
  

   These 
  were 
  captured 
  on 
  pine, 
  Lotus 
  glaber, 
  and 
  apple. 
  

  

  Under 
  the 
  name 
  Euthrips 
  fasciatus, 
  Bremner 
  (8), 
  in 
  1910, 
  reported 
  

   this 
  insect 
  as 
  injuring 
  beans 
  and 
  peas 
  and 
  as 
  occurring 
  on 
  alfalfa 
  

   and 
  on 
  peach 
  and 
  pear 
  trees. 
  He 
  recommended 
  spraying 
  with 
  nico- 
  

   tine 
  solutions, 
  and 
  wrote 
  that 
  of 
  these 
  sulphate 
  of 
  nicotine 
  in 
  the 
  

   proportion 
  of 
  1 
  ounce 
  to 
  5 
  gallons 
  of 
  water 
  had 
  given 
  perfect 
  

   success. 
  

  

  In 
  1911 
  Coit 
  and 
  Packard 
  (9) 
  wrote 
  that 
  the 
  bean 
  thrips 
  caused 
  

   considerable 
  defoliation 
  to 
  cotton 
  and 
  alfalfa 
  in 
  Imperial 
  Valley, 
  Cal. 
  

   Moulton 
  ( 
  10) 
  also 
  gave 
  a 
  list 
  of 
  its 
  food 
  plants. 
  

  

  The 
  present 
  writer, 
  in 
  1911 
  (12) 
  and 
  also 
  in 
  1912 
  (13), 
  published 
  

   two 
  papers 
  dealing 
  with 
  the 
  life 
  history 
  and 
  habits 
  of 
  Thripoctenus 
  

   russelli 
  Crawf., 
  a 
  parasite 
  reared 
  in 
  large 
  numbers 
  from 
  this 
  thrips. 
  

  

  RECENT 
  RECORDS. 
  

  

  This 
  species, 
  as 
  identified 
  by 
  Mr. 
  Pergande, 
  was 
  sent 
  to 
  the 
  Bureau 
  

   of 
  Entomology 
  January 
  25, 
  1898, 
  by 
  Mr. 
  M. 
  J. 
  Wessels, 
  of 
  Lewiston, 
  

  

  1 
  Numbers 
  in 
  parentheses 
  refer 
  to 
  the 
  Bibliography, 
  pp. 
  44-45. 
  

  

  