﻿LETTER 
  OF 
  TRANSMITTAL. 
  

  

  U. 
  S. 
  Department 
  of 
  Agriculture, 
  

  

  Bureau 
  of 
  Entomology, 
  

   Washington, 
  D. 
  C, 
  April 
  2i, 
  1912. 
  

   Sir: 
  I 
  have 
  the 
  honor 
  to 
  transmit 
  herewith 
  for 
  publication 
  a 
  manu- 
  

   script 
  entitled 
  " 
  The 
  Bean 
  Thrips," 
  by 
  H. 
  M. 
  Eussell, 
  an 
  entomo- 
  

   logical 
  assistant 
  of 
  this 
  bureau. 
  

  

  This 
  bulletin 
  deals 
  with 
  an 
  insect 
  pest 
  of 
  the 
  family 
  Thripidse, 
  

   the 
  study 
  of 
  which 
  has 
  been 
  hitherto 
  largely 
  neglected, 
  and 
  which 
  of 
  

   recent 
  years 
  has 
  attracted 
  considerable 
  attention 
  from 
  an 
  economic 
  

   standpoint, 
  as 
  the 
  cause 
  of 
  immense 
  losses 
  in 
  the 
  Pacific 
  coast 
  regions 
  

   and 
  elsewhere 
  to 
  truck 
  farmers. 
  The 
  insect 
  is 
  closely 
  related 
  to 
  the 
  

   tobacco 
  thrips, 
  as 
  well 
  as 
  to 
  the 
  onion 
  thrips, 
  to 
  which 
  species 
  are 
  

   chargeable 
  untold 
  losses 
  in 
  the 
  production 
  of 
  these 
  two 
  staples. 
  Ex- 
  

   periments 
  to 
  produce 
  formulae 
  and 
  devices 
  with 
  which 
  successfully 
  

   to 
  combat 
  this 
  insect 
  are 
  being 
  perfected, 
  and 
  methods 
  for 
  the 
  com- 
  

   plete 
  control 
  of 
  the 
  pest 
  are 
  early 
  expected. 
  

  

  I 
  recommend 
  the 
  publication 
  of 
  this 
  manuscript 
  as 
  Bulletin 
  No. 
  

   118 
  of 
  this 
  bureau. 
  

  

  Respectfully, 
  L. 
  O. 
  Howard, 
  

  

  Chief 
  of 
  Bureau. 
  

   Hon. 
  James 
  Wilson, 
  

  

  Secretary 
  of 
  Agriculture. 
  

  

  