﻿U. 
  S. 
  DEPARTMENT 
  OF 
  AGRICULTURE, 
  

  

  BUREAU 
  OF 
  ENTOMOLOGY— 
  BULLETIN 
  No. 
  117. 
  

  

  L. 
  O. 
  HOWARD, 
  Entomologist 
  and 
  Chief 
  of 
  Bureau. 
  

  

  THE 
  RED 
  SPIDER 
  ON 
  HOPS 
  

  

  IN 
  THE 
  SACRAMENTO 
  VALLEY 
  

  

  OF 
  CALIFORNIA. 
  

  

  BY 
  

  

  WILLIAM 
  B. 
  PARKER, 
  M. 
  S., 
  

  

  Entomological 
  Assistant. 
  

  

  Issued 
  May 
  3, 
  1913. 
  

  

  WASHINGTON: 
  

  

  GOVERNMENT 
  PRINTING 
  OFFICE. 
  

  

  L013. 
  

  

  