﻿44 
  

  

  EXPLANATION 
  OF 
  PLATES. 
  

  

  Plate 
  L 
  

  

  Map 
  of 
  Illinois 
  showing 
  known 
  distribution 
  of 
  San 
  Jose 
  scale, 
  

   with 
  extent 
  and 
  effects 
  of 
  treatment. 
  

  

  Plate 
  II. 
  

  

  Machine 
  sprayer, 
  with 
  gasoline 
  engine, 
  triplex 
  pump 
  and 
  double 
  

   tank 
  for 
  whale-oil 
  soap 
  solution. 
  

  

  Plate 
  III. 
  

  

  Fig. 
  I. 
  Gasoline 
  engine 
  of 
  machine 
  sprayer. 
  

  

  Fig. 
  2. 
  Battery 
  of 
  gasoline 
  burners 
  used 
  under 
  each 
  tank 
  for 
  boiling 
  

   whale-oil 
  soap 
  solution. 
  

  

  Plate 
  IV.* 
  

  

  Parasites 
  of 
  the 
  San 
  Jose 
  Scale. 
  

  

  Fig. 
  T. 
  Chilocorus 
  biviilnenis, 
  larva. 
  

  

  Fig. 
  2. 
  Clnloeoyus 
  bivuluerus, 
  adult 
  beetle. 
  

  

  Fig. 
  3. 
  Aplieliuus 
  diaspidis. 
  Not 
  a 
  parasite 
  of 
  the 
  San 
  Jose 
  scale, 
  

  

  but 
  closely 
  allied 
  to 
  A. 
  niytilaspidis, 
  whirli 
  is 
  parasitic 
  upon 
  

  

  this 
  scale. 
  

   I'^ig. 
  4, 
  5, 
  6. 
  Pent 
  ilia 
  misclla, 
  beetle, 
  larva, 
  and 
  pupa. 
  

   Fig. 
  7. 
  Spluerostilbe 
  coceophila. 
  

  

  *Figures 
  i, 
  2, 
  4, 
  5, 
  and 
  7 
  are 
  original. 
  Figi:res 
  j 
  and 
  hare 
  re-drawn 
  from 
  Bulletin 
  

   No 
  13 
  n. 
  s 
  , 
  U. 
  S. 
  Department 
  of 
  Agriculture, 
  Division 
  of 
  Entomology, 
  "The 
  San 
  

   Jose 
  Scale: 
  its 
  Occurrences 
  in 
  the 
  United 
  States, 
  with 
  a 
  full 
  Account 
  of 
  its 
  Life 
  

   History 
  and 
  the 
  Remedies 
  to 
  be 
  used 
  against 
  it," 
  pp. 
  51 
  and 
  52. 
  

  

  