﻿Ill 
  

  

  Plate 
  IV.* 
  

  

  Fig. 
  1. 
  San 
  Jose 
  Scale, 
  adult 
  male. 
  Greatly 
  enlarged. 
  

  

  Fig. 
  2. 
  Development 
  of 
  male 
  insect: 
  a, 
  ventral 
  view 
  of 
  larva 
  after 
  

   first 
  molt; 
  b, 
  same, 
  after 
  second 
  molt 
  (pro-ptipa 
  stage) 
  ; 
  c 
  

   and 
  (/, 
  true 
  pupa, 
  ventral 
  and 
  dorsal 
  views. 
  All 
  greatly 
  

   enlarged. 
  

  

  Plate 
  V. 
  

  

  Middle 
  portion 
  of 
  alimentary 
  canal 
  of 
  Chinch-bug, 
  showing 
  closed 
  

   tubular 
  appendages 
  (c(eca) 
  which 
  always 
  contain 
  bacteria 
  (see 
  p. 
  

   57): 
  a, 
  posterior 
  end 
  of 
  second 
  stomach; 
  b. 
  third 
  stomach; 
  c, 
  c, 
  c, 
  

   etc., 
  eight 
  ccecal 
  appendages, 
  which 
  contain 
  bacteria; 
  d, 
  tubular 
  in- 
  

   testine 
  behind 
  cceca; 
  e, 
  enlargement 
  of 
  intestine 
  into 
  which 
  Mal- 
  

   pighian 
  tubules 
  open; 
  /, 
  /, 
  etc., 
  cut 
  ends 
  of 
  Malpighian 
  tubules; 
  g, 
  

   cut 
  end 
  of 
  rectum. 
  Prepared 
  by 
  S. 
  A. 
  Forbes. 
  

  

  Plate 
  VI. 
  

  

  Fig. 
  1. 
  Growth 
  of 
  white 
  muscardine 
  fungus 
  (Sporotrichum) 
  on 
  

   chinch-bug 
  infected 
  at 
  death. 
  (See 
  p. 
  97.) 
  

  

  Fig. 
  2. 
  Retaining 
  valve 
  of 
  automatic 
  air-brake 
  showing 
  air-vent 
  

   plugged 
  with 
  mud 
  by 
  Solitary 
  Wasp, 
  Odynerns 
  forami- 
  

  

  Plate 
  VII. 
  

  

  Fig. 
  1. 
  Air-brake 
  valve 
  broken 
  to 
  show 
  mud 
  plugs 
  made 
  by 
  Solitary 
  

   Wasp. 
  (See 
  p. 
  104.) 
  

  

  Fig. 
  2. 
  Solitary 
  Wasp, 
  Odyjieriis 
  foramincdus, 
  bred 
  from 
  plugged 
  

   valve 
  of 
  air-brake. 
  (See 
  p. 
  104.) 
  ^ 
  

  

  Plate 
  VIII. 
  

  

  Fig. 
  1. 
  Part 
  of 
  fatty 
  body 
  of 
  diseased 
  Army 
  Worm. 
  (See 
  p. 
  107.) 
  

  

  Fig. 
  2. 
  Single 
  cell 
  from 
  slightly 
  affected 
  part 
  of 
  fatty 
  body 
  of 
  Fig. 
  1. 
  

  

  Fig. 
  3. 
  Single 
  cell 
  of 
  greatly 
  affected 
  part 
  of 
  fatty 
  body 
  of 
  Fig. 
  1. 
  

  

  Fig. 
  4. 
  Epithelial 
  cells 
  of 
  Malpighian 
  tubule 
  of 
  same 
  Army 
  Worm. 
  

   (Seep. 
  107.) 
  

  

  Fig. 
  5. 
  Cluster 
  of 
  characteristic 
  granules 
  of 
  disease. 
  (See 
  p. 
  107.) 
  

  

  Fig. 
  6. 
  Blood 
  corpuscle 
  of 
  diseased 
  Army 
  Worm, 
  containing 
  charac- 
  

   teristic 
  granules. 
  (See 
  p. 
  107.) 
  

  

  Fig. 
  7. 
  Nucleated 
  arad^boid 
  cell, 
  containing 
  dark 
  granules; 
  proba- 
  

   bly 
  a 
  blood 
  corpuscle. 
  

  

  * 
  From 
  Bull. 
  Xo. 
  3, 
  N. 
  S.. 
  V. 
  S. 
  Dept. 
  Aarr.. 
  Div. 
  Ent. 
  

  

  