﻿124 
  

  

  Fig. 
  36. 
  2. 
  stage. 
  Pharyngeal 
  skeleton. 
  ^^/i. 
  

  

  - 
  37. 
  - 
  - 
  Anterior 
  spiracles. 
  ^^^/i. 
  The 
  letters 
  as 
  

  

  in 
  fig. 
  15. 
  

  

  - 
  3<S. 
  3. 
  - 
  Anterior 
  spiracles. 
  ^^Vi. 
  The 
  letters 
  as 
  

  

  in 
  fig. 
  15. 
  

  

  - 
  39. 
  - 
  - 
  Posterior 
  spiracles. 
  ^Vi. 
  sa. 
  as 
  in 
  fig. 
  18. 
  

  

  Ocijptera 
  brassicnria 
  F. 
  

   Fig. 
  40. 
  1. 
  stage. 
  Pharyngeal 
  skeleton. 
  -^'^/i. 
  The 
  letters 
  as 
  

   in 
  fig. 
  11. 
  

  

  - 
  41. 
  2. 
  - 
  Pharyngeal 
  skeleton. 
  ^^^/i. 
  

  

  - 
  42. 
  - 
  - 
  Posterior 
  spiracles. 
  ^^^/i. 
  The 
  letters 
  as 
  

  

  in 
  fig. 
  15. 
  

  

  - 
  43. 
  3. 
  - 
  Pharyngeal 
  skeleton. 
  *'^/i. 
  

  

  Undetermined 
  parasite 
  in 
  Lithobius 
  sp. 
  

   Fig. 
  44. 
  3. 
  stage. 
  Anterior 
  spiracles. 
  

  

  - 
  45. 
  - 
  - 
  Posterior 
  spiracles. 
  ^^^k. 
  

  

  PL 
  III. 
  

  

  Ptychomyia 
  selecta 
  Meig. 
  

   Fig. 
  46. 
  1. 
  stage. 
  Part 
  of 
  the 
  armature 
  of 
  spines 
  with 
  single 
  

   large 
  spines. 
  ^^^Ii. 
  

  

  - 
  47. 
  - 
  - 
  The 
  eggshell 
  (æ) 
  and 
  the 
  chit.inous 
  funnel 
  

  

  surrounding 
  the 
  hole 
  (ih) 
  through 
  which 
  

   the 
  parasite 
  has 
  penetrated. 
  '*^/i. 
  

  

  - 
  48. 
  2. 
  - 
  Spines 
  on 
  the 
  hind 
  margin 
  of 
  a 
  segment 
  

  

  pointing 
  forwards 
  (a) 
  and 
  spines 
  on 
  the 
  

   fiont 
  margin 
  of 
  the 
  following 
  pointing 
  

   backwards 
  (b) 
  i^o/j 
  

  

  - 
  49. 
  3. 
  - 
  Posterior 
  spiracles; 
  a. 
  normal 
  with 
  3 
  respi- 
  

  

  ratory 
  areas, 
  b. 
  abnormal 
  with 
  only 
  2 
  areas. 
  

   ^^2/i. 
  sa. 
  as 
  in 
  fig. 
  18. 
  

  

  Bactromyia 
  aurulenta 
  Meig. 
  

   Fig. 
  50. 
  3. 
  stage. 
  Part 
  of 
  the 
  armature 
  of 
  spines 
  from 
  the 
  

   last 
  segment, 
  -^^/i. 
  

  

  