﻿EXPLANATION 
  OF 
  PLATE 
  LXIII. 
  

  

  Fig. 
  1. 
  Larva 
  of 
  Harpalus, 
  feeding 
  on 
  eggs 
  of 
  locust; 
  enlarged. 
  (Emerton 
  del.) 
  

  

  Fig 
  2. 
  Larva 
  of 
  AntJwmyia 
  radicum, 
  var. 
  Calopteni 
  Elley, 
  feeding 
  on 
  eggs 
  of 
  locust. 
  

   a 
  larva, 
  enlarged 
  twice 
  ; 
  i, 
  pupa-case, 
  natural 
  size 
  ; 
  c, 
  the 
  same 
  raagnified 
  twice. 
  The 
  

   cross-lines 
  represent 
  the 
  length 
  of 
  body 
  and 
  expanse 
  of 
  wing 
  of 
  the 
  fly, 
  which 
  is 
  mag- 
  

   nified 
  three 
  times.— 
  (After 
  Curtis.) 
  „ 
  ^ 
  , 
  . 
  ■, 
  . 
  , 
  

  

  Fig. 
  3. 
  Red-tailed 
  Tachina 
  fly 
  (after 
  Riley), 
  a, 
  a 
  larva 
  of 
  Tachina 
  which 
  preys 
  on 
  

   the 
  European 
  cabbage-butterfly, 
  introduced 
  to 
  illustrate 
  the 
  maggot 
  of 
  Tachma. 
  

  

  Fig 
  4. 
  Tromhidium 
  sericeum 
  Say, 
  natural 
  size 
  aiid 
  magnified. 
  

  

  Fig. 
  5. 
  The 
  Red 
  mite, 
  young 
  of 
  a 
  species 
  of 
  TromUdiimn 
  {Asioma 
  gryllaria 
  Le 
  Baron) 
  ; 
  

  

  Fig, 
  6. 
  ' 
  Gordius 
  aqtiaticus. 
  A, 
  egg 
  ; 
  B, 
  egg 
  undergoing 
  segmentation 
  of 
  the 
  yolk 
  ; 
  C, 
  

   embryo 
  (gastrula) 
  with 
  the 
  primitive 
  stomach 
  an 
  infold 
  of 
  the 
  outer 
  germinal 
  layer 
  ot 
  

   cells 
  (ectoderm); 
  D, 
  embryo 
  farther 
  advanced 
  ; 
  E, 
  larva, 
  with 
  the 
  three 
  circles 
  of 
  spines 
  

   retracted 
  within 
  the 
  esophagus 
  ; 
  F, 
  the 
  same 
  stage 
  greatly 
  enlarged 
  to 
  show 
  the 
  in- 
  

   ternal 
  oro-ans 
  ; 
  c, 
  middle 
  circle 
  of 
  spin 
  es, 
  the 
  head 
  being 
  retracted 
  ; 
  m, 
  muscular 
  layer 
  (0; 
  

   t, 
  beak 
  or 
  proboscis 
  ; 
  i, 
  intestine 
  ; 
  z, 
  z, 
  embryonal 
  cells 
  ; 
  /, 
  excretory 
  tube 
  leading 
  from 
  

   a, 
  the 
  secretory 
  glands; 
  m, 
  ojsophagus; 
  v, 
  rectum; 
  n, 
  anus. 
  G, 
  the 
  second 
  larva, 
  

   encysted 
  in 
  a 
  fish— 
  (after 
  Villot). 
  H, 
  Gordius 
  varius, 
  end 
  of 
  body 
  of 
  male, 
  much 
  en- 
  

   larged. 
  I, 
  Gordius 
  aquaticas, 
  end 
  of 
  body 
  of 
  male, 
  much 
  enlarged. 
  K, 
  Gm-dms 
  

   ■ 
  aqtiaticus, 
  natural 
  size. 
  (H, 
  I, 
  K, 
  drawn 
  from 
  nature 
  by 
  J. 
  S. 
  Kingsley.) 
  

  

  