﻿EXPLANATION 
  OF 
  PLATES. 
  

  

  PLATE 
  IV. 
  

  

  A 
  healthy 
  stalk 
  of 
  wheat 
  on 
  the 
  left, 
  the 
  one 
  on 
  

   the 
  right 
  dwarfed 
  and 
  the 
  lower 
  leaves 
  begin- 
  

   ning 
  to 
  wither 
  and 
  turn 
  yellow; 
  the 
  stem 
  

   swollen 
  at 
  three 
  places, 
  near 
  the 
  ground, 
  where 
  

   the 
  flaxseeds 
  (h) 
  are 
  situated, 
  hetween 
  the 
  stem 
  

   and 
  sheathing 
  base 
  of 
  the 
  leaf. 
  

  

  «, 
  egg 
  of 
  the 
  Hessian 
  Fly 
  (greatly 
  enlarged, 
  as 
  

   are 
  all 
  the 
  figures 
  except 
  e 
  and 
  h) 
  . 
  

  

  b, 
  the 
  larva, 
  enlarged 
  ; 
  the 
  line 
  by 
  the 
  side, 
  in 
  this 
  

   and 
  other 
  figures, 
  showing 
  the 
  natural 
  length. 
  

  

  "C, 
  the 
  flaxseed, 
  puparium 
  or 
  pupa 
  case. 
  

  

  d, 
  the 
  pupa 
  or 
  chrysalis 
  

  

  e, 
  the 
  Hessian 
  Fly, 
  natural 
  size, 
  laying 
  its 
  eggs 
  in 
  

   the 
  creases 
  of 
  the 
  1 
  af. 
  

  

  /, 
  female 
  Hessian 
  Fly, 
  much 
  enlarged. 
  

  

  g, 
  male 
  Hessian 
  Fly, 
  much 
  enlarged. 
  

  

  h, 
  flaxseed 
  between 
  the 
  leaves 
  and 
  stalk. 
  

  

  i, 
  chalcid 
  or 
  ichneumon 
  parasite 
  of 
  the 
  Hessian 
  

  

  Fly: 
  male, 
  enlarged. 
  

   Figs, 
  b, 
  drawn 
  by 
  Mr. 
  Riley 
  ; 
  d 
  and 
  /, 
  by 
  Mr. 
  • 
  

  

  Burgess 
  ; 
  a, 
  g, 
  and 
  c, 
  i, 
  by 
  the 
  author 
  ; 
  copied 
  

  

  on 
  wood 
  by 
  L. 
  Trouvelot. 
  

  

  PLATE 
  V. 
  

  

  Fig. 
  a. 
  Side 
  view 
  of 
  the 
  female 
  Hessian 
  Fly, 
  

   greatly 
  enlarged 
  : 
  a, 
  three 
  joints 
  taken 
  

   from 
  the 
  middle 
  of 
  the 
  antennsB 
  of 
  the 
  

   female; 
  a', 
  the 
  three 
  terminal 
  female 
  

   antennal 
  joints 
  ; 
  a", 
  the 
  four 
  basal, 
  and 
  

   a'", 
  the 
  two 
  terminal 
  male 
  antennal 
  

   joints 
  ; 
  b, 
  a 
  maxillary 
  palpus; 
  c, 
  scales 
  

   from 
  the 
  body 
  and 
  wings 
  ; 
  d, 
  e, 
  side 
  and 
  

   vertical 
  view 
  of 
  the 
  last 
  joint 
  of 
  the 
  

   foot, 
  showing 
  the 
  claws, 
  and 
  food-pad 
  

   or 
  pulviUus 
  between 
  them, 
  and 
  the 
  

   scales 
  on 
  the 
  joint. 
  Prawn 
  by 
  Mr. 
  E. 
  

   Burgess. 
  

  

  Fig. 
  B. 
  Larva 
  magnified, 
  with 
  the 
  breast-bone 
  in 
  

   the 
  2d 
  next 
  ring 
  to 
  the 
  head 
  : 
  Ba, 
  the 
  

   breast-bone 
  highly 
  magnified 
  ; 
  B6, 
  

  

  head 
  from 
  beneath, 
  enlarged 
  ; 
  Be, 
  lar- 
  

   val 
  spiracle 
  and 
  its 
  tubercle 
  and 
  tra- 
  

   chea 
  leading 
  from 
  the 
  spiracle. 
  B 
  

   drawn 
  by 
  Mr. 
  Eiley 
  ; 
  Ba, 
  B6, 
  Be, 
  by 
  

   Mr. 
  Burgess. 
  

  

  Fig 
  C. 
  Side 
  and 
  front 
  view 
  of 
  the 
  pupa 
  or 
  chrys- 
  

   alis. 
  Drawn 
  by 
  Burgesa. 
  The 
  abdo- 
  

   men 
  of 
  the 
  sidQ 
  view 
  of 
  pupa 
  is 
  rather 
  

   long, 
  as 
  the 
  insect, 
  when 
  drawn, 
  was 
  

   just 
  emerging 
  from 
  the 
  semi-pupa 
  

   stage, 
  which 
  it 
  assumed 
  December 
  1st. 
  

  

  Fig. 
  D. 
  The 
  flaxseed, 
  puparium, 
  or 
  pupa 
  case. 
  

   The 
  line 
  by 
  the 
  side 
  of 
  the 
  complete 
  

   figures 
  denotes 
  the 
  natural 
  length 
  of 
  

   the 
  insect. 
  

  

  PLATE 
  VI. 
  

  

  Fig. 
  1. 
  Ghalcophoravirginica? 
  : 
  an«, 
  antenna; 
  Ibr, 
  

   labrum; 
  md, 
  mandible; 
  mx, 
  1st 
  max- 
  

   illa; 
  mx', 
  2d 
  maxilla 
  (labium); 
  Ip, 
  

   labial 
  palpus 
  ; 
  (this 
  lettering 
  the 
  same 
  

   for 
  the 
  other 
  figures 
  on 
  Plates 
  YI-XV 
  ; 
  

   I. 
  pal, 
  labial 
  palpus, 
  enlarged; 
  s, 
  seta; 
  

   ch, 
  chitinous 
  support. 
  

  

  Fig. 
  2. 
  Dicerca 
  divaricata, 
  enlarged 
  about 
  twice: 
  

   b, 
  head 
  and 
  three 
  thoracic 
  segments, 
  

   seen 
  from 
  beneath. 
  

  

  All 
  the 
  figures 
  and 
  details 
  

  

  Fig. 
  3. 
  Unknown 
  larva, 
  sweet 
  gum 
  tree, 
  Houston, 
  

   Texas: 
  v, 
  ventral 
  view; 
  p, 
  prothorax; 
  

   m, 
  mesothorax 
  ; 
  m', 
  metathorax. 
  

  

  Fig. 
  5. 
  Buprestid 
  larva 
  from 
  under 
  hemlock 
  bark: 
  

   a, 
  natural 
  size; 
  b, 
  head 
  and 
  protho- 
  

   rax 
  from 
  above; 
  c, 
  the 
  same, 
  drawn 
  

   from 
  below. 
  

  

  drawn 
  by 
  Dr. 
  C. 
  F. 
  Gissler. 
  

  

  PLATE 
  VIL 
  

  

  Fig. 
  1. 
  Alaphidion 
  parallelum: 
  a, 
  from 
  above; 
  

  

  b, 
  from 
  beneath 
  ; 
  /, 
  ligula-like 
  process 
  

  

  situated 
  behind 
  and 
  not 
  between 
  the 
  

  

  labial 
  palpi. 
  

   Fig. 
  2. 
  Unknown 
  longicorn 
  larva 
  under 
  bark 
  of 
  

  

  pin 
  oak, 
  Houston, 
  Tex. 
  ; 
  v, 
  under 
  side. 
  

  

  Fig. 
  3. 
  Criocephalus 
  agrestis: 
  pupa, 
  dorsal 
  view, 
  

  

  enlarged 
  2 
  times. 
  

   Fig. 
  3a. 
  Criocephalus 
  agrestis 
  : 
  pupa, 
  ventral 
  view, 
  

   Fig. 
  4. 
  Melanophila, 
  under 
  bark 
  of 
  spruce: 
  v 
  «, 
  

  

  under 
  side 
  of 
  prothoracic 
  disc. 
  (See, 
  

  

  also, 
  PL 
  XII, 
  Fig. 
  1.) 
  

  

  Grissler 
  del. 
  

  

  PLATE 
  VIII. 
  

  

  Fig. 
  1. 
  Unknown 
  longicorn 
  larva, 
  from 
  under 
  

   bark 
  of 
  pitch 
  pine, 
  Atlanta, 
  Ga. 
  X 
  2 
  

   times 
  : 
  va, 
  head 
  and 
  five 
  succeeding 
  seg- 
  

   ments, 
  from 
  beneath; 
  vb, 
  4th 
  abdomi- 
  

   nal 
  segment, 
  from 
  beneath; 
  vc, 
  7th 
  

   abdominal 
  segment, 
  from 
  beneath; 
  Fig. 
  2. 
  

   lat, 
  lateral 
  view 
  of 
  head 
  and 
  four 
  suc- 
  

   ceeding 
  segments, 
  with 
  prothoracic 
  

   and 
  1st 
  abdominal 
  spiracle; 
  md, 
  two 
  

   views 
  of 
  the 
  mandibles. 
  Length 
  of 
  

  

  larva 
  37""" 
  ; 
  width 
  of 
  prothoracic 
  seg- 
  

   ment 
  lO"""; 
  length 
  of 
  same 
  d.S"™ 
  ; 
  

   width 
  of 
  mesothoracic 
  9.5°™; 
  of 
  1st 
  

   abdominal 
  segment 
  9°"". 
  Average 
  

   width 
  S.l""". 
  

   Saperda 
  tridentata. 
  Length 
  IS"""; 
  width 
  

   of 
  prothoracic 
  segment 
  5"""; 
  v, 
  under 
  

   side 
  of 
  head 
  and 
  five 
  succeeding 
  seg- 
  

   ments 
  ; 
  lat, 
  lateral 
  views 
  of 
  the 
  same; 
  

   md, 
  three 
  views 
  of 
  the 
  mandibles. 
  

  

  All 
  the 
  figures 
  enlarged, 
  and 
  drawn 
  by 
  C. 
  F. 
  Gissler, 
  under 
  the 
  author's 
  directions. 
  

  

  