﻿DESCRIPTION. 
  

  

  11 
  

  

  tion 
  to 
  rest 
  of 
  the 
  body. 
  Color 
  translucent 
  white. 
  Head 
  large, 
  quadrate; 
  eyes 
  

   reddish 
  ; 
  ocelli 
  absent. 
  Antennae 
  0.195 
  mm. 
  in 
  length, 
  apparently 
  7-segmented 
  ; 
  

   basal 
  segment 
  cylindrical, 
  short 
  ; 
  second 
  nearly 
  twice 
  as 
  long 
  as 
  first, 
  barrel- 
  

   shaped 
  ; 
  third 
  and 
  fourth 
  spindle-shaped, 
  ringed 
  with 
  a 
  few 
  fine 
  hairs; 
  fifth, 
  

   sixth, 
  and 
  seventh 
  slender, 
  nearly 
  equal 
  in 
  length. 
  Legs 
  translucent 
  white. 
  

   Abdomen 
  tapering 
  posteriorly 
  ; 
  first 
  eight 
  segments 
  nearly 
  equal 
  in 
  length, 
  last 
  

   two 
  segments 
  longer 
  than 
  others; 
  each 
  abdominal 
  segment 
  with 
  longitudinal 
  

   rows 
  of 
  setae, 
  the 
  tenth 
  with 
  

   four 
  setse 
  about 
  0.045 
  mm. 
  in 
  

   length. 
  

  

  At 
  this 
  stage 
  there 
  seems 
  to 
  

   be 
  nothing 
  to 
  distinguish 
  this 
  

   species 
  from 
  H. 
  hwmorrhoidalis. 
  

  

  THE 
  SECOND-STAGE 
  LARVA. 
  

   (Fig. 
  5.) 
  

  

  Length, 
  1.05 
  mm. 
  ; 
  width 
  of 
  

   mesothorax, 
  0.27 
  mm. 
  Shape 
  

   fusiform, 
  about 
  same 
  as 
  larva 
  ; 
  

   of 
  mesothorax 
  and 
  metathorax 
  

   long, 
  robust, 
  cylindrical; 
  sides 
  

   of 
  mesothorax 
  and 
  metathorax 
  

   and 
  first 
  five 
  abdominal 
  seg- 
  

   ments 
  nearly 
  parallel; 
  pro- 
  

   thorax 
  narrowed 
  toward 
  head; 
  

   last 
  five 
  abdominal 
  segments 
  

   tapering 
  to 
  the 
  last 
  segment, 
  

   which 
  is 
  cylindrical 
  and 
  trun- 
  

   cated 
  at 
  end. 
  Color 
  of 
  head 
  

   and 
  pro 
  thorax 
  light 
  yellow, 
  

   mesothorax 
  and 
  metathorax 
  

   and 
  first 
  six 
  segments 
  of 
  abdo- 
  

   men 
  translucent 
  white, 
  stained 
  

   on 
  sides 
  with 
  crimson 
  blotches 
  

   and 
  with 
  yellow 
  on 
  dorsum 
  to 
  

   some 
  extent 
  ; 
  next 
  three 
  seg- 
  

   ments 
  of 
  abdomen 
  .the 
  color 
  of 
  

   head, 
  last 
  segment 
  of 
  abdomen 
  

   white; 
  alimentary 
  tract 
  plainly 
  

   indicated 
  by 
  the 
  brownish 
  color 
  

   given 
  it 
  by 
  inclosed 
  food. 
  Surface 
  of 
  body 
  covered 
  with 
  minute 
  granulations. 
  

   I 
  lend 
  quadrate, 
  rounded 
  in 
  front 
  and 
  notched 
  behind 
  the 
  eyes, 
  0.12 
  nun. 
  long, 
  

   0.0825 
  nun. 
  wide: 
  eyes 
  small, 
  reddish; 
  ocelli 
  absent. 
  Antenna* 
  7-segmented, 
  first 
  

   four 
  segments 
  die 
  color 
  of 
  head, 
  the 
  others 
  translucent 
  white; 
  first 
  segment 
  

   short, 
  cylindrical; 
  second 
  longer, 
  barrel-shaped; 
  third 
  and 
  fourth 
  spindle-shaped 
  

   and 
  annulated; 
  fifth, 
  sixth, 
  and 
  seventh 
  slender 
  and 
  cylindrical. 
  Legs 
  long, 
  

   yellowish. 
  Abdomen 
  0.60 
  mm. 
  in 
  length, 
  fusiform, 
  ovipositor 
  not 
  formed 
  ; 
  seg- 
  

   ments 
  with 
  rows 
  of 
  line 
  setffl 
  increasing 
  in 
  length 
  toward 
  posterior 
  end; 
  ninth 
  

   and 
  tenth 
  segments 
  with 
  longer 
  seta?. 
  

  

  Fiu. 
  4. 
  

  

  The 
  bean 
  thripa 
  : 
  First-stage 
  larva. 
  Greatly 
  

   enlarged. 
  (Original.) 
  

  

  