﻿132 
  A. 
  T. 
  STANTON. 
  — 
  THE 
  ANOPHELES 
  OF 
  MALAYA. 
  

  

  middle 
  segments 
  they 
  are 
  broad 
  and 
  end 
  in 
  a 
  short 
  blunt-pointed 
  filament. 
  The 
  

   spiracle 
  comb 
  carries 
  fourteen 
  spine-like 
  processes 
  on 
  each 
  side, 
  four 
  of 
  which 
  are 
  of 
  

   larger 
  size 
  than 
  the 
  others 
  ; 
  the 
  basal 
  parts 
  of 
  these 
  processes 
  carry 
  minute 
  teeth. 
  

  

  The 
  Pupa. 
  

  

  The 
  first 
  abdominal 
  segment 
  bears 
  the 
  usual 
  pair 
  of 
  fan-like 
  tufts 
  of 
  branched 
  

   hairs. 
  Small 
  lateral 
  spines 
  are 
  present 
  on 
  the 
  fourth 
  to 
  seventh 
  abdominal 
  segments 
  ; 
  

   on 
  the 
  fourth 
  segment 
  these 
  spines 
  are 
  minute. 
  

  

  The 
  mature 
  larva 
  of 
  Jcochi 
  so 
  closely 
  resembles 
  that 
  of 
  another 
  Malayan 
  species, 
  

   tessellatus, 
  that 
  there 
  is 
  no 
  easily 
  recognisable 
  character 
  by 
  which 
  they 
  may 
  be 
  dis- 
  

   tinguished. 
  The 
  presence 
  of 
  a 
  pair 
  of 
  palmate 
  hairs 
  on 
  the 
  second 
  abdominal 
  segment 
  

   in 
  hochi 
  and 
  the 
  absence 
  of 
  this 
  structure 
  in 
  tessellatus 
  appears 
  to 
  be 
  constant. 
  There 
  

   is 
  no 
  very 
  close 
  resemblance 
  between 
  the 
  imagines 
  of 
  these 
  species, 
  apart 
  from 
  certain 
  

   markings, 
  such 
  as 
  the 
  lighter 
  colour 
  of 
  the 
  apical 
  half 
  of 
  the 
  proboscis 
  in 
  the 
  females 
  

   of 
  both. 
  

  

  From 
  this 
  and 
  similar 
  observations 
  in 
  other 
  species, 
  it 
  appears 
  that 
  the 
  most 
  that 
  

   is 
  likely 
  to 
  be 
  gained 
  of 
  practical 
  advantage 
  in 
  malaria 
  prevention 
  from 
  a 
  study 
  of 
  

   larval 
  forms 
  in 
  Anopheles 
  is 
  a 
  separation 
  into 
  groups 
  that 
  may 
  comprise 
  two 
  or 
  more 
  

   species. 
  These 
  studies 
  do 
  promise 
  however 
  to 
  give 
  us 
  a 
  clearer 
  knowledge 
  of 
  the 
  

   natural 
  affinities 
  of 
  species 
  than 
  has 
  been 
  gained 
  from 
  a 
  study 
  of 
  the 
  morphology 
  

   of 
  the 
  adult 
  insects. 
  

  

  I 
  am 
  indebted 
  to 
  Mr. 
  K. 
  W. 
  Blair 
  for 
  the 
  accompanying 
  drawings. 
  

  

  