﻿MOSQUITOS 
  OF 
  FAR 
  EASTERN 
  PORTS. 
  335 
  

  

  (B). 
  Larvae 
  from 
  artificial 
  collections 
  of 
  water 
  : 
  jars, 
  tubs, 
  barrels, 
  tins, 
  etc. 
  : 
  — 
  

   Stegomyia 
  fasciata 
  ; 
  Armigeres 
  obturbans, 
  Walk. 
  ; 
  Stegomyia 
  albopicta 
  (scutellaris) 
  ; 
  

   Cyaihomyia 
  brevipalpis, 
  Giles 
  ; 
  Toxorhynchites 
  immisericors, 
  Walk. 
  ; 
  Culex 
  halifaxi 
  ; 
  

   C. 
  fatigans 
  ; 
  Anopheles 
  rossi 
  var. 
  indefinitus. 
  

  

  (C). 
  Larvae 
  from 
  natural 
  collections 
  of 
  water 
  : 
  pools, 
  canals, 
  ditches, 
  etc. 
  : 
  — 
  

   Culex 
  fatigans, 
  C. 
  gelidus, 
  Armigeres 
  obturbans, 
  Culex 
  concolor, 
  Anopheles 
  rossi 
  var. 
  

   indefinitus, 
  A. 
  sinensis. 
  

  

  The 
  cannibal 
  larvae 
  of 
  Toxorhynchites 
  immisericors, 
  Walk., 
  were 
  here 
  frequently 
  

   encountered 
  in 
  water- 
  jars, 
  and 
  their 
  astonishing 
  voracity 
  for 
  Stegomyia 
  larvae,, 
  

   as 
  many 
  as 
  twenty-five 
  of 
  the 
  latter 
  being 
  devoured 
  in 
  a 
  single 
  night, 
  made 
  one 
  think 
  

   of 
  the 
  possibility 
  of 
  their 
  utilisation 
  in 
  Stegomyia 
  reduction. 
  In 
  Bangkok 
  through- 
  

   out 
  the 
  city 
  mosquitos 
  are 
  numerous 
  and 
  Stegomyia 
  fasciata 
  is 
  abundant. 
  The 
  

   habits 
  of 
  the 
  people 
  in 
  the 
  storage 
  of 
  water 
  and 
  the 
  restricted 
  distribution 
  of 
  the 
  

   public 
  water 
  supply 
  combine 
  to 
  make 
  the 
  task 
  of 
  its 
  reduction 
  a 
  very 
  difficult 
  one. 
  

  

  Saigon. 
  

  

  Saigon, 
  the 
  capital 
  of 
  Cochin-China, 
  is 
  situated 
  on 
  the 
  banks 
  of 
  the 
  River 
  Saigon,, 
  

   a 
  tributary 
  of 
  the 
  Donnai, 
  in 
  latitude 
  10° 
  46' 
  North 
  and 
  longitude 
  106° 
  30' 
  East. 
  

   The 
  town 
  lies 
  about 
  40 
  miles 
  up-stream 
  from 
  Cape 
  St. 
  James 
  at 
  the 
  mouth 
  of 
  the 
  

   river 
  Donnai 
  and 
  is 
  accessible 
  to 
  the 
  largest 
  steamers. 
  The 
  population 
  of 
  Saigon 
  

   is 
  about 
  70,000. 
  The 
  city 
  of 
  Cholon, 
  which 
  for 
  practical 
  purposes 
  is 
  a 
  part 
  of 
  the 
  

   port, 
  is 
  situated 
  about 
  four 
  miles 
  further 
  up-stream 
  and 
  is 
  connected 
  with 
  Saigon 
  

   by 
  a 
  steam 
  tramway. 
  Cholon 
  is 
  the 
  centre 
  of 
  much 
  commercial 
  activity 
  in 
  con- 
  

   nexion 
  with 
  the 
  milling 
  and 
  export 
  of 
  rice, 
  the 
  staple 
  product 
  of 
  Cochin-China. 
  

   The 
  population 
  of 
  Cholon 
  is 
  165,000. 
  

  

  Trade. 
  — 
  The 
  trade 
  of 
  the 
  port 
  is 
  with 
  Hong 
  Kong, 
  Singapore, 
  Manila, 
  Japan 
  

   and 
  the 
  Netherlands 
  East 
  Indies 
  by 
  direct 
  services, 
  and 
  with 
  Europe 
  by 
  way 
  of 
  

   intermediate 
  ports. 
  

  

  Temperature 
  and 
  Rainfall. 
  — 
  The 
  monthly 
  mean 
  temperature 
  is 
  above 
  80°F. 
  

   for 
  al] 
  months 
  of 
  the 
  year 
  except 
  December, 
  when 
  it 
  falls 
  slightly. 
  The 
  annual 
  

   mean 
  rainfall 
  is 
  about 
  65 
  inches. 
  The 
  rainy 
  season 
  begins 
  about 
  the 
  middle 
  of 
  

   May 
  and 
  ends 
  about 
  the 
  middle 
  of 
  November, 
  January 
  to 
  March 
  being 
  the 
  driest 
  

   months. 
  

  

  Water 
  Supply. 
  — 
  The 
  public 
  water 
  supply 
  of 
  Saigon 
  is 
  collected 
  from 
  a 
  number 
  

   of 
  surface 
  wells 
  within 
  the 
  city 
  and 
  from 
  a 
  small 
  catchment 
  area 
  about 
  two 
  miles 
  

   outside 
  it. 
  The 
  supply 
  is 
  now 
  intermittent, 
  necessitating 
  storage 
  in 
  tanks 
  or 
  jars. 
  

   A 
  plan 
  for 
  a 
  continuous 
  high 
  pressure 
  supply 
  is 
  under 
  consideration. 
  

  

  Sanitation 
  and 
  Quarantine. 
  — 
  The 
  sanitary 
  administration 
  is 
  controlled 
  by 
  the 
  

   Civic 
  Corporation 
  through 
  their 
  medical 
  officer 
  of 
  health, 
  who 
  is 
  assisted 
  by 
  sanitary 
  

   inspectors. 
  Though 
  no 
  special 
  measures 
  are 
  directed 
  against 
  mosquitos, 
  the 
  

   efficient 
  civil 
  sanitary 
  service 
  ensures 
  that 
  breeding 
  places 
  are 
  not 
  neglected. 
  

  

  The 
  quarantine 
  service 
  is 
  directed 
  by 
  the 
  Chief 
  of 
  the 
  Health 
  Service 
  of 
  Cochin 
  

   China, 
  an 
  officer 
  of 
  the 
  Sanitary 
  and 
  Medical 
  Services 
  of 
  Indo-China. 
  The 
  

   quarantine 
  station 
  is 
  situated 
  at 
  Nhabe, 
  fifteen 
  miles 
  down-stream 
  from 
  the 
  city 
  ; 
  

   the 
  buildings, 
  accommodation 
  and 
  equipment 
  are 
  excellent. 
  

  

  