﻿NOTES 
  ON 
  SOME 
  CULICIDAE 
  COLLECTED 
  IN 
  LOWER 
  MESOPOTAMIA. 
  325 
  

  

  Ochierotatus 
  dorsalis, 
  Mg. 
  

  

  This 
  mosquito 
  was 
  found 
  quite 
  commonly 
  over 
  the 
  whole 
  area, 
  both 
  adults 
  and 
  

   larvae, 
  and 
  is 
  the 
  only 
  species 
  of 
  those 
  mentioned 
  which 
  occurred 
  in 
  about 
  the 
  

   same 
  numbers 
  in 
  the 
  cultivated 
  belt 
  and 
  in 
  the 
  outlying 
  places 
  visited 
  on 
  the 
  edge 
  

   of 
  the 
  desert. 
  In 
  one 
  case 
  larvae 
  were 
  found 
  in 
  a 
  collection 
  of 
  rain-water 
  in 
  the 
  

   bottom 
  of 
  a 
  boat 
  in 
  Ashar 
  town, 
  and 
  some 
  were 
  found 
  in 
  pools 
  in 
  the 
  desert 
  at 
  

   some 
  distance 
  from 
  cultivation. 
  Adults 
  and 
  larvae 
  occurred 
  from 
  December 
  to 
  

   February. 
  

  

  Theobaldia 
  longiareolata, 
  Macq. 
  

  

  The 
  first 
  specimen 
  emerged 
  on 
  27th 
  December 
  in 
  the 
  laboratory, 
  the 
  larva 
  having 
  

   been 
  found 
  in 
  Ashar 
  area. 
  Towards 
  the 
  end 
  of 
  January 
  and 
  in 
  February 
  the 
  larvae 
  

   became 
  more 
  numerous, 
  being 
  found 
  chiefly 
  in 
  the 
  deeper 
  pools. 
  The 
  pupa 
  may 
  

   often 
  be 
  seen 
  about 
  four 
  inches 
  below 
  the 
  surface 
  of 
  the 
  water 
  and 
  appears 
  to 
  

   retain 
  that 
  position 
  by 
  gentle 
  movement, 
  remaining 
  at 
  that 
  depth 
  for 
  quite 
  a 
  long 
  

   time. 
  

  

  Theobaldia 
  annulata, 
  Schranck. 
  

  

  Larvae 
  were 
  not 
  found 
  until 
  24th 
  February 
  and 
  were 
  then 
  not 
  uncommon 
  in 
  Ashar 
  

   district. 
  

  

  The 
  adults 
  have 
  the 
  thorax 
  and 
  abdomen 
  almost 
  uniformly 
  light 
  reddish 
  brown, 
  

   with 
  very 
  little 
  trace 
  of 
  the 
  normally 
  conspicuous 
  abdominal 
  banding. 
  This 
  inter- 
  

   esting 
  colour 
  modification, 
  which 
  is 
  unaccompanied 
  by 
  any 
  structural 
  change, 
  is 
  

   no 
  doubt 
  adaptive 
  to 
  desert 
  conditions. 
  A 
  similar 
  variation 
  has 
  been 
  noticed 
  in 
  

   several 
  other 
  mosquitos. 
  

  

  Port 
  Said, 
  June 
  1919. 
  

  

  (637 
  

  

  