﻿Lieut. 
  H. 
  E. 
  Barnes 
  on 
  the 
  Birds 
  of 
  Aden. 
  69 
  

  

  They 
  are 
  slightly 
  elongated 
  ovals 
  in 
  shape, 
  and 
  measure 
  0*71 
  

   inch 
  in 
  length 
  by 
  about 
  0*5 
  in 
  breadth. 
  The 
  ground-colour 
  

   is 
  white, 
  speckled 
  and 
  spotted 
  with 
  red-brown, 
  more 
  densely 
  

   so 
  at 
  the 
  large 
  end. 
  

  

  The 
  appearance 
  of 
  these 
  birds 
  is 
  not 
  confined 
  to 
  any 
  one 
  

   period 
  of 
  the 
  year 
  ; 
  I 
  find 
  from 
  my 
  notes 
  that 
  I 
  have 
  observed 
  

   them 
  in 
  May, 
  July, 
  August, 
  and 
  December. 
  

  

  18. 
  COTYLE 
  OBSOLETAj 
  Cab. 
  

  

  The 
  Pale 
  Crag-Martin 
  is 
  a 
  common 
  permanent 
  resident, 
  

   breeding 
  freely 
  in 
  the 
  caves, 
  in 
  the 
  face 
  of 
  cliffs, 
  generally 
  in 
  

   inaccessible 
  places. 
  I 
  tried 
  to 
  get 
  eggs, 
  and 
  have 
  offered 
  

   good 
  prices 
  to 
  Arab 
  and 
  Somali 
  boys 
  for 
  them, 
  but 
  without 
  

   success. 
  I 
  have 
  several 
  times 
  managed 
  to 
  climb 
  up 
  to 
  nests, 
  

   only 
  to 
  find 
  them 
  either 
  empty 
  or 
  containing 
  young. 
  On 
  

   one 
  occasion 
  only 
  was 
  I 
  rewarded 
  by 
  finding 
  an 
  addled 
  egg, 
  in 
  

   company 
  with 
  some 
  unfledged 
  nestlings. 
  This 
  egg 
  is 
  similar 
  

   to, 
  but 
  rather 
  larger 
  than, 
  the 
  egg 
  of 
  Cotyle 
  concolor. 
  

  

  They 
  seem 
  to 
  breed 
  throughout 
  the 
  year, 
  as 
  I 
  have 
  seen 
  

   nests 
  in 
  February, 
  May, 
  July, 
  and 
  October. 
  

  

  19. 
  Cypselus, 
  sp. 
  inc. 
  

  

  Swifts 
  of 
  some 
  kind 
  are 
  not 
  uncommon 
  at 
  Aden 
  ; 
  they 
  do 
  

   not 
  stay 
  any 
  length 
  of 
  time, 
  but 
  appear 
  at 
  intervals, 
  from 
  

   the 
  end 
  of 
  August 
  to 
  about 
  the 
  middle 
  of 
  October, 
  generally 
  

   after 
  roughish 
  weather 
  ; 
  I 
  have 
  not 
  seen 
  them 
  during 
  the 
  

   remaining 
  months. 
  

  

  I 
  do 
  not 
  think 
  that 
  any 
  of 
  them 
  breed 
  in 
  Aden, 
  but 
  there 
  

   are 
  many 
  places 
  between 
  Goldmore 
  Valley 
  and 
  Fisherman's 
  

   Bay 
  which 
  are 
  well 
  suited 
  to 
  them, 
  and 
  as 
  these 
  places 
  are 
  

   seldom 
  or 
  never 
  visited 
  by 
  Europeans, 
  the 
  fact 
  of 
  their 
  

   breeding 
  there 
  would 
  easily 
  escape 
  notice. 
  

  

  20. 
  Caprimulgus, 
  sp. 
  inc. 
  

  

  This 
  is 
  another 
  by 
  no 
  means 
  uncommon 
  bird 
  that 
  I 
  

   neglected 
  to 
  secure. 
  I 
  saw 
  one 
  at 
  the 
  Isthmus 
  Position 
  on 
  

   the 
  30tli 
  September. 
  I 
  turned 
  up 
  two 
  more 
  on 
  the 
  15th 
  

   October, 
  on 
  Chapel 
  Hill. 
  I 
  made 
  a 
  careful 
  search, 
  but 
  I 
  

   could 
  not 
  discover 
  either 
  eggs 
  or 
  nestlings, 
  although 
  I 
  have 
  

  

  