﻿88 
  Dr. 
  R. 
  W. 
  Shufeldt 
  on 
  

  

  Here 
  we 
  see 
  an 
  entire 
  divergence 
  in 
  food, 
  in 
  methods 
  of 
  

   securing 
  it^ 
  and 
  of 
  percliing, 
  quite 
  as 
  different 
  as 
  in 
  any 
  two 
  

   other 
  groups 
  of 
  carinate 
  birds, 
  however 
  remotely 
  related 
  they 
  

   may 
  be 
  : 
  for 
  example, 
  the 
  Kingfishers 
  and 
  the 
  Parrots. 
  Every 
  

   ornithologist 
  is 
  aware 
  how 
  utterly 
  different 
  is 
  the 
  flight 
  of 
  a 
  

   typical 
  Swift 
  and 
  a 
  Humming-bird, 
  and 
  even 
  Cones 
  has 
  said 
  

   of 
  the 
  Common 
  Chimney 
  Swift 
  (^Ch(Etura 
  pelagica) 
  , 
  '^Like 
  

   the 
  Swallows, 
  which 
  this 
  bird 
  so 
  curiously 
  resembles,, 
  not 
  

   only 
  in 
  its 
  form, 
  but 
  in 
  its 
  mode 
  of 
  flight, 
  its 
  food, 
  and 
  twit- 
  

   tering 
  notes, 
  it 
  has 
  mostly 
  forsaken 
  the 
  ways 
  of 
  its 
  ancestors, 
  

   who 
  bred 
  in 
  hollow 
  trees, 
  and 
  now 
  places 
  its 
  curious 
  open- 
  

   work 
  nest, 
  of 
  bits 
  of 
  twig 
  glued 
  together 
  with 
  saliva, 
  inside 
  

   disused 
  chimneys, 
  in 
  settled 
  parts 
  of 
  the 
  country'''"^. 
  To 
  

   this 
  I 
  should 
  add 
  that 
  these 
  Swifts 
  not 
  only 
  " 
  curiously 
  re- 
  

   semble 
  '' 
  Swallows 
  in 
  those 
  particulars, 
  but 
  are 
  absolutely 
  

   like 
  them, 
  and 
  had 
  not 
  my 
  friend 
  been 
  blinded 
  by 
  the 
  idea 
  

   of 
  Cypselo-trochilidine 
  affinities, 
  he 
  would 
  have 
  thought 
  like- 
  

   wise. 
  How 
  is 
  it 
  that 
  he 
  did 
  not 
  attempt 
  to 
  compare 
  such 
  

   Swallow-like 
  characters 
  in 
  a 
  Swift 
  with 
  what 
  he 
  might 
  

   find 
  in 
  a 
  Humming-bird 
  ? 
  Simply 
  because 
  the 
  latter 
  do 
  

   not 
  have 
  themf. 
  

  

  Among 
  special 
  Habits 
  we 
  note 
  that 
  in 
  — 
  

  

  Cypseli. 
  Teochili. 
  

  

  6, 
  Nearly 
  all 
  species 
  of 
  the 
  sub- 
  6. 
  All 
  species 
  of 
  the 
  suborder 
  

   order 
  nest 
  and 
  roost, 
  often 
  in 
  thou- 
  known 
  to 
  me 
  nest 
  apart 
  in 
  pairs, 
  

   sands, 
  in 
  caves, 
  fissures 
  iu 
  clitfs, 
  and 
  roost 
  separately 
  in 
  the 
  trees 
  or 
  

   hollow 
  trees, 
  disused 
  chimneys, 
  or 
  shrubberies. 
  These 
  birds 
  are 
  never 
  

   similar 
  places. 
  seen 
  in 
  '■'■ 
  Jlocks,^'' 
  except 
  when 
  their 
  

  

  great 
  abundance 
  makes 
  this 
  appear 
  

   to 
  be 
  the 
  case. 
  

  

  7. 
  The 
  habits 
  of 
  nidification, 
  the 
  number 
  of 
  eggs, 
  the 
  manner 
  of 
  rearing 
  

   the 
  young, 
  and 
  all 
  such 
  matters 
  are 
  all 
  things 
  so 
  well 
  known 
  in 
  the 
  

   Swifts 
  and 
  Humming-birds, 
  and 
  yet 
  at 
  the 
  same 
  time 
  so 
  absolutely, 
  

  

  * 
  Op. 
  cit. 
  p. 
  457. 
  

  

  t 
  Iu 
  the 
  same 
  place 
  Coues 
  also 
  says 
  of 
  the 
  Chimney 
  Swift, 
  and 
  it 
  

   applies 
  to 
  many 
  other 
  species, 
  I 
  suppose, 
  " 
  So 
  great 
  are 
  the 
  volatorial 
  

   powers 
  of 
  this 
  bird 
  that 
  the 
  sexes 
  can 
  come 
  together 
  on 
  the 
  wing 
  " 
  [!]. 
  

   Let 
  me 
  ask 
  Dr. 
  Coues 
  : 
  Is 
  that 
  not 
  the 
  normal 
  mode 
  of 
  copulation 
  in 
  

   Chadura, 
  and 
  has 
  he 
  ever 
  seen 
  the 
  act 
  performed 
  in 
  that 
  manner 
  among 
  

   any 
  of 
  the 
  Tvochili 
  ? 
  

  

  