﻿Description 
  of 
  a 
  new 
  species 
  of 
  Tyrannus. 
  By 
  George 
  N. 
  

  

  Lawrence. 
  Read 
  June 
  §d, 
  1850. 
  

   Tyrannus 
  Cassinii. 
  

   Cassin's 
  Tyrant 
  Flycatcher. 
  Plate 
  III. 
  fig. 
  2. 
  

  

  Specific 
  character 
  — 
  Head 
  and 
  breast 
  bluish 
  ash 
  ; 
  crown 
  

   orange 
  red 
  ; 
  abdomen 
  yellow 
  ; 
  tail 
  feathers 
  with 
  very 
  broad 
  

   webs. 
  

  

  Adult 
  male 
  — 
  Bill 
  black, 
  base 
  of 
  the 
  lower 
  mandible 
  dark 
  

   horn 
  color 
  ; 
  head 
  and 
  neck 
  bluish 
  ash 
  ; 
  a 
  bright 
  orange 
  red 
  

   spot 
  on 
  the 
  top 
  of 
  the 
  head, 
  back 
  ash 
  grey, 
  tinged 
  with 
  yel- 
  

   lowish 
  green; 
  wings 
  umber 
  brown, 
  the 
  secondaries 
  lightly 
  

   margined 
  with 
  yellowish 
  green 
  ; 
  wing 
  coverts 
  and 
  tertials 
  of 
  a 
  

   lighter 
  brown 
  and 
  edged 
  with 
  dull 
  white 
  ; 
  bend 
  of 
  the 
  wing 
  

   and 
  under 
  wing 
  coverts 
  yellow; 
  upper 
  tail 
  coverts 
  and 
  tail 
  

   brownish 
  black, 
  the 
  tips 
  of 
  all 
  the 
  tail 
  feathers 
  and 
  the 
  outer 
  

   webs 
  of 
  the 
  exterior 
  ones 
  light 
  cinereous 
  brown 
  ; 
  throat 
  white, 
  

   fore 
  part 
  of 
  neck 
  pale 
  bluish 
  ash, 
  breast 
  and 
  sides 
  of 
  the 
  

   same 
  color 
  intermixed 
  with 
  greenish 
  yellow; 
  abdomen 
  bright 
  

   yellow 
  ; 
  lower 
  tail 
  coverts 
  pale 
  yellow 
  ; 
  legs 
  and 
  feet 
  brown. 
  

   The 
  five 
  outer 
  primaries 
  abruptly 
  attenuated, 
  the 
  first 
  shorter 
  

   than 
  the 
  sixth 
  ; 
  the 
  second, 
  third, 
  fourth 
  and 
  fifth 
  nearly 
  

   equal 
  ; 
  tail 
  even. 
  

  

  Length 
  about 
  9 
  inches 
  ; 
  bill 
  from 
  base 
  ' 
  in. 
  ; 
  wing 
  from 
  

   flexure 
  5\ 
  in. 
  ; 
  tail 
  41 
  in. 
  ; 
  tarsus 
  4 
  in. 
  

  

  The 
  specimen 
  herein 
  described 
  was 
  obtained 
  in 
  Texas 
  : 
  

   the 
  only 
  other 
  example 
  that 
  I 
  have 
  seen 
  is 
  in 
  the 
  Museum 
  of 
  

   the 
  Acad, 
  of 
  Nat. 
  Sci., 
  Phila. 
  ; 
  it 
  was 
  in 
  the 
  Rivoli 
  collection, 
  

   purchased 
  at 
  Paris 
  by 
  Dr. 
  T. 
  B. 
  Wilson, 
  and 
  came 
  erroneously 
  

   labelled 
  " 
  Tyrannus 
  verticalis." 
  

  

  Of 
  the 
  particular 
  habits 
  of 
  this 
  species 
  I 
  can 
  give 
  no 
  in- 
  

   formation. 
  

  

  