426 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



in southern Canada to Nova Scotia, southward to south-central Texas, 

 central Louisiana, northwestern Georgia, and central South Carolina. 

 Through this vast area the bird is locally common. As the total 

 population of this race is large, it forms the great majority of those 

 that come to Panama, as indicated by the many specimens. 



MYIARCHUS FEROX PANAMENSIS Lawrence: Short-crested 

 Flycatcher, Cabezota Comun 



Myiarchus Panamcnsis Lawrence, Ann. Lye. Nat. Hist. New York, vol. 7, 

 May 1860, p. 284. (Atlantic slope of the Canal Zone near the Panama Rail- 

 road.) 



Medium size ; grayish olive above ; foreneck and breast light gray, 

 rest of lower surface yellow. 



Description. — Length 185-200 mm. Adult (sexes alike), upper 

 surface grayish olive ; feathers of crown with darker shaft lines ; 

 upper tail coverts somewhat more grayish ; tail dark grayish olive, 

 with tips of rectrices, and outer web of lateral rectrix, paler ; wings 

 dusky-olive ; lesser and middle coverts tipped widely with grayish 

 olive; tips of greater coverts indistinctly paler, whiter, inner pri- 

 maries edged narrowly with dull white ; secondaries tipped and edged 

 with grayish white ; a finely dotted white line around the eye ; lores 

 and ramal area dull gray ; throat and upper breast gray ; rest of 

 under surface light yellow ; axillars and under wing coverts yellowish 

 white, changing to yellowish olive on the sides ; inner margin of 

 under side of wings buffy white. 



Juvenile, primaries and rectrices edged widely with cinnamon- 

 rufous. 



A male, taken at Pacora, Panama. March 23, 1961, had the iris 

 wood brown ; bill black ; tarsus and toes dusky neutral gray ; claws 

 black; inside of mouth orange. Another male, from Isla Parida, 

 Golfo de Chiriqui, February 5, 1963, had the iris mouse brown ; 

 base of bill fuscous, rest black ; tarsus and toes fuscous-black ; claws 

 black. 



A female, from La Jagua, Panama, January 13, 1962, had the iris 

 wood brown ; base of mandible grayish white, rest of bill black ; tarsus 

 and toes dusky neutral gray; claws black. In another, from Las 

 Palmitas, Los Santos, January 22, 1962, the base of the mandible was 

 dull brownish white ; other colors as in the first. A third of this sex, 

 from El Llano, Panama, February 4. 1962, had the iris wood brown ; 

 bill fuscous-brown, slightly paler at the base of the mandible ; tarsus 

 and toes dusky neutral gray ; claws black. 



