386 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



TYRANNUS MELANCHOLICUS CHLORONOTUS Berlepsch 



Tyranmis chloronotus Berlepsch, Ornis, vol. 14, February 1907, p. 474. (Temax, 

 Yucatan. ) 



Characters. — Lighter gray on the head and hindneck ; more greenish 

 gray on back, rump, and scapulars ; throat somewhat whiter ; upper 

 breast brighter, more yellowish olive-green. 



A male taken February 4, 1963. on Isla Parida. Golfo de Chiriqui, 

 had the iris mouse brown ; bill and claws black ; tarsus and toes 

 fuscous-black. In another, at the Candelaria Hydrographic Station 

 on the Rio Pequeni above Madden Lake, collected March 9, 1961, 

 the iris was dark mouse brown ; bill black ; tarsus, toes, and claws 

 black, with the edges of the tarsal scutes neutral gray. Two females, 

 at Puerto Armuelles, Chiriqui, January 30, 1966. had the iris dark 

 mouse brown ; bill black ; tarsus and toes fuscous-brown ; claws 

 black. 



Measurements. — Males (10 from Chiriqui, to Darien and San 

 Bias), wing 109.5-115.6 (112.9), tail 89.0-98.0 (93.2), culmen from 

 base 22.8-26.0 (24.3), tarsus 18.1-19.5 (18.5) mm. 



Females (10 from Chiriqui to Darien and San Bias), wing 108.0- 

 112.4 (109.6), tail 86.3-92.8 (90.0). culmen from base 22.9-26.3 

 (24.5), tarsus 18.0-19.1 (18.6) mm. 



Resident. Common throughout in open country in the lowlands 

 on both slopes; to 1890 meters on the western side of Volcan Baru. 

 Recorded widely through the Archipielago de las Perlas ; Taboga, and 

 adjacent islets; Cebaco and Gobernadora, in Golfo de Montijo; Isla 

 Coiba, and Isla Coibita; Canal de Afuera, Isla Parida, in Golfo de 

 Chiriqui ; Isla Escudo de Veraguas. 



While they are not known to be migratory, these flycatchers appear 

 to move readily over expanses of the sea. They are distributed 

 throughout the Archipielago de las Perlas, even on small, rocky islets, 

 wherever there are scattered trees of sufficient size to serve for look- 

 out perches, coupled with sufficient elevation above sea level to 

 afford reasonable shelter against gale force winds. In travel along 

 the International Highway from Panama City westward this is the 

 bird most commonly seen, noted constantly on elevated wires, trees, 

 or fences. It ranges regularly also along the open shores of larger 

 streams and the borders of coastal swamps. In heavily forested areas 

 it does not enter, but appears in any lowland clearing, even though 

 this may be distant from other suitable haunts. With increased settle- 

 ment and clearing of highland forests it appears to have moved up- 

 ward in the mountains of western Chiriqui. Bangs (Proc. New 



