426 BIRDS OF THE REPUBLIC OF PANAMA PART 4 



questionable. It is more probable that these birds were among those 

 collected at Chepo in eastern Province of Panama, where Arce was 

 located for several months on his arrival in Panama to collect for 

 Salvin. The Smithsonian has a specimen attributed to Arce labeled 

 "Veragua" that was received from the dealer Boucard for which the 

 locality given must also be considered erroneous. 



TANGARA GYROLA (Linnaeus): Bay-headed Tanager, 

 Tangaro Cabecibayo 



Fringilla Gyrola Linnaeus, 1758, Syst. Nat., ed. 10, 1, p. 181. (Surinam.) 



Small; head reddish brown; upper surface bright green, with patch 

 of bright blue on rump; undersurface bright blue. 



Description. — Length 124-130 mm. Adult male, crown, sides of 

 head, and chin reddish brown, with narrow band of brownish yellow 

 on rear of crown; upper surface except for rump glossy green; rump 

 bright blue near royal blue; lesser wing coverts rich yellow; other wing 

 coverts yellowish green; remiges blackish with outer web edged green, 

 narrowly on primaries, very broadly on secondaries; central pair of 

 rectrices green, others, except for outer pair, which is entirely blackish, 

 edged green on outer web; undersurface same blue as rump, except for 

 abdomen and undertail coverts, which are green; thighs tawny red; 

 underwing coverts gray. 



Adult female, like male, but blue of undersurface is paler. 



Immature, duller than female; head green, with a few brown feathers. 



Juvenile, undersurface also green. 



The Bay-headed Tanager is common in forest and forest borders in 

 the foothills and lower highlands of both slopes. In Chiriqui and the 

 Canal Zone area it also ranges into the lowlands. I have often seen it 

 in groups of tanagers foraging high in trees; it also comes low down 

 to feed on berry-bearing shrubs. Of 2 collected by E. A. Goldman at 

 Cana, Darien, 1 contained 36 seeds of a Bourreria 30%, 2 seeds not 

 determined 10%, a mass of bright brownish red fruit pulp 60%; the 

 other had bits of a staphylinid 2% and remains of drupes with many 

 seeds in fiber not determined 98%. Five collected by Strauch (Bull. 

 Brit. Orn. Club, 1977, p. 65) weighed from 23.8 to 25.2 g. The song 

 of this species is a series of four or five whining notes, descending in 

 pitch; the call note is a monosyllable of the same quality. 



Two races of T. gyrola are found in Panama: bangsi, which extends 

 from Costa Rica to western Panama as far east as Code, and deleticia 



