286 



BIRDS OF THE REPUBLIC OF PANAMA PART 4 



Panamanian specimens of this race: 4 were collected in the Chiriqm 

 highlands, 1 at Almirante, Bocas del Toro, and 1 each from Isla Cebaco 

 and Isla Gobernadora in the Golfo de Montijo off the Pacific Coast of 

 Veraguas. 



SEIURUS AUROCAPILLUS FURVIOR Batchelder 



Seiurus aurocapillus furvior Batchelder, 1918, Proc. New England Zool. Club, 6, 

 p. 81. (Near Deer Pond, Newfoundland.) 



Characters. — Upper surface browner than in nominate race; streak- 

 ing on undersurface heavier and blacker; flanks darker. 



Measurements. — Males (10 from the breeding range, taken in May, 

 June, and July), wing 76.5-82.0 (79.0), tail 54.6-58.1 (56.7), culmen 

 from base 12.5-15.5 (14.0), tarsus 20.9-23.2 (21.8) mm. 



No specimens of females were available for measurement. 



Migrant and winter visitor from the north. This very weakly dif- 

 ferentiated race breeds exclusively in Newfoundland, Canada. Pan- 

 ama appears to be the southern limit of its winter range. At least 2 

 specimens in the collections of the Smithsonian from Panama have been 

 identified as furvior: 1 taken October 18, 1962, at Almirante, Bocas 

 del Toro, and the other taken March 10, 1952, at Chilar, Colon. 



SEIURUS NOVEBORACENSIS (Gmelin): Northern Waterthrush, 

 Reinita Arrollera del Norte 



Motacilla noveboracensis Gmelin, 1789, Syst. Nat., 1(2), p. 958. (Louisiana and 

 New York.) 



Small; upper surface olive; undersurface yellowish, streaked with 

 olive. 



Description. — Length 121-138 mm. Adult (sexes alike), upper sur- 

 face, including wings and tail, olive; superciliary, broken eye-ring, and 

 sometimes stripe on forehead, buffy white; side of face and stripe 

 through eye olive; throat white, rest of undersurface buffy yellow, 

 streaked olive except on center of abdomen; underwing coverts light 

 olive-brown. 



Measurements. — Males (10 from Panama), wing 68.8-77.9 (74.8), 

 tail 46.8-54.7 (51.3), culmen from base 12.0-14.1 (13.2), tarsus 19.4- 

 21.8 (21.1) mm. 



Females (10 from Panama), wing 69.5-75.0 (71.6), tail 45.1-53.1 

 (49.4), culmen from base 12.0-13.9 (13.1), tarsus 19.8-22.1 (20.7) 

 mm. 



Migrant and winter visitor from the north. Very common through- 



