FAMILY FRINGILLIDAE 



60 1 



ARREMON AURANTIIROSTRIS RUFIDORSALIS Cassin 



Arremon rufidorsalis Cassin 1865, Proc. Acad. Nat. Sci. Philadelphia, p. 170. 

 (Turrialba, Costa Rica.) 



Characters. — Green of upper surface somewhat darker than in other 

 Panama races; superciliary entirely white, not shaded with gray in 

 rear portion as in other races; flanks olive-green, not gray. 



Measurements. — Males (8 from Bocas del Toro and Costa Rica), 

 wing 73.1-80.0 (77.1), tail 61.5-73.2 (66.2), oilmen from base 16.0- 



16.7 (16.4), tarsus 25.2-28.2 (26.4) mm. 



Females (7 from Bocas del Toro, Costa Rica, and Nicaragua) wing 

 73.1-78.0 (75.8), tail 61.8-65.5 (63.6), culmen from base 15.3-17.2 

 (16.2), tarsus 24.8-27.5 (26.5) mm. 



Resident. Fairly common in the Almirante Bay region of Bocas del 

 Toro, where it has been collected on the Boquete Trail and at Guabo 

 and Cricamola (Peters, Bull. Mus. Comp. Zool., vol. 71, 1931, p. 339), 

 at Almirante, and at 720 m on the Rio Changuena. 



ARREMON AURANTIIROSTRIS AURANTIIROSTRIS Lafresnaye 



Arremon aurantiirostris Lafresnaye, 1847, Rev. Zool. [Paris], 10, p. 72. (Panama.) 



Characters. — Upper surface yellowish green, lighter than in A. a. 

 rufidorsalis or A-. a. strict ocollaris; bend of wing yellow, without 

 tinge of orange as in strict ocollaris. 



A male collected at Puerto Armuelles, Chiriqui, on February 2, 1966, 

 had the iris very dark brown; bill reddish orange; tarsus dull light 

 brown; toes and claws dull brown. 



Measurements. — Males (10 from Panama), wing 74.0-81.0 (77.5), 

 tail 61.3-71.4 (67.7), culmen from base 15.8-17.7 (16.7), tarsus 24.7- 



26.8 (25.9) mm. 



Females (10 from Panama), wing 70.5-76.8 (72.8), tail 53.6-62.8 

 (61.1), culmen from base 14.8-17.9 (16.2), tarsus 23.1-28.3 (25.2) 

 mm. 



Resident. Fairly common in humid areas on the Pacific slope from 

 the Costa Rican border to at least Cerro Azul, eastern Province of Pan- 

 ama, and on the Caribbean slope from Veraguas east to Mandinga, 

 San Bias. In Chiriqui, it has been collected at El Volcan, San Felix, 

 and Divala, but in recent years forest destruction in this province has 

 probably reduced the number of places where it may be found. 



In Panama this species seems to nest from May to October. On May 

 28, 1953, 1 collected a female at Sona, Veraguas, that had an egg ready 

 to lay. Salvin (Salvin and Godman, Biol. Centr.-Amer., Aves, vol. 1, 



