FAMILY ICTERIDAE 



353 



122.2-137.0 (132.2), tail 87.8-94.9 (91.1), culmen from base 28.2-31.0 

 (29.6), tarsus 28.2-31.5 (29.5) mm. 



Females (8 from Darien and Colombia), wing 113.1-122.5 (118.6), 

 tail 76.0-85.2 (81.0), culmen from base 26.6-28.9 (27.9), tarsus 24.5- 

 28.5 (26.5) mm. 



Resident. Fairly common in eastern Darien, where it has been re- 

 corded from the mouth of the Rio Pinas on Bahia Pinas, Jaque, Rio 

 Jaque, Cerro Quia, and Cerro Pirre; found also in western Colombia 

 and in western Ecuador. From the somewhat scanty data, there may 

 be a gap between the range of this form and that of C. u. microrhynchus. 

 On the Rio Jaque I once found a flock of a half dozen feeding low in 

 dense growth along the river. A male that I collected at Jaque on April 

 13, 1946, was in breeding condition. 



The vocalizations of this race include a whistled teeo or keeo, with- 

 out the burry quality of the corresponding call of microrhynchus in the 

 Canal Zone (Eisenmann, in lift.). 



CACICUS HOLOSERICEUS HOLOSERICEUS (DeppeJ: Yellow-billed 

 Cacique, Charro Piquihueso 



Sturnus holosericeus W. Deppe, 1830, Preis-Verz. Saug., Vogel, etc., Mexico, 



pi. 1. (Alvarado, Veracruz, Mexico.) 

 Amblycercus holosericeus centralis Todd, 1916, Proc. Biol. Soc. Washington, 29, 



p. 95. (Rio Sicsola, Costa Rica.) 



Medium size; entirely black; bill yellowish. 



Description. — Length 202-222 mm. Adult (sexes alike), entirely 

 black. 



A male collected at El Llano, Province of Panama, on February 4, 

 1962, had the iris orange; bill light yellowish green, except the nasal 

 operculum and extreme base of maxilla on the side immediately below, 

 which are neutral gray; a narrow line of neutral gray along side of 

 mandible also; tarsus, toes, and claws neutral gray. A female taken 

 the same day was similar. 



Measurements.— Males (10 from Panama), wing 92.0-105.6 (98.8), 

 tail 88.5-101.2 (94.9), culmen from base 28.7-31.7 (30.6), tarsus 29.8- 

 33.8 (32.3) mm. 



Females (10 from Panama), wing 85.9-96.8 (90.7), tail 84.0-99.0 

 (91.4), culmen from base 25.4-29.2 (27.3), tarsus 27.1-31.8 (30.3) 

 mm. 



Resident. Locally common in thickets of wooded borders, clearings, 

 and second growth throughout the lowlands on both slopes of the main- 

 land and more irregularly found in the foothills and lower highlands. 



