FAMILY VIREONIDAE 



231 



A male collected March 9, 1963, at Armila, San Bias, had the iris 

 mouse brown; maxilla fuscous-black; mandible neutral gray; tarsus, 

 toes, and claws bluish neutral gray. 



M easurements.— Males (10 from Province of Panama), wing 50.1- 

 53.7 (51.7), tail 31.2-33.7 (33.2), oilmen from base 11.4-13.8 (12.8), 

 tarsus 15.1-16.9 (15.6) mm. 



Females (10 from Province of Panama and Darien), wing 47.0-52.8 

 (48.7), tail 26.1-35.4 (32.0), culmen from base 11.6-13.7 (12.6), tarsus 

 15.1-16.9 (16.0) mm. 



Resident. Common and widespread in forest and second growth of 

 eastern Panama, found in Darien as high as 1000 m on Mount Sapo 

 and 1200 m on Cerro Pirre. This race is also found in Colombia south 

 on the Pacific Coast to Dagua Valley, and the upper Sinu and middle 

 Magdalena Valleys. The Smithsonian collection includes specimens of 

 "pure" darienensis from as far west as Utive, on the Rio Colobre, in 

 the Province of Panama, and also from Chepo, Chiman, and Cerro 

 Chucanti farther east in that Province. The collection also includes 

 birds from Armila, San Bias, and Jaque, Cana, and Tacarcuna Village 

 in Darien. 



Griscom (Amer. Mus. Novit. no. 282, 1927, pp. 7-8), when describ- 

 ing this race wrote that in habits and song it is like decurtatus. Two 

 stomachs from Cana examined by E. A. Goldman held only insects: 

 one had 3 ants 10%, caterpillar skin 10%, a large pale colored blattid 

 80%; the other had bits of a hymenopteran 2%, a small moth with 4 

 eggs 8%, a caterpillar 10%, bits of a small elaterid 5%, a small curcu- 

 lionid 5%, a beetle 5%, other coleopteran remains 5%, 3 pale colored 

 blattids (with 1 egg case) 60%. 



On February 22, 1950, I shot 3 Lesser Greenlets from a flock of 8 

 or 9 at Chiman; of these, 2 were barely grown. Nothing, however, is 

 known of the breeding biology of this race. 



HYLOPHILUS AURANTIIFRONS AURANTIIFRONS Lawrence: 

 Golden-fronted Greenlet, Verdecillo Frontidorado 



Hylophilus aurantiifrons Lawrence, 1862, Ann. Lyc. Nat. Hist. New York, 7 

 (1861), p. 324. (Atlantic slope near Panama Railroad, hereby restricted to 

 Frijoles, Canal Zone.) 



Very small; forehead brownish yellow fusing into brown crown; 

 rest of upper surface yellowish olive-green; throat whitish; rest of 

 undersurface light yellow. 



Description. — Length 98-107 mm. Adult (sexes alike), forehead 

 yellow and olive-ocher, fusing into light olive-brown of crown; rest 



