FAMILY VIREONIDAE 



237 



Measurements. — Males (7 from Darien, and Colombia), wing 53.0- 

 61.8 (58.2), tail 38.0-46.3 (42.6), oilmen from base 13.2-16.8 (14.5, 

 average of 6), tarsus 15.5-16.7 (16.4) mm. 



Females (5 from Darien and Colombia), wing 50.5-55.9 (54.2), tail 

 40.2-43.4 (41.5), culmen from base 12.7-13.9 (13.2), tarsus 15.1-16.3 

 (15.9) mm. 



Resident. This race is known in Panama from extreme eastern 

 Darien and San Bias. The Smithsonian has specimens from Darien 

 taken at Jaque, Cerro Pirre, Cana, and Tacarcuna Village. Bangs and 

 Barbour (Bull. Mus. Comp. Zool., vol. 65, 1922, p. 223) mention 3 

 collected at Mt. Sapo. Hasso von Wedel collected 2 females in San 

 Bias at Obaldia and Ranchon that Griscom (Bull. Mus. Comp. Zool., 

 vol. 72, 1932, p. 366) says "agree with three specimens from Mt. Sapo 

 on the Pacific slope of Darien, but are perhaps a trifle less yellow below." 

 These locations are very close to Armila, where I collected a pair that 

 are definitely referable to nelsoni, but as the Smithsonian also has speci- 

 mens of bulunensis from the nearby Gulf of Uruba on the Caribbean 

 coast of Colombia, it is possible that extreme eastern San Bias is an 

 area where the two forms meet. In the Gorgas Memorial Laboratory 

 collection are specimens taken on Cerro Quia, southeastern Darien, 

 March 17, 1971, at 500 and 700 m. 



E. A. Goldman examined the stomachs of 2 collected at Cana on 

 June 6, 1912: 1 contained a locustid 25%, caterpillar remains (4 at 

 least) 25%, 7 fragmentary ants 20%, 2 or more spiders including a 

 ball of web 30%; the other contained a moth 8%, a lepidopterous co- 

 coon 20%, ant remains 20%, arachnid remains 20%, a roach 32%. 



HYLOPHILUS FLAVIPES Lafresnaye: Scrub Greenlet, 

 Verdecillo Rastrojero 



Figure 21 



Hylophilus flavipes Lafresnaye, 1845, Rev. Zool. [Paris], 8, p. 342. ("Bogota," 

 Colombia.) 



Small; entire upper surface yellowish olive; throat grayish; breast 

 greenish yellow; rest of undersurface yellow. 



Description. — Length 105-117 mm. Adult (sexes alike), upper sur- 

 face from crown to tail yellowish olive; wing coverts and secondaries 

 yellowish olive; primaries blackish with outer webs edged yellowish 

 olive; side of head light gray; chin dull white; throat and upper breast 

 light yellowish olive, fading to light yellow on rest of undersurface. 



This species is found in the Tropical Zone from southwestern Costa 

 Rica to the lower Rio Bayano, Province of Panama; it appears again 



