FAMILY TYRANNIDAE 439 



and Costa Rica), wing 82.3-86.7 (84.2), tail 62.2-68.5 (65.2), cul- 

 men from base 22.8-25.7 (24.6), tarsus 23.6-25.7 (24.7) mm. 



Resident. Locally fairly common on both Pacific and Caribbean 

 slopes in the Tropical Zone, less commonly in the Subtropical Zone 

 to 1250 meters, rarely to 1650 meters, from near the Costa Rican 

 boundary in Chiriqui and Bocas del Toro east to Veraguas (Santa Fe 

 and the Calovevora area), and both western and eastern sides of the 

 Azuero Peninsula ; Isla Coiba ; Isla Parida, Golfo de Chiriqui. 



The only Attila seen from Isla Coiba, a male taken January 22, 

 1956, is definitely greenish on the back, but has the crown heavily 

 streaked and is large in size (wing 91.8 mm). One from Isla Parida, 

 to the west in the Golfo de Chiriqui, also large (wing 92.5 mm), is 

 slightly intermediate but is almost like the mainland bird. On the 

 basis of this limited material both are assigned to the race citrcopyga. 



A female taken near El Volcan, February 27, 1965, had a fully 

 formed egg in the oviduct ( broken so that it could not be saved) . The 

 markings resembled those of the eggs described beyond under A. s. 

 sclateri. 



In an account of this subspecies in Costa Rica, Skutch (Ibis, 1971, 

 pp. 316-322 ) recorded it as "one of the rarer followers of army ants." 

 One came down from the high tree tops to perches 5 or 6 meters from 

 the ground above the moving ant swarm. From such vantage points 

 it swooped down to seize flying insects flushed by the ants or crawling 

 on the tree trunks. A nest with four young was found in the Carib- 

 bean lowlands on April 12, 1967, hidden behind the base of a sapling 

 growing from the buttressed base of a tall tree. The following year, 

 on March 13, a new nest on the same site held four eggs "pale pinkish 

 buff to dull white, heavily marked, especially on the thicker end, with 

 large and small spots of bright cinnamon-rufous, brown of varying 

 shades, and pale lilac." These eggs measured 23.0 X 18.9, 22.6 X 18.4, 

 23.2 X 18.7, and 23.0 X 18.6 mm. Incubation was by the female alone, 

 but the young later were fed by both parents. The food included 

 many small lizards and frogs, with a few insects. 



ATTILA SPADICEUS SCLATERI Lawrence 



Attila Sclateri Lawrence, Ann. Lye. Nat. Hist. New York, vol. 7, 1862, p. 470. 

 (Lion Hill, Panama Railroad, Atlantic Slope, Canal Zone, Panama.) 



Ch-aracters. — On average, more greenish, less brown on back ; 

 crown somewhat less heavily streaked ; rump and upper tail coverts 

 more yellow; size slightly smaller. (Occasional reddish brown, darker 

 birds may be immature individuals in first postjuvenal plumage.) 



