474 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



Upper surface dark olive-green. (Song, recorded on the northern 

 nesting grounds, with three syllables, fee-hee-o.) 



Description. — Length 128-140 mm. Sexes alike. Above dark 

 olive-green, faintly browner on the rump and upper tail coverts ; 

 crown usually slightly darker than the back ; wings dusky brown ; 

 lesser coverts like back ; middle and greater coverts tipped with pale 

 olive-brown to pale buffy brown, forming two distinct wing bars ; 

 secondaries edged with the same color ; inner primaries bordered 

 lightly with pale bufify white ; tail dark grayish brown, with outer 

 rectrix edged with dull white, some or all of the others tipped faintly 

 with dull white ; throat white ; a band across chest, including the 

 adjacent sides, pale brownish to olive-gray ; rest of under surface, 

 including under wing coverts, white, tinged more or less with pale 

 yellow, especially in freshly molted birds. 



Measurements. — Males ( 10 from the northern breeding grounds in 

 Alaska, Montana. Athabaska, Labrador, and Maine), wing 70.3- 

 75.9 (73.8), tail 56.&-62.2 (59.3), culmen from base 13.4-15.5 

 (14.5), tarsus 16.2-16.8 (16.4) mm. 



Females (10 from the northern breeding grounds in Alaska, 

 Yukon, Mackenzie, Labrador, and Maine), wing 66.0-70.8 (68.2), 

 tail 53.7-57.6 (54.9), culmen from base 13.9-15.5 (14.6), tarsus 

 15.7-16.9 (16.2) mm. 



Passage migrant from the North. Probably fairly common, but as 

 yet known definitely in Panama from the few specimen records cited 

 below. 



From present information this flycatcher breeds from Alaska and 

 Canada, southward and eastward to New England. The earliest 

 report for Panama is a female in the Museum of Comparative 

 Zoology, taken April 11, 1904 by W. W. P)rown, Jr., on Isla Saboga 

 in the Pearl Islands. I collected a male April 14, 1947, in the valley 

 of the Rio Imamado, a tributary of the Rio Jaque, near the Colombian 

 border in southeastern Darien. Other records are of individuals in 

 migration that have landed at night on ships in the Gulf of Panama. 

 The first of these is a female that I captured May 11, 1921, at sea 

 off Punta Mala when a passenger on a Grace Line steamer en route 

 from the west coast of South America to New York via the Panama 

 Canal. Three others, sexed as females, in the collection of the Uni- 

 versity of Miami, were collected by L. Holthuis, May 8, 1967, when 

 they landed on the deck of the R. V. Pillsbury at 7° 50' N Latitude, 

 78°30' W Longitude, near the coast of eastern Darien. 



In collections made for the National Museum by M. A. Carriker, 



