222 



BIRDS OF THE REPUBLIC OF PANAMA PART 4 



outer webs edged light yellowish olive; tail olive, usually with outer 

 webs edged light yellowish olive; superciliary whitish to pale grayish 

 buff; sides of face grayish buff; thin line above superciliary, line 

 through eye, and moustachial stripe dusky; sides and flanks pale yel- 

 lowish olive to grayish olive-green; undertail coverts pale yellow; rest 

 of undersurface white; edge of wing very pale yellow; underwing co- 

 verts yellowish white, edge of inner web of primaries and secondaries 

 white on underside. 



The Black-whiskered Vireo breeds in southern Florida, the Bahamas, 

 and the islands of the Caribbean. Two races are migratory, wintering 

 in the Amazon Basin of South America. In Panama this vireo is known 

 from 3 specimens and some recent sight reports. Ridgely (1976, p. 

 285) refers to "several recent sightings in Canal Zone: One at Achiote 

 Road on September 29, 1968 (Ridgely); and one at Gatun Dam on 

 January 29, 1970 (E. S. Morton)." The specimen records are dis- 

 cussed below. 



VIREO ALTILOQUUS BARBATULUS (Cabanis) 



Phyllomanes barbatulus Cabanis, 1855, Journ. f. Ornith., 3, p. 467. (Cuba.) 



Characters. — Superciliary stripe pale and less buffy than in V. a. 

 altiloquus; throat and chest purer white. 



Measurements. — Males (10 from Florida and Cuba), wing 77.2- 

 80.1 (78.5), tail 51.1-57.7 (55.8), oilmen from base 14.7-17.1 (15.9), 

 tarsus 15.1-19.5 (17.6) mm. 



Females (9 from Cuba) , wing 72.0-78.2 (74.5) , tail 49.2-55.3 (52.4), 

 culmen from base 13.1-16.3 (15.2), tarsus 16.1-18.7 (17.5) mm. 



Accidental. This race breeds from the coast of southern Florida 

 through the Florida Keys and Dry Tortugas to the Bahamas and Cuba, 

 and winters in the Amazon Basin from northeastern Peru to north- 

 central Brazil. Hasso von Wedel collected 1 (unsexed) at Puerto 

 Obaldia, San Bias, on September 12, 1930, that Griscom (Bull. Mus. 

 Comp. Zool., vol. 72, 1932, p. 366) considered "unquestionably this 

 subspecies." The specimen is now at the Museum of Comparative 

 Zoology. Griscom (Bull. Mus. Comp. Zool., vol. 78, 1935, p. 364) 

 lists this form from the Canal Zone as well, on the basis of a specimen 

 sent to Salvin from there by McLeannan; at the time of Griscom's 

 writing that specimen had not been checked by him as to subspecies, 

 but when I examined it at the British Museum in 1958 I found that, 

 although in decidedly worn plumage, it agreed well with nominate 

 altiloquus. 



