FAMILY TYRANNIDAE 563 



The population on Isla Coiba follows the general rule for resident 

 birds on this large isolated island in having a tendency toward dark 

 coloration. This seems too slight, however, in the series of 12 speci- 

 mens examined, to warrant a name as it is duplicated in part of the 

 mainland series. 



Griscom, in his Ornithology of Panama (Bull. Mus. Comp. Zool., 

 vol 78, 1935, p. 353), through an oversight, in addition to his note 

 under M. v. accola, lists also "Elaenia viridicata pollens (Bangs)," 

 a name used formerly for the bird of Panama, restricted now to the 

 slightly different subspecies of northern Colombia. 



The race M. v. accola ranges north from western Panama through 

 Costa Rica to Nicaragua. 



MYIOPAGIS GAIMARDII MACILVAINII (Lawrence): 

 Forest Elaenia, Monona Montaraz 



Elainea macilvainii Lawrence, Ann. Lye. Nat. Hist. New York, vol. 10, 1871, 

 p. 10. (Cartagena, Bolivar, Colombia.) 



Small ; slightly crested ; similar to the Greenish Elaenia, but slightly 

 smaller, and with yellow (not orange) crest, and two definite wing 

 bars. 



Description. — Length 112-125 mm. Adult (sexes alike), crown 

 grayish brown to olive, with a large, partly concealed central patch 

 of light yellow, whiter anteriorly, tipped distally with grayish brown; 

 back and scapulars rather light greenish olive ; rump and upper tail 

 coverts faintly paler ; wings dusky ; middle coverts and greater coverts 

 tipped with pale yellowish olive to dull white, forming two usually 

 well-marked wing bars ; primaries edged with olive, secondaries more 

 prominently with olive-yellow ; tail hair brown or olive, edged broadly 

 with greenish olive, tipped faintly with pale brown (a mark that 

 disappears with wear); a dusky loral spot; an indefinite grayish 

 white line from upper lores across upper eyelid to back of eye ; a 

 similar narrow line on lower eyelid ; auricular area grayish olive with 

 paler shaft lines ; malar region and upper throat whitish, marked very 

 faintly with spots and shaft lines of grayish olive ; lower foreneck, 

 breast, and upper sides rather dull pale gray, lined faintly with 

 edgings of pale yellow ; abdomen, under tail coverts, and flanks pale 

 yellow ; axillars and under wing coverts light yellow ; edgings on 

 inner webs of wing feathers somewhat paler. 



Juvenile, crown light brownish olive without central yellow patch ; 

 back and scapulars duller, more brownish olive-green. 



A male, taken at La Jagua, Panama, January 14, 1962, had the iris 

 dark brown ; base of mandible dull brownish white ; rest of bill 



