FAMILY PARULIDAE 



275 



mid- September until mid- April; most are found between late Septem- 

 ber and late March. Buskirk et al. (Auk, 1972, p. 619), in studying 

 mixed-species flocks at Cerro Punta, Chiriqui, considered D. virens a 

 "joiner" but not a follower of the flocks led by permanent residents. I 

 have often seen them in the flocks of migrant warblers. They are 

 usually found in second-growth woodland, borders, and clearings. 



[DENDROICA OCCIDENTALS (Townsend): Hermit Warbler, 

 Reinita Coronada 



Sylvia occidcntalis J.K. Townsend, 1837, Journ. Acad. Nat. Sci. Philadelphia, 7, 

 p. 190. (Forests of Columbia River.) 



This species is included on the basis of several recent sight reports. 

 An adult male was seen at Nueva Suiza in the highlands of western 

 Chiriqui on December 22, 1973, by Dana Gardner and again in the exact 

 same locality on January 15, 1974, by Ridgely and C. Leahy (Ridgely, 

 1976. p. 296) . In 1976 an adult male was seen again at this locality on 

 January 15-16 (J. J. Pujals) and March 6 (J. Greenberg) (Eisen- 

 mann, Ridgely in lift.). The normal winter range is from Mexico to 

 Nicaragua.] 



DENDROICA CERULEA (Wilson): Cerulean Warbler, Reinita Cerulea 



Sylvia cerulea Wilson, 1810, Amer. Ornith., 2, p. 141, pi. 17, fig. 5. (Philadelphia, 

 Pennsylvania.) 



Small: upper surface light blue (male) or bluish green (female); 

 undersurf ace white or tinged yellow. 



Description. — Length 101-112 mm. Adult male, upper surface gray- 

 ish blue, brighter on crown; a few fine black streaks on hindneck and 

 back; rump light gray; upper tail coverts black, tipped light gray; les- 

 ser wing coverts black, tipped blue; middle and greater wing coverts 

 black, tipped white, forming two bars; remiges black, with outer web 

 edged gray; rectrices black, with white on inner web extensive on outer 

 pair, decreasing to a thin edge on innermost pair, and outer webs edged 

 blue; black line from lores through eye; side of face light gray; under- 

 surface white with narrow black band across upper breast and fine black 

 streaks on sides. 



Adult female, crown bluish green; side of face and rest of upper 

 surface light bluish olive-green, slightly lighter on rump; lesser wing 

 coverts light green; middle and greater w r ing coverts black, tipped 

 whitish, forming two bars; remiges black with outer web edged bluish 

 olive-green and inner web edged white; rectrices as in male but blue 



