FAMILY PARUL1DAE 



305 



the Volcan de Chiriqui in 1870. The specimen is now in the British 

 Museum and is presumably the one to which Griscom was referring 

 when he listed "one record" for Panama (Bull. Mus. Comp. Zool., 78, 

 1935, p. 369). C. Lynn Hayward collected 3, a male and 2 females, on 

 Cerro Punta between March 6 and 14, 1962; they are now in the 

 Monte L. Bean Life Sciences Museum at Brigham Young University, 

 Provo, Utah. 



WILSONIA PUSILLA PUSILLA (Wilson) 



Muscicapa pusilla Wilson, 1811, Amer. Ornith., 3, p. 103, pi. 26, fig. 4. (Southern 

 New Jersey. ) 



Characters. — Forehead lemon chrome; upper surface darker green. 



Measurements. — Males (10 from North America, taken in May), 

 wing 53.3-56.0 (54.5), tail 44.3-49.3 (47.1), oilmen from base 9.6- 

 11.4 (10.3), tarsus 17.2-18.4 (17.8) mm. 



Females (10 from North America, taken in May), wing 50.8-55.1 

 (54.0), tail 44.0-49.4 (46.7), oilmen from base 10.1-11.4 (10.8), tarsus 

 16.1-19.5 (18.1) mm. 



Winter visitor from the north, breeding in northwestern United 

 States and eastern Canada. Fairly common in the highlands of western 

 Chiriqui. I have collected individuals of this race at El Volcan from 

 1320 to 1560 m, at Santa Clara (1080 m), and on Cerro Punta (2010 

 m). 



WILSONIA CANADENSIS (Linnaeus): Canada Warbler, 

 Reinita de Canada 



Muscicapa canadensis Linnaeus, 1766, Syst. Nat., ed. 12, 1, p. 327. (Canada.) 



Small; upper surface gray; undersurface yellow, with necklace of 

 black streaks on breast of male. 



Description. — Length 113-127 mm. Adult male, forehead to top of 

 crown black, with feathers tipped gray; rest of upper surface, includ- 

 ing wings and tail, gray; superciliary to eye and orbital ring yellow; 

 lores, auriculars, side of throat, and spots on breast black; undersur- 

 face yellow, to undertail coverts, which are white; underwing coverts 

 white. In winter upper surface tinged with olive. 



Adult female, like male, but black areas reduced, paler, or absent; 

 yellow on undersurface slightly paler. 



Measurements. — Males (10 from the breeding range, taken in May 

 and June), wing 64.0-69.5 (65.5), tail 51.2-54.6 (53.0), culmen from 

 base 10.5-12.5 (11.5), tarsus 17.4-20.0 (18.6) mm. 



