FAMILY PARULIDAE 



293 



Powell (in lift, to Eisenmann) took a female immature (skull unossi- 

 fied) on October 19, 1966, at Ft. Sherman that weighed 11 g. 



OPORORNIS TOLMIEI TOLMIEI (Townsend): MacGillivray's 

 Warbler, Reinita de Tupidero 



Sylvia Tolmiei J.K. Townsend, 1839 (Apr.), Narr. Journey Rocky Mountains, 

 etc. p. 343. (Fort Vancouver, Clarke County, Washington.) 



Small; head, throat, and chest slate gray; upper surface yellowish 

 olive; undersurface yellow. 



Description.— Length 114-127 mm. Adult male, crown and nape 

 slate gray; rest of upper surface, including tail, yellowish olive; pri- 

 maries dusky, with outer web edged yellowish olive; rest of wing yel- 

 lowish olive; lores black; broken eye-ring white; sides of throat and 

 upper breast light gray; center of throat and chest black, with most 

 feathers tipped white; sides and flanks light yellowish olive; rest of 

 undersurface, bend of wing and underwing coverts yellow. 



Adult female, like male, but crown grayish olive; throat whitish, 

 tinged gray; upper breast light grayish olive. 



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

 and June), wing 57.0-61.9 (59.4), tail 50.0-53.5 (51.9), culmen from 

 base 10.5-11.2 (10.8), tarsus 18.2-21.2 (20.1) mm. 



Females (10 from the breeding range, taken in June and July), 

 wing 55.0-61.0 (56.4), tail 46.5-52.4 (49.5), culmen from base 10.6- 

 12.0 (11.2), tarsus 18.8-21.1 (19.9) mm. 



Winter visitor from the north. Uncommon, recorded only from 

 Chiriqui and the Canal Zone. In Chiriqui, the MacGillivray's Warbler 

 is known mainly from the highlands, where Monniche collected it at 

 the Volcan de Chiriqui between 1590 and 1800 m (Blake, Fieldiana: 

 Zool., vol. 36, no. 5, 1958, pp. 559-560) (Phillips [Birds of Arizona, 

 1964, p. 159] believes some of Monniche's specimens assigned to tolmiei 

 are referable to O. Philadelphia). W. W. Brown, Jr., found it at 

 Boquete at 1200 m (Bangs, Proc. New England Zool. Club, vol. 3, 

 1902, p. 61). The British Museum has a male and female collected by 

 Arce labeled " Chiriqui" and "Volcan de Chiriqui." The California 

 Academy of Sciences has 2 specimens identified as tolmiei collected at 

 Barriles (1350 m, near El Volcan), Chiriqui on January 21 and Feb- 

 ruary 4, 1931, and a male from the lowlands at Puerto Armuelles, 

 taken November 7, 1929. My only encounter with this species was at 

 El Volcan, where on February 12, 1955, 1 collected a male in low growth 

 along a small quebrada running through a pasture still thick with felled 

 tree trunks. 



