394 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



Rica), wing 107.1-111.0 (109.6). tail 75.7-82.2 (78.1). culmen from 

 base 22.3-25.5 (23.9), tarsus 18.1-19.8 (19.1) mm. 



Passage migrant ; fairly common, mainly in September-October 

 and March-April. 



The nominate race nests from central Tamaulipas (Victoria), 

 northeastern Xuevo Leon, and Sinaloa south locally through Central 

 America to central Costa Rica (Gulf of Nicoya and the central high- 

 lands), and winters apparently in Peru. While, as stated above, in 

 the general account of the species, these birds have been recorded 

 most frequently in the Canal Zone, in their migrations they may 

 appear anywhere in the Tropical Zone throughout the Republic. 



Definite records for the nominate race, based on specimens, are 

 as follows: Veraguas — Santa Fe. March 17, 1925; El Villano, Sep- 

 tember 17, 1924; Caleta Caiman, western end of Isla Cebaco. March 

 28, 1962. Los Santos— Los Santos, March 15, 1948. Province of 

 Panama— Charco del Toro, Rio Maje. March 20, 24. 28, 1950 (4 

 specimens). Darien — Cerro Sapo, Jesucito. April 1922 (3 adults). 

 Bocas del Toro — Almirante, September 19. 1961. Canal Zone — 

 Empire Range, October 3, 1955 ; K-6 Road, September 14, 1955. 

 Comarca de San IMas — Puerto Obaldia, November 20, 1930. 



MYIODYNASTES LUTEIVENTRIS VICINIOR Cory 



Miodynastcs lutcivcntris vicinior Cory, Field Mus. Nat. Hist., Orn. Ser., vol. 1, 



no. 10, August 30, 1916, p. 342. (Yurimaguas, Peru.) 

 Myiodynastes luteiventris swarthi van Rossem, Condor, vol. 29, no. 2, March 15, 



1927, p. 126. (Huachuca Mountains, Arizona.) 



Characters. — Under surface paler, yellowish white, with the dark 

 streaks narrower ; light streaking on back lighter, grayer, paler buff ; 

 cinnamon-rufous of upper tail coverts and tail faintly paler. 



Measurements. — Males (10 from Arizona, Mexico, and Guate- 

 mala), wing 111.5-118.2 (115.1), tail 77.0-85.0 (80.6), culmen from 

 base 23.2-26.0 (24.6). tarsus 19.5-22.3 (20.1) mm. 



Females (5 from Arizona and Colima, Mexico), wing 101.5-110.3 

 (106.5). tail 74.0-81.0 (76.8). culmen from base 21.2-24.9 (23.5), 

 tarsus 19.4-20.7 (19.9) mm. 



Transient from the north, fall and spring. 



Definite records are as follows: Canal Zone (probably Lion Hill 

 Station on the Panama Railroad), collected in 1862, by McLeannan ; 

 Fort Clayton, October 13. 1953, F. S. Blanton. 



This subspecies nests from southeastern Arizona ( Santa Rita and 

 Chiricahua Mountains) south in northern Mexico to the mountains 



