FAMILY TYRANNIDAE 397 



MYIODYNASTES MACULATUS INSOLENS Ridgway 



Myiodynastcs andax insolens Ridgway, Man. N. Amer. Birds, September 1887, 

 p. 332. (Mirador. Veracruz, Mexico.) 



Characters. — Darker above ; crown more olive, less biifif ; back more 

 olive. 



Measurcnients. — Males (9 from Mexico, Guatemala, Honduras), 

 wing 111.4-116.7 (114.1), tail 81.2-85.4 (83.3). culmen from base 

 24.4-27.8 (25.6), tarsus 19.0-20.8 (20.0) mm. 



Females (7 from Mexico, Guatemala), wing 106.1-110.5 (108.4), 

 tail 74.8-81.0 (78.7), culmen from base 24.2-26.7 (25.2), tarsus 

 19.5-22.8 (21.1) mm. 



Passage migrant. Known at present in Panama from specimens 

 collected in western Chiriqui ( Puerto Armuelles ) , southern Veraguas 

 (Rio San Lorenzo), Canal Zone (Lion Hill), Darien (Cerro Sapo) ; 

 and Isla Coiba. 



The first report of this form in the Republic is that of Bangs and 

 Barbour (Bull. Mus. Comp. Zool., vol. 65. 1922, p. 220) who, in re- 

 cording an adult female of the species taken on the slopes of Cerro 

 Sapo, Darien, April 24, 1922, say of it that it "agrees in all of the 

 distinguishing characters, longer wing (109 mm); olive not cinna- 

 momeus pileum . . . with M. m. insolens Ridgway of southeast 

 Mexico if that form were migratory." As this migration was not 

 suspected at the time, they recorded it under the name nobilis, the 

 name then current for the population of the Isthmus. 



In the collection of the U.S. National Museum there are two, a 

 male and a female, taken by E. A. Goldman April 11, 1911, at the 

 old Lion Hill locality in the Rio Chagres Valley of the Canal Zone, 

 now submerged in Gatun Lake. In addition, in more recent work I 

 have collected the following examples : two males on Isla Coiba, 

 February 1 and 2, 1956; two males in Chiriqui, one at the lakes near 

 El Volcan, February 15, I960, and the other at the head of the Rio 

 San Bartolo, near the Costa Rican boundary west of Puerto Ar- 

 muelles, Chiriqui, March 1, 1966. A male in the American Museum 

 of Natural History came from near the mouth of the Rio San 

 Lorenzo, southern Veraguas, taken by Griscom April 6, 1924. 



This race is recorded as nesting, or as present in the nesting season, 

 south to northeastern Guatemala in Peten (Nueva Agua, Tikal), 

 northern British Honduras (Gallon Jug), and central Honduras 

 (Lancetilla, La Lima, Lake Yojoa). (There appear to be no records 

 as yet for Nicaragua.) 



