Nelson North American Mainland Myiarchus. 29 



Myiarchus ferox panamensis (Lawrence). 



PANAMA FLYCATCHER, 



1860. Myiarchus panamensis Lawrence, Ann. Lye. Nat. Hist. N. Y. 

 VII, p. 284. May, 1860. 



Type locality. Lion Hill, Panama. Type in American Museum of 

 Natural History (Lawrence collection). 



Breeding range. From nearly or quite to the southern border of Costa 

 Rica (specimens examined from David, Chiriqui) through Panama 

 (including San Miguel Island) into northern Columbia at least to Santa 

 Marta. Not migratory. 



Zonal distribution. Humid Tropical. 



Subspecific characters. Larger than ferox; upper parts paler, more 

 greenish olive. 



Description of fresh plumage. Crown olive, usually a little darker than 

 back but often the same color; back greenish olive; upper tail coverts 

 vary from hair brown to broccoli brown; tail coverts and outer webs of 

 tail feathers edged with drab or Isabella color; outer web of outer tail 

 feather hair brown or drab, distinctly paler than inner web: rest of tail 

 feathers plain dusky, slightly paler at tip; wing coverts, edges of 

 secondaries and tertials hair brown (palest on tertials) and commonly 

 tinged with slight shade of greenish; chin, throat and breast, ash gray; 

 abdomen and under tail coverts sulphur yellow. 



Measurements. Averages of seven adult males from Panama and 

 Chiriqui: Wing, 93.1 (87-96); tail, 90.3 (85-93); culmen, 19.1 (18-20); 

 tarsus, 23.4 (22.5-24.5). 



Averages of five adult females from Panama and Chiriqui: Wing, 

 91 (89-93); tail, 89 (87-91); culmen, 19.4 (18-21); tarsus, 23.7(23-24.5). 



General Notes. My iarclius ferox was described from Cayenne, Guiana, 

 and the few specimens at hand from that and adjacent sections of South 

 America appear to show that it is smaller with a smaller bill than pana 

 mensis, and the upper parts browner and less greenish. Birds from 

 Chiriqui average a little larger than those from Panama. The series in 

 the Bangs Collection from San Miguel Island, Panama, are not distin 

 guishable from mainland birds in the same condition of plumage. Like 

 M. nigriceps the present species is South American and only enters the 

 area included within the limits of this paper at the northern extremity 

 of its range. It has no near relative in North America. 



Myiarchus crinitus (Linnaeus). 



GREAT CRESTED FLYCATCHER. 



1766. Muscicapa crinita Linnaeus, Syst. Nat., I, 12th ed., p. 325. Based 

 on the Muscicapa cristata, ventre luteo of Catesby, Car. I, p. 52, 

 t. 52. 



Type locality. Catesby says "It breeds in Carolina and Virginia" and 



