Nelson North American Mainland Myiarchus. 45 



General notes. Birds from Honduras, Nicaragua and Costa Rica, of 

 which I have examined a considerable number, agree closely in size and 

 color. The Hondurus birds, however, average a little smaller than 

 those from Costa Rica. There is the usual variation in amount of ru 

 fous edgings to outer borders of wings and tail. 



Myiarchus lawrencei bangsi subsp. nov. 



BANGS 'S FLYCATCHEK. 



Type. No. 8758, adult male, Collection of E. A. and O. Bangs. From 

 Boquete, Panama. Collected January 26, 1901, by W. W. Brown, Jr. 



Breeding range. Panama. Not migratory. 



Zonal distribution. Humid Tropical. 



Subspecific characters. Crown intensely black; back greenish; inner 

 webs of tail feathers without buffy borders. 



Description of fresh plumage. Crown intensely black; back dark 

 greenish olive; upper tail coverts dark hair brown slightly edged with 

 dull russet; tail bordered externally with dull russet; inner webs of tail 

 feathers plain dusky; wing coverts bordered with isabella color lightly 

 edged with cinnamon; tertials narrowly edged with grayish white; pri 

 maries (except two outer ones) finely edged with russet; secondaries 

 more broadly edged with same; chin, throat and breast dull ashy or 

 olive gray; abdomen and under tail coverts between a rich primrose yel 

 low and sulphur yellow. 



Measurements. Adult male (type): Wing, 84; tail, 81; culmen, 15.5; 

 tarsus, 21. 



Adult female (topotype): Wing, 78.5; tail, 73; culmen, 16; tarsus, 20. 



General notes. The intensely black crown and greener back serve to 

 distinguish the present form from any of the other subspecies of M. 

 lawrencei. The tail is also blacker and less bordered with rufous than in 

 nigricapillus, and the bill appreciably smaller. The two specimens from 

 Boquete are the only ones I have seen of M. I. bangsi, but they are so 

 different from the numerous specimens of nigricapillus at hand that I 

 have no doubt of their representing another subspecies. Citations of 

 nigricapillus from Panama undoubtedly refer to the present bird. 



Myiarchus lawrencei platyrhynchus (Ridgway). 



COZUMBL FLYCATCHER. 



1885. Myiarchus platyrhynchus Ridgway, Proc. Biol. Soc. Wash., Ill, p. 

 23. February 26, 1885. 



Type locality. Cozumel Island, off coast of Yucatan. Type No. 

 102,738 U. S. National Museum (skinned from alcohol and much decol 

 orized). 



