302 Bangs, Birds from Western Costa Rica. [f\ k 



Islands, but specimens from Panama, Chiriqui and Costa Rica prove to 

 be the same). 



Elainea chiriquensis Lawrence is an earlier name for the species than 

 Elainea albivertex Pelz.; whether or not the latter can be maintained 

 as a southern subspecies I am not now prepared to say. 



Legatus albicollis (Vieilh). Four specimens, three males and a female, 

 Boruca, April-June. 



Myiozetetes similis superciliosus (Bonap.). Two specimens, male and 

 female, Boruca, June and July. 



Pitangus derbianus derbianus (Kaup). One adult female, Puntarenas, 

 Aug. 25. 



Myiodynastes luteiventer Bonap. One adult female, Puntarenas, August. 



Myiodynastes audax nobilis (Scl). One adult male, Boruca, May 15. 



Onychorhynchus mexicanus fraterculus Bangs. Eleven specimens, 

 adults of both sexes and one young female, Boruca, Paso Real and Pozo 

 del Rio Grande, April, May and July. 



The young female, about half grown, taken April 29, is similar in color 

 to the adults except that the throat and breast are thickly marked with 

 small black spots and the back mottled with dusky and yellowish. 



Myiobius barbatus atricauda Lawr. Seventeen adults, both sexes, 

 Boruca and Pozo del Rio Grande, April-August. 



Myiobius xanthopygus sulphureipygius (Scl). Thirty-two specimens, 

 adults of both sexes and young, Boruca, Paso Real and Pozo del Rio 

 Grande, April-August. 



Terenotriccus fulvigularis (Salv. & Godm.). Thirteen specimens, both 

 sexes, Boruca, Paso Real and Pozo del Rio Grande, April-August. 



Empidonax traillii traillii (Aud.). Two males, Boruca, April 28, and 

 Pozo del Rio Grande, Aug. 15. 



Empidonax traillii alnorum Brewster. Three females, Boruca, April 

 27, May 8 and May 15. 



Empidonax fiaviventris (Baird). Seven specimens, both sexes, Boruca 

 and Pozo del Rio Grande, April 9-May 9. 



Horizopus richardsonii sordidulus (Scl). Five adults, both sexes, Bor- 

 uca, May. 



Myiarchus nuttingi nuttingi Ridgw. One adult male, Barranca Punta- 

 renas, Aug. 15. 



Myiarchus lawrencei bangsi Nelson. Nine adults, both sexes, Boruca, 

 Pozo del Rio Grande and Lagato, April, May, June and August. 



Although these skins vary somewhat among themselves in the amount 

 of rufous edging to the tail and wing feathers, all are distinctly referable 

 to M . lawrencei bangsi differing from M. lawrencei nigricapillus in their 

 intensely black heads, greener backs and smaller bills. 



Tyrannus tyrannus tyrannus (Linn.). One adult male, Pozo del Rio 

 Grande, April 11. 



Tyrannus melancholicus satrapa (Licht.). Two adult males, Boruca, 

 April 30, and July 9. 



Muscivora tyrannus (Linn.). One male, Paso Real, July 22. 



