BIRDS FROM COSTA RICA—WETMORE 61 
breeding season in El Salvador, which will be an interesting point 
to check in studies in Guanacaste. 
MYIARCHUS TUBERCULIFER NIGRICAPILLUS Cabanis 
Myiarchus nigricapillus CaBanis, Journ. fiir Orn., 1861, p. 250 (Bonilla, Costa 
Rica). 
At the Hacienda Santa Maria I shot three males of this flycatcher 
on November 5, 10, and 14. The birds were found scattered singly 
through the coffee plantation immediately back of the house and at 
the edge of the forest. The call is a whistled whee sometimes slightly 
trilled. 
The three taken are clearly representative of the dark-headed 
nigricapillus, which ranges through eastern and central Costa Rica, 
here entering the edge of Guanacaste through the influence of the 
heavy forest on the slopes of Volcin Rincén de la Vieja. 
EMPIDONAX FLAVIVENTRIS (W. M. Baird and S. F. Baird): Yellow-bellied Flycatcher 
Tyrannula flaviventris W. M. Bartrp and S. F. Barrp, Proc. Acad. Nat. Sci. 
Philadelphia, vol. 1, Sept. 18, 1848, p. 288 (Carlisle, Pa.). 
Near the Rio Colorado, northwest of Liberia, I secured two on 
October 20. One of these is in molt on the body and is decidedly 
brighter yellow than the other. 
MYIOCHANES VIRENS (Linnaeus): Eastern Wood Pewee 
Muscicapa virens LINNAEUS, Systema naturae, ed. 12, vol. 1, 1766, p. 327 (South 
Carolina). 
On October 20 near Liberia, I shot one in an open-limbed tree 
growing at the edge of a pasture. The bird was eating a yellow 
butterfly. 
MYIOCHANES RICHARDSONII RICHARDSONII (Swainsen): Western Wood Pewee 
Tyrannula richardsonii Swainson, Fauna Boreali-Americana, vol. 2, 1831 (1832), 
p. 146, pl. 46, lower fig. (Cumberland House, Saskatchewan). 
A female taken on October 30 comes from Liberia. The wing 
measures 82.8 mm. and the tail 64.7 mm. 
MYIOCHANES RICHARDSONII SORDIDULUS (Sclater) 
Contopus sordidulus P. L. Sctarmr, Proce. Zool. Soc. London, May 1859, p. 48 
(Orizaba, Veracruz). 
As four of the six wood pewees taken at Liberia late in October 
are this form, the Mexican wood pewee would appear to be the com- 
monest of the three kinds that are present here as migrants. They 
were found along open trails in the woods bordering streams, or 
on open perches in clearings. On one occasion while I was storm- 
bound by a heavy rain with shelter in an old hut one hawked steadily 
for insects from an exposed perch unmindful of the downpour. Meas- 
