62 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 9 
urements of the four taken are as follows: One male, October 25, wing 
82.5, tail 58.8 mm.; three females, October 22 and 24, wing 78.3, 80.5, 
80.5, tail 57.2, 60.4, 61.3 mm. The race is marked from the typical 
form by darker color above, and by shorter tail. The birds seen were 
silent. 
MYIOBIUS SULPHUREIPYGIUS AUREATUS Bangs 
Myiobius xanthopygus aureatus Banes, Proc. New England Zoél. Club, vol. 4, 
Mar. 19, 1908, p. 27 (Divala, Chiriqui, Panam4). 
In the section called Los Cuadros on the Hacienda Santa Maria 
I shot two females of this flycatcher on November 6. They were 
found in heavy forest, where they sought low perches from which to 
watch for insects. In mannerisms they were much like Empidonaz. 
ONYCHORHYNCHUS MEXICANUS FRATERCULUS Bangs 
Onychonhyneius mexicanus fraterculus Banes, Proc. New England Zoél. Club, vol. 
3, Mar. 31, 1902, p. 86 (Santa Marta, Colombia). 
The only one of these flycatchers seen was a male taken in a shaded 
thicket south of Liberia October 31. The region was one of pastures 
interspersed with little thickets and groves of trees. 
' PLATYRINCHUS CANCROMINUS Sclater and Salvin 
Platyrhynchus cancrominus ScuaTER and SAtvin, Proc. Zool. Soc. London, 1860, 
p. 299 (Choctum, Vera Paz, Guatemala). 
My only specimen of this flycatcher is a male taken low down in 
heavy brush where there was dense shadow in a damp spot on the Rio 
Blanco, just above its junction with the Rio Colorado, northwest of 
Liberia. This bird does not differ as far as I can see from a series from 
Guatemala and México. 
TOLMOMYIAS SULPHURESCENS CINEREICEPS (P. L. Sclater) 
Cyclorhynchus cinereiceps P. L. Scuater, Ibis, 1859, p. 448 (State of Oaxaca, 
México). 
In the vicinity of Liberia, both along the Rio Liberia and in the 
brushy pastures to the south, as well as at the Rio Colorado, these 
flycatchers were so common that I secured a series of 10 between 
October 23 and November 18. They were found in heavy forest, 
low thickets, or scattered groves of brush in pature lands, where they 
moved slowly through the smaller branches, reminding me of vireos in 
their manner of peering about. At this season they were silent. The 
iris is yellowish white and the mouth lining dark neutral gray. 
Several of those taken were molting. 
RHYNCHOCYCLUS BREVIROSTRIS BREVIROSTRIS (Cabanis) 
Cyclorhynchus brevirostris CABANIS, Arch. fiir Naturg., vol. 13, 1847, p. 249 
(Jalapa, Veracruz, México). 
On November 5 I shot a male of the short-billed flycatcher on the 
