NO. Q BIRDS OF ISLA COIBA, PANAMA—WETMORE 103 
Oryzoborus funereus that show traces of chestnut on the abdomen, 
recording such skins from Guatemala, Honduras, Canal Zone, and the 
Santa Marta region, Colombia. Traces of this color are found in 
skins in the U.S. National Museum from Veraguas, Panama, and 
Bolivar, Magdalena, and Santander, Colombia, as additional localities 
to those mentioned. Because of this the author cited places funereus 
as a race of Oryzoborus angolensis in which the male has the lower 
breast, abdomen, and sides solid chestnut. It seems to me preferable 
to interpret the occasional occurrence of this chestnut marking in 
funereus as a deep-seated character that indicates ancient relation- 
ship to angolensis through some common ancestral stem, since it 
occurs at random and is not restricted to the area where the two 
styles of color pattern are in contact. It must be remembered 
also that males of funereus in first plumage vary from clay color to 
tawny olive and sayal brown on the lower surface, pigmentation 
which might affect the normal black of the adult dress in occasional 
instances. 
ARREMONOPS CONIROSTRIS (Bonaparte): Green-backed Sparrow, 
Chen-chen 
Arremon comirostris BONAPARTE, Conspectus generum avium, vol. 1, pt. 2, 
(late in) 1850, p. 488. (Colombia.) 
While this common sparrow lived in thickets near the beaches and 
at the borders of the swampy lowland forests, it ranged also inland 
Fic. 15.—Green-backed Sparrow, Chen-chen. 
