^ G? /o 
Vol. 45, pp. 167-168 September 27, 1932 
OF THB 
BIOLOGICAL SOCIETY OF i^ASHINQTPN 
NEW BIRDS FROM CHIRIQUI PROVINCE, PANAMA. 
BY M. E. McLELLAN DAVIDSON. 
A preliminary study of the material resulting from field work 
conducted on behalf of the California Academy of Sciences in 
Chiriqui Province, Panama, between 1929 and 1932, reveals 
the existence of several new birds, three of which are described 
below. 
Automolus Xanthippe, sp. nov. 
Type. — No. 33,220, Collection California Academy of Sciences, adult 
female; Barriles (4200 feet), Chiriqui, Panama, January 28, 1931; M. E. 
Davidson. 
Description. — Forehead, crown, occiput, outer aspect of wing, and 
central rectrices Bay, in marked contrast to the Raw Umber of the scapulars, 
interscapulars, and rump ; upper tail-coverts and lateral retrices Chestnut ; 
feathers of the lores Cinnamon-Buff lightly tipped with black; indistinct 
supra-auricular stripe inclining to Cinnamon-Brown, auriculars shghtly 
darker, but with pale Cinnamon-Buff mesial streaks; the Ochraceous- 
Tawny of the chin and throat passing into Clay Color on the center of the 
abdomen and into Chestnut on the longer under tail-coverts; sides and 
flanks Saccardo's Umber; axillars, Hning of wing, and inner margins of 
remiges Ochraceous-Tawny; maxilla and contiguous area of mandible 
dark horn color, remainder of mandible pale straw color. Wing, 85.0 mm. ; 
tail, 77.5; length of culmen, 28.2; depth of bill at gonydial angle, 8.0; 
tarsus, 26.0; middle toe, 22.5. 
Remarks. — Only the one specimen of Automolus Xanthippe is extant, but 
in the coloration of the crown, wing, tail, and throat, as well as in the 
much heavier bill, and longer tarsus and middle toe, the new species is 
distinguished from Automolus ochroloemus exsertus, to which it is most nearly 
aUied. The contrasting wings and back differentiate it from Automolus 
jumosus. 
Spodiornis barrilesensis, sp. nov. 
Type. — No. 33,413, Collection California Academy of Sciences, adult 
male; Barriles (4500 feet), Chiriqui, Panama, January 28, 1931; M. E. 
Davidson. 
47— Proc. Biol. Soc. Wash., Vol. 45, 1932. (167) 
168 Proceedings of the Biological Society of Washington. 
Description. — Above, including tail and lesser wing-coverts, uniform 
Dark Neutral Gray; remainder of wing feathers externally black, 
margined with Deep Neutral Gray; under surface, together with under 
wing-coverts and axillars, Deep Neutral Gray, becoming sHghtly paler on 
lower abdomen and under tail-coverts, the latter narrowly margined with 
white; line along commissure on maxilla and mandible pale horn color, 
the remainder of bill dark horn color. Wing, 71.0 mm.; tail, 48.0; length 
of culmen, 16.0; breadth of bill at base, 7.0; tarsus, 18.0; middle toe, 13.0. 
Remarks. — In coloration Spodiornis harrilesensis is identical with S. j. 
jardinii, within the range of which the type locality of the new species 
lies, but the form and size of the bill absolutely separate the two species. 
The bill of S. harrilesensis is not only longer and basally deeper than in 
S. j. jardinii, but it also has a greater breadth at base, the mandible being 
quite tumid. The nasal fossae of S. harrilesensis are conspicuously deeper 
and the nares decidedly larger than those in S. j. jardinii. In these latter 
particulars the new species approaches Acanthidops hairdi, but the charac- 
teristic concavity of the culmen of A. hairdi is absent and the whole bill is 
much heavier. It would seem, however, that a very close relationship 
between Acanthidops and Spodiornis is indicated in the characters exhibited 
by S. harrilesensis. The wing formula of Spodiornis harrilesensis is the same 
as that of S. jardinii. 
Hylophilus viridiflavus pallescens, subsp. nov. 
Type. — No. 32,909, Collection California Academy of Sciences, adult 
male; near Concepcion (1500 feet), Chiriqui, Panama, December 6, 1929; 
M. E. Davidson. 
Suhspecific characters. — Similar to H. v. viridiflavus, but paler and duller, 
Olive-Citrine above, slightly grayer on the head; below pale Straw Yellow, 
becoming grayish white on throat, the breast washed with deep Olive Buff; 
under wing-coverts and inner edgings of the remiges pale straw yellow. 
Measurements. — Male (type): wing, 56.5 mm.; tail, 50.5; culmen, 12.5; 
tarsus, 18.5. Female: wing, 56.5; tail, 49.0; culmen, 13.0; tarsus, 18.5. 
Range. — Southwestern Costa Rica to western Chiriqui. 
Remarks. — The two Concepcion birds are readily distinguishable by 
their color characters from two males of H. v. viridiflavus in the collection 
of the California Academy of Sciences, one secured near San Felix and the 
other taken near the base of Cerro Flores, Chiriqui, Panama. These latter 
examples conform very closely to Lawrence's description of the type from 
the Panama Railroad, Panama. A series of ^. viridiflavus from Buenos 
Aires and Pozo Azul, Costa Rica, shows that a certain amount of individual 
variation exists, but that undoubtedly these birds may be ascribed to the 
new subspecies. 
I am indebted to Dr. Frank M. Chapman, American Museum of Natural 
History, and to Mr. W. E. Clyde Todd, Carnegie Museum, for the loan of 
specimens used in the preparation of this paper. The opportunity to 
examine pertinent material in the collections of the U. S. National Museum 
and the Museum of Comparative Zoology is also greatly appreciated.