Bulletin - United States National Museum - si-pddr - Smithsonian ...

BIRI>S OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 237
LEPIDOCOLAPTES ANGUSTIROSTRIS PRAEDATUS (Cherrie)
Picolaptes angustirostris praedatus Cherrie, Bull. Amer. Mus. Nat. Hist.,
vol. 25, May 20, 3916, p. 187. (Concepcion del Uruguay, Entre Rios,
Argentina.
)
The prebeiit subspecies, seemingly differentiated from the typical
form by greater size, longer bill, and the extension of the stripes on
head and hind neck down to the upper back, is the southernmost
representative of the species, as it ranges through the scanty wooded
areas of the northern pampas, in western Uruguay, Buenos Aires,
and in the band of forest that crosses the Territory of Pampa in
the vicinity of Victorica.
There is in the United States National Museum an old specimen
taken near Buenos Aires by the Page expedition, while I secured
two females near Victorica, Pampa, on December 24 and 27, 1920,
and an immature male at Rio Negro, Uruguay, on February 15,
1921. If the skin from Buenos Aires be considered as typical of
the form, a logical procedure, as the type came from Concepcion,
in similar country 300 kilometers to the northward, it is found that
the skins from Victorica have a shorter wing, are grayer, and that
one has a much longer bill. (The mandibles in the second skin
from Victorica are imperfect.) The last are placed with praedatus
on the basis of size of bill, and because they agree with praedatus
in the extension of the head and neck streaks over the upper back.
The specimen from Eio Negro, Uruguay, is only recently from the
nest, and its bill is short and undeveloped. It is darker above, more
blackish on the head, and more heavily streaked below than the
others. Pertinent measurements, in millimeters, of these four skins
are as follows
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