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FIELDIANA • ZOOLOGY

Published by CHICAGO NATURAL HISTORY MUSEUM

Volume 34 JULY 24, 1953 No. 18

A COLOMBIAN RACE OF TINAMUS OSGOODI

EMMET R. BLAKE

ASSOCIATE CURATOR, DIVISION OF BIRDS

? I 6 1953

A small collection of game birds made in Colombia by Philip Hershkovitz, Assistant Curator of Mammals in Chicago Natural History Museum, extends the ranges of several Colombian species and includes three adult specimens of an undescribed race of Tinamus osgoodi Conover, 1949. This strikingly distinct species is an addition to the Colombian fauna, having been known previously only from the Marcapata Valley, Cuzco, Peru, some 1,200 miles to the south- ward. I take pleasure in naming the Colombian representative in honor of its collector.

Tinamus osgoodi hershkovitzi subsp. nov.

Type. — Chicago Natural History Museum no. 217368, from San Adolfo, Rio Aguas Claras, Acevedo, Huila, Colombia. Altitude 1,500 meters. Adult male collected July 1, 1951, by Philip Hersh- kovitz. Original number 101.

Diagnosis. — Similar to the nominate race of the Marcapata Val- ley, Cuzco, Peru, but wing coverts and back virtually concolor, and feathers of the under tail coverts rich cinnamon medially (not ochra- ceous buff), the edgings more or less tinged with dusky, but with little or no distinct speckling, vermiculation, or barring.

Measurements. — Male adult: wing 236; culmen 34; tarsus 75. Female adults: wing 258, 247; culmen 38, 35; tarsus 78, 75.

Range. — Known from only three specimens, collected at the type locality.

Remarks. — Traylor (1952, p. 18) has shown that osgoodi is most nearly related to Tinamus tao, which ranges in Brazil south of the Amazon to Mato Grosso and to the tropical zones of eastern Bolivia, Peru, Ecuador, British Guiana, northern Venezuela, and Colombia, and to Tinamus major, which ranges from Mexico through Central ifc

America to Peru, and Mato Grosso, Brazil. It agrees closely with

No. 715 199

200 FIELDIANA: ZOOLOGY, VOLUME 34

major in wing length and with too in tarsal length. These propor- tional relationships are corroborated by the measurements of T. o. hershkovitzi.

REFERENCES

CONOVER, BOARDMAN

1949. A new species of Tinamus from Peru. Fieldiana, Zool., 31: 263-266, figs. 66, 67.

TRAYLOR, MELVIN A., JR.

1952. Notes on birds from the Marcapata Valley, Peru. Fieldiana, Zool., 34: 17-23.

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