Fig. 1. A map of the Yucatán Peninsula of Mexico showing localities referred to in the text.
Pueblo Nuevo X-can.—Lat. 21° 52′ N, long. 87° 26′ W, elevation 10 meters. A village five kilometers east of X-can, Yucatán, in rainforest with dense underbrush. Specimens were obtained from the immediate vicinity of the village.
Puerto Juárez.—Lat. 21° 10′ N, long. 86° 49′ W, sea level. A small port on the Caribbean Coast with alternating sand beach and limestone shore. Mangrove swamps extend a short distance inland at various points. Specimens were collected in rainforestlike vegetation at a small cenote, in low deciduous forest, and at our camp along a large, cleared airstrip four kilometers west-southwest of the village.
Yucatán
Pisté.—Lat. 20° 42′ N, long. 88° 28′ W, elevation 10 meters. A village in dense, low deciduous forest with many nearby milpas. Collections were made in a wide area in the vicinity of the village, including nearby Chichén-Itzá.
Sisal.—Lat. 21° 10′ N, long. 90° 00′ W, sea level. A small village on the north-western coast of the peninsula. Collections were made on the beach, in the low scrub vegetation behind the beach, and in the mangrove swamps and nearly-dry lagoons further inland, from three to 13 kilometers west-southwest of the village.
ANNOTATED LIST OF SPECIES
Catalogue numbers in the following accounts are those of the Museum of Natural History, The University of Kansas. With the exception of a synoptic collection presented to the Departamento de la Fauna Silvestre, Dirección General de Caza, México, D.F., all of the specimens mentioned are in the museum at the University of Kansas.
Unless otherwise indicated, specimens taken were not molting. For birds undergoing postnuptial or postjuvenal molt, the degree of advancement of the molt is indicated by the numbers of primaries and rectrices that are new or partly ensheathed. Information on the condition of the testes refers to the left testis unless otherwise noted.
Scientific and vernacular names follow Friedmann et al. (1950) and Miller et al. (1957) except for specimens of species or genera that have been more thoroughly treated systematically since the publication of the Mexican Checklist, for example, Columbina, Centurus and Platypsaris, by Johnston (1962), Selander and Giller (1963), and Webster (1963), respectively. The trinomial is used whenever subspecific identities could be made with a reasonable degree of certainty. The specimens of several kinds were in extremely worn plumage or in molt and meaningful judgments concerning such characters as relative darkness or paleness of plumages could not be made.