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 12 THE CONDOR VoL. XI line, and twelve miles east of the Utah line. The Dolores cuts across the west end' of the county in a northerly course, and there are a few other flowing streams tributary to each of the larger ones, and numerous dry channels and gulches which occasionally have water. On this mesa are large tracts of cedar or juniper (Sabina ulahensis), and pition woods, with equally great or greater open spaces covered with sagebrush (Artemisia). The carlons of the rivers have cottonwoods, wild cherries, and other deciduous trees and shrubs, while on their slopes are often scrub oaks. At the lower elevations, along the Dolores River, there is much greasewood (Sarcobatus) and rabbit brush (Chrysothamnus sp.), the latter often taller than a man, and with large woody stems. The rocks exposed in the carlons of the San Miguel and its tributaries are a light grayish sandstone, while along the Dolores, and in both the East and West Paradox Valleys, the country rock is a red sandstone. The soil over almost the whole district is of a reddish color, which has apparently had some co. ' 5, /5   ' MAP OF PORYION OF WESYERN COLORADO; YE SADED AREA IS THE REGION COVERED BY THIS PAPER Copied by permission from a map copyright by Clason Map Co., Denver water birds during the miations, and the occurrences effect on the colors of two or three species of mam- mals. A considerable portion of the mesa land is under cul- tivation, the necessary water being supplied by ditches brought from the mountains. Aside from these ditches, there is prac- tically no water on the mesa, and the fauna and flora are of the desert types. Bird life is thus rather lacking in variety here. In the stream valleys, where there are deciduous trees and shrubbery, there is of course a greater variety, but unfortunately this por- tion was the least worked. There are some reservoirs, mostly small, for water storage, and these attract noted of these birds were practically all about these reservoirs. In 1906 I spent the last two weeks of April at Coventry. Mr. iI. F. Gilman publisht a few of the notes I took then in "Some Birds of Southwest Colorado", in Tu Cor)oR, Vol. IX, No. 5; but nothing has been omitted here because of that, for it is desirable that these notes be complete in themselves. In 1908 I spent the first and last weeks of April at Coventry, and the intervening time at Bedrock, 40 miles west on the Dolores River, where the East and West Paradox Valleys join it, at an elevation of 5150 feet: no doubt a good place for a bird man in May and June, but I was after mice and sich, and did not stay for the birds. It should be stated that Mr. Smith has done but little bird collecting, and his notes are largely from ocular observations, but we have gone thru the list carefully and cut out everything about which there is the least doubt.