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 110 THE CONDOR Vol. XV The nests, with one exception, have been placed on horizontal limbs of a dis- rance of froin five to fifteen feet out frond the trunk of the tree, and from seven to thirty feet high. On July 15, 19o 7, a nest containing young just hatched was found placed about seven feet up, and in, next to the body of a small, gnarly, dead spruce, with the stub of a limb and a few small twigs the only support. In all cases the nests have been composed of the same materials, and alike in structure. From a hasty glance they seem light and flimsy; bnt as a matter of fact, they are quite compact. The small under platform does not exceed much in size the nest proper, or heavy lining, and is built of the small dead twigs of the too:retain ma- ple, xvillow, or pine, according to location. On top of this is placed coarse weeds and straws, into which is worked a fine, wire-like weed, of the pre.,vious year's growth, until finally the lining proper consists of this weed altogether. It is quite remarkable how dense and well conformed this stiff and brittle wire-like weed becomes. Of course at the time the nest material is gathered it is still damp, and flexible; for it is secured frond the few spots here and there that are bared of the snow on the sunny exposures. Invariably the nesting site chosen is in a lone tree on the edge of the timber, on or near the point of a monntain always having a good outlook. The earliest date of the finding of a completed nest is May 25, the latest July 1. The laying of eggs is commenced from two to ten days from the tinde when the nest is completed. Three seems to be the common complement; in. one in- stance, only, was a nest found containing four young. The earliest date of the finding of young in the nest is July 12, then about three days old. The latest date is August 2o, with young ready to fly. Upon inquiry at several of the mines which continue work throughout the entire winter, we are told that this Grosbeak is a constant resident. The elevation of these mines varies from 7,000 ro ,5oo feet. NOTES ON SOME MESA COUNTY, COLORADO, BIRDS By EDWARD R. WARREN HE LAST of April and first half of May, 1912, I spent in western Mesa County, Colorado, collecting. Some birds not before recorded from the County were collected, and some observations made on other. species are herewith recorded. The only list we have of Mesa County birds is Rockwell's "Annotated List of the Birds of Mesa County, Colorado," in TE ComoR, July, 19o8. The first portion of my time was spent at Mmck, ten miles east of the Utah line, and the latter part at the Sieber Ranch, on Little Dolores Creek, twen- ty miles westward from Grand Junction. Tyrannus vertioalis. Arkansas Kingbird. First seen near Mack, April 26, and others the first week in May. Also seen at Sieber Ranch May I2, and com- mon in the town at Grand Junction, May 5-6. Tyraxmus vociferans. Cassin Kingbird. Common at Sieber Ranch May o- 14, decidedly outnumbering the preceding species at this place. I have men- rioned these two species, as my friend Rockwell seemed a little in doubt about their' relative abundance and distribution, and any additional records will help clear the matter up. le, mpidonax griseus. Gray Flycatcher. Two were collected near Mack, April 24 and 26, and one at the Sieber Ranch, May lO, the first record for the County.