606 BULLETIN 203, UNITED STATES NATIONAL MUSEUM 



the nest when it was approached." Howard's (1899) first nest was 

 "on a side hill under a tuft of grass." The only nest that I have ever 

 seen was also in a branch of Ramsey Canyon ; we had previously seen 

 the bird go to the nest while building it, and on May 26, 1922, we 

 photographed (pi. 72, lower) and collected the nest with a set of four 

 fresh eggs. The nest was located on a wooded open slope, close to 

 a trail, and was in a depression in the ground at the foot of a tiny 

 oak sprout, among a litter of fallen leaves and partially under some 

 grass and other herbage, but it was not any too well hidden. It was 

 made of dead leaves, dry grasses and fine strips of inner bark of 

 cedar, and was lined with fine grass and horsehair. All of these 

 Huachuca Mountains nests were at elevations ranging from 7,000 to 

 8,500 feet. 



In the Santa Rita Mountains, Dr. Sutton (1943) found the red- 

 faced warbler nesting in the aspen copses at an elevation of about 

 8,000 feet ; a nest containing small young was found on May 29 "on 

 the ground in a low bank under aspens." 



One of the five nests of this warbler in the Thayer collection in 

 Cambridge, was taken by Virgil W. Owen in the Chiricahua Moun- 

 tains, Ariz., from the side of a bank in a narrow canyon, "in a de- 

 pression under a projecting rock, which was overhung by a bunch 

 of grass which entirely concealed both rock and nest." The main 

 body of the nest is made externally of a large number of coarse pine 

 needles and internally of grasses ; it is lined with the finest of plant 

 fibers and a quantity of reddish brown and white cow hair. Another 

 is made externally of many coarse strips from heavy weed stalks, 

 and still another was made mainly of strips of cedar bark, the latter 

 composing most of each nest. I suspect that the lining in some of 

 these nests may be deer hair, as these animals are fairly common 

 there. 



Eggs. — The red-faced warbler seems to lay three or four eggs to 

 a set. The eggs are ovate, some tending to short ovate or elongate 

 ovate, and have only a slight gloss. They are white, finely and deli- 

 cately speckled with "auburn," "Mars brown," or "snuff brown," with 

 undermarkings of "dusky drab." In general the markings are very 

 fine and few seem to be large enough to be called spots or blotches; 

 sometimes they are so light as to be almost imperceptible. The speckles 

 are frequently scattered over the entire egg, although there is usually 

 a concentration at the large end. The measurements of 44 eggs aver- 

 aged 16,5 by 12.7 millimeters; the eggs showing the four extremes 

 measure 17.9 by 13.0, 16.6 by 13.5, 14.3 by 12.2, and 15.3 by 12.0 milli- 

 meters (Harris). 



Young. — We have no information on the incubation of the eggs or on 

 the care and development of the young. 



