108 University of California Publications in Zoology. |Vou.5 
way from the Mojave desert over to the Colorado desert by the 
way of Morongo pass. August 13, 1905, a lone individual of this 
species paid a visit to the peach orchard at Cushenbury springs. 
July 16 and 23, 1907, several were noted in the wash at the mouth 
of Mill creek, at the Pacific base of the mountains. 
Lanius ludovicianus gambeli Ridgway. California Shrike. 
Butcher-birds were common on the wash at the mouth of the 
Santa Ana, near Mentone, July 11, 1905; and again at the desert 
base of the mountains, at Cushenbury springs, August 10 to 14, 
several were seen. None were noted in the mountainous regions 
between these two stations. 
Vireosylva gilva swainsonii (Baird). 
Western Warbling Vireo. 
The western warbling vireo was a common species on Mill and 
Mountain Home creeks, and all along the Santa Ana canon from 
its mouth to its source at Big Meadows. <A nest containing four 
considerably-incubated eggs was found in the lower Santa Ana 
July 11, 1905. This nest was fifteen feet above the ground in 
an alder. Another nest was found in an apple tree at Clarke’s 
ranch, June 13, six feet from the ground. This contained three 
somewhat incubated eggs. Several other nests containing from 
two to four eggs were found during June along the upper Santa 
Ana, from Seven Oaks to Fish ereek. These were in cottonwoods 
varying from six to twenty feet above the ground. The nests 
were all much alike in construction, being composed externally of 
plant fibers and bleached grasses bound together with spider web 
and lined internally with fine round grass stems. One nest had 
a large amount of paper fragments woven into the walls. 
The eggs of this species are perceptibly smaller than those 
of the Cassin vireo, with the markings more minute and fewer. 
A pair of warbling vireos were seen at the South Fork cienaga, 
8500 feet altitude, June 29, 1905, which we thought had a nest 
near by. This was the highest point at which the species was 
noted. At Bluff lake a few were seen in July, 1905, and again 
the last three days in August. At Cushenbury springs several 
