RIDGWAY ORNITHOLOGICAL CLUB. 5I 



A colony of these birds built their nests under the juncture of the 

 larger branches with the trunks of the large pines in Bear Valley, no 

 suitable cliffs being near the water. 



95. Tachycineta thalassina (Swains.). [Violet-Green 

 Swallow). Abundant everywhere during the migrations. Three 

 observed in Bear Valley in June. 



96. Phainopepla nitens (Swains.). [Pkainopepla). This 

 does not seem to be a common bird in Cohuilla Valley, only one be- 

 ing noted ; a 3, April 6th. A single bird was also observed in a 

 patch of cacti near San Bernardino, April 29th, and one near San 

 Gorgonio, May 25th. 



At Yuma they are not uncommon, several being taken, among 

 which were two young. They are very irregular in their appear- 

 ance on the west side of the mountains. 



97. Lanius ludovicianus excubitorides (Swains.). 

 ( White-runiped Shrike). Common. 



98. ViREO GILVUS (Vieill.). {Warbling Vireo). A 5 was 

 obtained on April ist in the Cohuilla Valley, where thev are only 

 migrants. One was also taken May 4th at Yuma. 



99. ViREo solitarius cassinii (Xantus). [Cassin's 

 Vireo). This species is not uncommon in the Cohuilla Valley, 



where several were taken between the 3rd and 13th of April. 



A.t Yuma it is probably only a migrant, although a 5 was taken 

 May Sth. One was also obtained in Bear Valley June 9th, where 

 they probably breed in limited numbers. 



100. ViREO BELLii PUSiLLUS (Coues). [Least Vireo). This 

 species was not common in any of the localities visited. Two were 

 noted in Cohuilla Valley; one at San Bernardino, and a few at 

 Yuma. I was fortunate enough to discover a nest at the latter place 

 May 13th. It was placed in a small bush in a thicket, was about 

 three feet from the ground, and contained three eggs, besides one 

 of Molothrus ater obscurus^ in which incubation had commenced. 



loi. ViREO viciNiOR Coues. [Gray Vireo). This species 

 was met with only in Cajon Pass, where they were not uncommon, 

 six being taken June 4th. and 5th. and another July ist. Several 

 more were also heard. 



June 4th. I found a nest and four eggs. Three of them were 

 very nearly fresh, the other had been incubated four or five days. 



The nest was built in the chaparral which thickly covers the 

 whole region, and was about four feet from the ground. It was 

 very lightly attached except on one side, but the bush in which it 



