94 



Basin. A male specimen was accidentally destroyed, 

 but a breeding female, taken on April 12, has a 

 culmen of only 13 mm., or 1 mm. shorter than the 

 minimum among twenty-two females from the lower 

 Colorado Valley (Grinnell, op. cit., 160). 



87. Xanthocephalus xanthocephalus. Yellow-headed 



Blackbird. — First observed on my second trip to the 

 Hardy River, where, on April 26, great flocks of 

 Yellow-headed Blackbirds, associated with Red-wings, 

 filled the vegetation above the newly flooded country 

 near Volcano Lake. 



88. Agelaius phoeniceus sonoriensis. Sonora Red-wing. — 



Flocks of Red-winged Blackbirds were common along 

 the Hardy during the latter part of April. I collected 

 none, but Stone has identified Rhoads's specimens as 

 this form, after comparing them with skins of A. p. 

 neutralis. Grinnell's birds from the Colorado Valley 

 . are likewise referable to sonoriensis. 



Neither this bird nor the preceding species was seen 

 in the Pat tie Basin, or at any other point away from 

 the bottom-land of the river. 



89. Sturnella neglecta. Western Meadowlark. — Seen 



only in the cultivated country in the Mexican portion 

 of the Imperial Valley, where they were very abundant 

 and in full song. Rhoads obtained several specimens 

 at the mouth of the Hardy, but writes, ''A rare bird 

 except in open savannas along the Hardy River at two 

 or three points." 



90. Icterus ciicullatus nelsoni. Arizona Hooded Oriole. — 



Observed sparingly in the Wash Association on the 

 western slopes of Pattie Basin, particularly in the 

 vicinity of the butte called the Caparote. At least 

 six males were seen here on April 12. 



91. Euphagus cyanocephalus. Brewer's Blackbird. — ''Al- 



ways abundant near human habitations" (Rhoads). 



92. Carpodacus mexicanus frontalis. California Linnet. 



— Rhoads observed small flocks in the foothills, and 

 collected three on Cocopah Mayor. 



