118 CALIFORNIA ACADEMY OF SCIENCES. 



Truckee Reservation, June 2, 1868, male adult. Valley 

 of the Humboldt, August 31, 1867, two juveniles. 

 Utah, June, 1869, two eggs. 



Hoffman. Several specimens were seen at Camp In- 

 dependence, Cal., in August but nowhere else during 

 the expedition. 



Cooper, 1870. They seemed to be migrating north- 

 ward through the Colorado Valley early in April, and 

 on the 19th of that month I found an egg in a nest of 

 the yellow-breasted chat, showing that some of them 

 are raised in the latitude of 35 as well as northward. 



Heermann. I remarked a flock of these birds as far 

 south as Fort Tejon. 



[Variety obscurus winters on the Gulf of California at 

 Guaymas, and perhaps breeds in the Colorado Valley or 

 still farther north.] 



132. Molothrus ater obscurus (Gmel.) DWARF COW- 

 BIRD. 



I found it common in the extreme southern part of 

 Lower California, where Xantus also found it in 1859, 

 but have not seen it elsewhere in Lower California 

 and no cowbirds have ever been collected in California, 

 west of the Sierra Nevada, as far as I am aware. Nut- 

 tall, Edition 1840, p. 191, says the cow blackbird exists 

 in California. L. B. 



133. Xanthocephalus xanthocephalus (Bonap.) YEL- 

 LOW-HEADED BLACKBIRD. 



San Diego, irregular winter visitant. April 19, 1884, 

 a flock of about 1,000 in which were but three or four 

 in female plumage. L. B. 



Temecula. F. E. Blaisdell. May 4, 1883, abundant. 



San Bernardino. F. Stephens. Very rare winter 

 visitant; rare transient visitor in the valley. 



