132 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



witli cream color ; all the tail feathers tipped with bro\viiish white. Another 

 adult male taken on December 15, at Triunfo, is similar, but less brownish or 

 olivaceous on the head, neck, and under parts. 



Young female (Xo. 16, 496, Triunfo, December 7). Differing from the spring 

 female in having the entire upper parts more olivaceous ; the lower parts yel- 

 lower ; the greater and middle coverts, as well as the inner secondaries, more 

 broadlv tinged with white ; the base of the upper mandible flesh colored to a 

 little beyond (i. e., anterior to) the nostril. 



This Oriole occurs throughout Lower California, where it is a much com- 

 moner bird than the preceding species. Mr. Bryant has found it on Santa Mar- 

 garita Island in January, and Mr. Frazar took a few specimens at La Paz in 

 February, and others at Triunfo in December. The latter observer believes, 

 however, that by far the greater number leave the Peninsula before winter, 

 " returning about the middle of March." He saw only one individual on the 

 Sierra de la Laguna, but observed many in the canons at its base. The species 

 was most numerously represented about Triunfo where it frequented trees near 

 water, and began nest building late in June. The first eggs, a set of four, were 

 found at San Jose del Rancho on July 14 ; during the following ten days, six 

 nests and sets of eggs were obtained. Mr. Frazar notes three as the usual 

 " clutch," but four of the nests which he took contain four eggs each. 



The nests are essentially uniform in size and shape, and in these respects 

 similar to the nest of the Baltimore Oriole, although smaller and decidedly 

 shallower. All are largely composed of a fine, straw-colored, jute-like fiber firmly 

 interwoven, and four contain only this material, but the fifth is lined with 

 horsehair, and the sixth with cotton and a few feathers. One was attached to 

 the under side of a palm-leaf, two to the branches of orange trees, three were 

 in bushes, and one was suspended at the end of a drooping branch of some 

 deciduous tree. They were placed at heights above the ground varying from 

 four to eight feet. Mr. Xantus found a nest " on an aloe four feet high," 

 another on the stem of a Yucca angustifolia six feet from the ground, a third in 

 moss, " hanging out of a perpendicular bins', on the sea-coast," and a fourth 

 " in a convolvulus, on a perpendicular rock fifty feet high." ^ 



The twenty-five eggs taken by Mr. Frazar vary considerably in size and shape. 

 Some are ovate, others elongate ovate, and still others elliptical ovate. The 

 ground color is creamy white ; the markings are spots, blots, dashes, or irregu- 

 lar pen-like lines of lavender, light reddish or dark purplish broNvn, arranged 

 chiefly about the larger ends. These eggs average .89 x .61 with extremes of 

 .96 X 60, .94 X .64, .83 X-64 and .85 X .58. 



The Arizona Hooded Oriole is common in southern California and is found 

 as far north as Santa Barbara. It also inhabits southern Arizona and western 

 Mexico as far south as Mazatlan. 



1 Baird, Brewer, and Ridgway, Hist. N. Amer. Birds, II. 1874, 194. 



