ICTERUS BULLOCKI. 509 



cotton-wood by our camp containing five, some of which, however, were 

 unoccupied. In May we found numbers of them in tlie rich valley of the 

 Truckee, near Pyramid Lake, and observed that they were then subsisting- 

 chiefly on the tender buds of the grease-wood {Obione coiifcrtifoUa), in com- 

 pany with Hedi/meJes melanoceplialus, Pyranga ludoviciana, and some other 

 species. 



The nest of Bullock's Oriole is very similar in its structure and compo- 

 sition to that of the Baltimore (/. baltimore ), but it is less frequently pendu- 

 lous, and seldom, if ever, so gracefully suspended. Its usual position is 

 between upright twigs, near the top of the tree, thus resembling more that 

 of the Orchard Oriole (/. spurius), which, however, is very different in its 

 composition. 



List of specimens. 



1, nest and eggs (2); Sacrameuto, California, June G, 18G7. Nest in top of large 

 isolated cotton-wood. 



220, nest; Camp 19, West Humboldt Mountains, October 1, 1SC7. In aspeu- 

 tliicUet. (Collected by Mr. J. D. Hague.) 



5G7, (J ad; Truckee Reservation, May 15, 1SC8. 8^— 12f— ("?)— 3Jg. Upper man- 

 dible, black, tbe tomium bluish-white; lower, pale blue, slightly dusky toward end of 

 gouys; iris, hazel ; tarsi and toes, pale brownish-blue. 



808, nest; Truckee Iteservation, May, 18C8. Nest on drooping branch of 

 willow. 



1057 (2), 1058 (5), nests and eggs ; Salt Lake City, Utah, May 27, 18G9. Nests iu 

 mountain-mahogany bush, 1,500 feet above camp. 



lOGl, ^ad. (parent of No. 1057). 8— 12^. Upper mandible black, tomium and 

 lower mandible line light blue; iris, brown; tarsi and toes, deep blue, with a faint 

 yellowish stain. 



10G5, nest and eggs (4); Salt Lake City, May 29, 1SC9. Nest iu maplesapliug, iu 

 wooded ravine. (City Creek Cailon.) 



1106, nest and eggs (2) ; Antelope Island, Great Salt Lake, June 5, 18G9. Nest 

 iu apple- tree, in orchard. 



1130, nest and eggs; Antelope Island, June 7, 1869. Willow-copse. 



1178, 1179, nests and eggs; Salt Lake City, June 18, 18G9. Mountain-mahogany 

 trees, 1,800 feet above camp. 



1346, iad.; Parley's Park, Wahsatch Mountains, Utah, June 28, 1809. 8i— 12. 

 Bill black, commissure and lower mandible fine light blue; iris, brown; tarsi and 

 toes, horn-blue. 



1387, nest; Provo River, Utah, July 10, 18G9. Thorn apple bush. 



1390, nest; Provo River, Utah, July 11, 1869. Thorn-apple bush. 



