16 KORTH AMERICAN BIRDS. 



fibres, the flowering stems of the Cladonia mosses, lichens, fine strips of 

 bark, etc. 



The eggs, which are four or five in number, e.xhibit noticeable variations 

 in size, shape, and shades of coloring, bearing some resemblance to tliose 

 of T. ustulatns and to the eggs asserted to be those of T. nanus, but are 

 sufficiently distinct, and are still more so from those of T. alicicv. They 

 range in length from .83 to .94, with a mean of .88, their mean breadth 

 is .66, the ma.\imum .69, and the minimum .63. Their ground color is 

 usually bluisli-green, sometimes light blue with hardly a tinge of green, 

 and the spots are of a j'^ellowish-brown, or russet-brown, or a mixture of 

 both colore, more or less confluent, with marked variations in tliis respect. 



Turdus swainsoni, \;ir. ustulatus, Nlttall. 



OKEGON THBUSH. 



Turdus iistulatits, Xrrr.vu., llan. 1, 1840, 400 (Columbia Kiver). — B.mkh, Wmh N. Am. 

 1858, 215, pi. Ixxxi, fig. 1. — In. Kev. Am. 15. 1864, 18. — Cooper & Suckley, 

 P. R. Rpp. XII, II, 1860, 171. — RiDOWAV, Pr. A. N. S. Philad. 1869, 127.— 

 n.M.i. k Hannisieu, Tr. Chic. Acad. — Cooper, Birds Cal., 5. 



Sp. Char. General appearance o( fiiscescens, bnt with pattern of swainsoni ; the buff 

 orbital ring as conspieuous as in latter. The olive above i.^ more hroirn than in this, and 

 les.s yellowish than in fuscescens, becoming decidedly more rufesccnt on wings and less 

 observably so on tail. Pectoral aspect different from fnscescens, the spots narrower and 

 cuneate, sharply defined, and arranged in longitudinal series ; in color tliey are a little 

 darter than the crown. Length, 7. ."jO ; wing, 3.75; tail, .3.00 ; tarsus, 1. 12. 



Hab. Pacific Province of United States. Tres ilarias Isl., Guatemala (winter), 

 Mus. S. I. 



This well-marked race is to be compared with suriinwni, not with 

 fuscescens, as has generally been done ; the latter, except in shade of 

 colors, it scarcely resembles at all ; stiU greater evidence tliat such is its 

 affinity is that the T. ustulatu.'i builds its nest on a tree, and lays a spotted 

 egg, like swainsoni, while fuscescens nests on or near the gi-ound, jierhaps 

 never in a tree, and lays a plain blue egg. The song of the present liird is 

 also scarcely distinguishable from that of swainsoni. Upon the whole, we 

 see no reason why this should not be considered as a Pacific Province form 

 of the Turdus swainsoni; at least it becomes necessary to do so, after 

 referring to T. pallasi, as geographical races, the T. auduhoni and T. namis. 



Habits. So far as we are aware, this thrush has a very limited distribu- 

 tion, being mainly restricted to the Pacific coast region from California to 

 Alaska in the lireeding season, tliough migriiting southward in winter to 

 Guatemala. Dr. Kennerly found it in great abundance breeding at Cliilo- 

 weyuck Depot, July 3, 18.59. Dr. Cooper also found it one of the most 

 abundant of the summer residents in Washington Territory, arriving there 



