CONTRIBUTIONS TO THE NATUEAL HISTOEY OF ALASKA. 183 



Parus obtectus Cab. 



Forehead, top and back of bead, brownish gray. Back, light fulvous-gray. Wings, dusky-slate 

 Secondaries conspicuously edged with white. Tail, plumbeous-slate; outer feathers edged with paler 

 plumbeous. Neck and sides of head, white. Chin and throat fuliginous dusky, some of the posterior 

 feathers of the throat tipped with white. Breast aud abdomen, white. A narrow, dark, fuliginous 

 stripe runs through the eye and separates the white of the auriculars from the color of the crown. 



The iris, bill, and feet, black. 



Parus ductus is an inhabitant of the northern portions of Europe and western Sibiria as far 

 east as the Yenisei Biver. 



Parus obtectus is fouud throughout the eastern portions of Siberia, aud is the true Siberian form. 



This species (obtectus) is not abundant in the known portions of the Yukon District. It is a 

 winter resident and doubtless breeds there. A single specimen was obtained from Saint Michael's. 

 The Chickadees visit the coast only during favorable weather in winter. I have never seen any 

 species in the vicinity of Saint Michael's during the breeding-season. 



The specimen procured by Mr. MacFarlane was a female. The nest and eggs of this individual 

 were also secured, and are now in the collection of the Smithsonian Institution. 



740. Parus htjdsonicus Forst. " Hudsonian Chickadee. [See Plate X.] 



A number of specimens of this Chickadee were obtained from Fort Yukon, Nulato, and sev- 

 eral from Saint Michael's. 



It visits the coast only during the winter. May 20th was the latest date obtained at Saint 

 Michael's. This particular bird was shot while it was among a straggling clump of low willows on 

 the edge of a high bank, forming the outline of a lake. 



The iris, feet, and bill of the fresh specimen are black. 



It is a constant resident of the wooded districts, and in some localities is quite abundant. It 

 was not observed out of the Yukon District by me. 



749 Eegulus calendula (Linn.). Ruby crowned Kinglet. 



Specimens of the Euby-crowned Kinglet were obtained from Fort Yukon, where it is common, 

 breeding there. 



This bird may occur on the coast of the Yukon District, although I have not seen it. 



At Nushagak, on Bristol Bay, I saw a single specimen of this bird flitting among the willow 

 thickets which skirt the banks of that river. The date was June 28, 1878. 



757. Turdus ALiciJE Baird. Gray-cheeked Thrush. 



This species is not common at Saint Michael's. A pair were observed, flitting from one clump 

 of small alders to another, just back of the Eedoubt. They flew to a larger patch, where I obtained 

 the male. The female took flight at the discharge of the gun, and was not secured. 



This species breeds in this viciuity, but I failed to discover the nest and eggs. 



They arrive about the first week in June. I have no date of departure. The iris and upper 

 mandible, black ; lower mandible, dark anteriorly and lighter at base, drying very pale. Feet 

 dark, with paler soles. Gape yellow. 



This species has not yet been detected on the Aleutian Islands. 



758a. Turdus ustulatus swainsoni (Cab.). Olive-backed Thrush. 

 A single specimen of this species was obtained from Fort Tukon, Alaska. 

 It is apparently not common in any locality and probably does not visit the coast of the Yukon 

 District. 



761. Merula migratoria (Linn.). American Robin. 



The specimens of the Bobin collected by me were obtained from Fort Yukon, where it is quite 

 common and breeds. 



It arrives there during the latter twenty days of May and remains until the sharp frosts of 

 September. I obtained no specimens from other parts of the Yukon District. 



