1874.] 49 [Allen. 



Other nests were found with the eggs uniform green, as usual. Song 

 and habits same as at the East. 



3. Oreoscoptes montanus Bd. Sage Thrush. 



Not common. Met with only along the Musselshell, and on the 

 divide between the Musselshell and Yellowstone. Seen only at dis- 

 tant intervals, either singly or two or three together, and very diffi- 

 cult to approach. Frequents the sage brush and grease wood, often 

 far away from streams or timber. 



4. Mimus earolinensis Gray. Cat Bird. 



One of the most common and generally distributed woodland 

 species met with, occurring along the streams everywhere, even 

 where the thickets of rosebushes and Symphoricarpus shrubs, with 

 here and there an occasional clump of small willows and isolated 

 scraggy box elders, were the only forms of arborescent vegetation. 



5. Harporhynchus rufus Cab. Brown Thrush. 



More or less common everywhere in the thickets along the streams 

 from the Missouri to the Musselshell. Far less numerous, however, 

 than the preceding species (Mimus earolinensis). 



SAXICOLHXE. ' 



6. Sialia aretica Sw. Arctic Blue Bird. 



First met with at the crossing of the Yellowstone. Rather fre- 

 quent along the Musselshell, and seen at Pompey's Pillar, and at a 

 few other points on the Yellowstone. Much more numerous along 

 the pine ridges than among the cottonwoods near the streams. 



PAEIDiE. 



7. Pams atricapillus var. septentrionalis All. Chick- 

 adee. 



Frequent along the Yellowstone and Musselshell Rivers, and no- 

 ticed in September along Heart River. 



SITTID^. 



8. Sitta earolinensis var. aculeata All. White-bellied 

 Nuthatch, 



Observed at rare intervals, both on the Yellowstone and Mussel- 

 shell Rivers. 



PROCEEDINGS B. S. N. H. — VOL. XVII. 4 OCTOBER, 1874. 



