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XII. Observations on some Species of the Genera Tetrao and 

 Ortyx, natives of North America ; with Descriptions of Four 

 new Species of the former, and Two of the latter Genus. Bt/ 

 Mr. David Douglas, F.L.S. 



Read December 16, 1828. T ("^^^^S 



In the course of a journey across the continent of North Ame- 

 rica, performed in the years 1825, 1826, and 1827, having 

 discovered several species of these genera, not before observed 

 or described, I submit the following notice of them to the So- 

 ciety. 



TETRAO. 



1. T.Urophasianus. Mas. Brunnescenti-griseus, ferrugineo ni- 

 groque undulatus, collo anteriore abdomineque imo nigris, 

 pectore albo plumis superioribus rhachibus rigidis, infe- 

 rioribus in medio nigro-lineatis, plumis colli lateralibus 

 elongatis, linearibus : caudd cuneatd, rectricibus subrigidis, 

 acutis. 



Foem. Brunnescenti-grisea, albo nigroque parc^ undulata ; ab- 

 domine imo nigro, pectore albo nigro-fasciato, caud4 sub- 

 cuneat^, rectricibus subacutis. 



T. Urophasianus. C. L. Bonaparte in Zoological Journal, vol. in. 

 p. 212. 



Cock of the Plains. Lewis and Clark's Travels, p. 473. 



Male. Bill black, one inch and three-fourths long : upper man- 

 dible 



