C: 185...) 
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. By 
Mr. David Douglas, F.L.S. 
Read December 16, 1828. 
Ix 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, ien tenete 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 : cauda cuneatà, rectricibus subrigidis, 
acutis. 
EaD. Brunnescenti-grisea, albo nigroque parcè undulata ; ab- 
. domine imo nigro, pectore albo nigro-fasciato, caudâ sub- 
: _cuneata, rectricibus subacutis. aien ae TE 
T. Tropea., Rf L. Bonaparte i in 1 Zool EAR E ii. 
p. 2127.74 ug 
Cock of the Plains. Tomo und Clark’ s Travels, p. 473. 
Male. Bill black, one inch and three-fourths long : upper man- : 
- dible 
Lat dus 
