46 PERDICIDjE. 



The DUSKY GROUS. TETRAO obscurus, Say. Bonap. 

 Am. Orn. t. 18. Faun. Bor. Am. Birds, t. 59, 60. T. 

 Richardsonii, Dougl. 



a. Male. North America. Presented by J. Richardson, 



M.D. 

 6. North America. Presented by the Hudson's Bay 



Company. 



The COCK OF THE PLAINS. CENTROCERCUS urophasianus, 

 Swains. Tetrao urophasianus, Bonap. Am. Orn. t. 21. 

 f. 1. Faun. Bor. Amer. t. 58. 



a. Male. Rocky Mountains, North America. Presented 

 by the Hudson's Bay Company. 



b. Female. Rocky Mountains, North America. Pre- 

 sented by the Hudson's Bay Company. 



The LONG-TAILED GROUS. CENTROCERCUS phasianellus, 

 Swains. Tetrao phasianellus, Linn. S. N. i. 273. 

 Bonap. Am. Orn. t. 19. T. urophasianellus, Dougl. 



a. Hudson's Bay. Presented by the Hudson's Bay Com- 

 pany. 



b. Northern Land Expedition. Presented by Capt. Sir 

 G. Back, R.N. 



The RUFFED GROUS. BONASA umbellus, Steph. Tetrao 

 umbellus., Linn. S. N. i. 275. Wils. Am. Orn. t. 49. 

 T. togatus, Linn. pi. enl. 104. T. umbelloides, aut 

 T. Sabinii, Dougl. 



a. b. Canada. Presented by Mrs. W. P. Mauger. 



c. North America. Presented by the Hudson's Bay 

 Company. 



The HAZEL GROUS. BONASA sylvestris, Brehm. Tetrao 

 bonasia, Linn. pi. enl. 474, 475. T. canus? GmeL B. 

 rupestris, Brehm. B. betulina, Strickl. B. Europea, 

 Gould. 



a. Male. Germany. Presented by J. Gould, Esq. 

 6. Male. North America. 

 c. Female. North America. 



