OF THE GENUS TETRAO. 391 



Female : mottled. 



Tetrao kybridtts, Sparm. Mus. Carls. I. pi. 15. ad. male. 



Tetrao medhu, Meyer. Temm. 



Inhabits the high north of the old continent: most com- 

 mon in Russia and Lapland, but nowhere abundant : rare and 

 accidental in central Europe. 



G. Tetrao tdr'i.r. L. 



No beardlike appendages; tail deeply forked, of eighteen 

 feathers, the exterior turned outwards; under tail-coverts 

 white; tarsus one inch ami a half long. 



Male ; Lrl'xsy- black, with violaceous reflections 



Female : mottled. 



Block (! roust. Lath. Bull', pi. enl. 172, male; 173, female. 



Inhabits Northern Asia, and Northern as well as Central 

 Europe. 



7. Tel ran obseurus, Say. 



Tail slightly rounded, of twenty broad, rounded, blackish 

 feathers. 



Male; black. 



Female and young; duskybrown, somewhat mottled. 



Dusky Grouse, Tetrao obscuru8,186b. Am. Orn. hi. pi. 18, 

 female. T. Richardsonii, Sabine. 



Inhabits near the Rocky Mountains. Size of T. tetrix. 



8. Tetrao canadensis, L. 



Tail rounded, of sixteen black, rounded feathers; breast, 

 flanks, and tail-coverts spotted with white. 



.Male : black, waved w itli gray ; throat and breast deep blaek. 



Female; mottled; throat and breast banded with black and 

 rufous. 



Sjiiillnl GfOUSe, Til nio ititiinhnsis. Nidi. Am. Orn. iii. pi. 

 J-', male: pi. 21. fig. 1. female. 



