THE PINNATED GROUSE. 6l 



D. obsturus by the narrower grey band across the end of the 

 tail. 



This is merely a sub-species or race of the Dusky Capercailzie. 



Range. — North-western Rocky Mountains near the Pacific 

 Coast, from California to Sitka and Alaska. 



II. RICHARDSON'S CAPERCAILZIE. DENDRAGAPUS RICHARDSONI. 



Tetrao richardsonit, Dougl. Trans. Linn. Soc. xvi. p. 140 

 (1829); Wilson, Illustr. Zool. pis. xxx. xxxi. (1831). 



Dendragapiis richardsoni^ Elliot, Monogr. Tetraon. pi. viii. 

 (1865); Ogilvie-Grant, Cat. B. Brit. Mus. xxii. p. 76 



(1893). 

 Dendragapiis obsciirus richardsotiii^ Bendire, Life Hist. N. Am. 

 B. p. 50 (1892). 



Adult Male. — Easily recognised from the two forms pre- 

 viously mentioned by having the tail uniform blacky without a 

 grey band across the extremity. The tail is also squarer in 

 shape, the outer feathers being slightly longer than the middle 

 pair. 



Adult Female. — Resembles the females of the Dusky and 

 Sooty Capercailzie, but has no grey band across the tail, though 

 the feathers are usually margined with g?'ey at the tip. 



Range.— Eastern slopes of the northern Rocky Mountains, 

 from Montana northwards into British America. 



In Northern Wyoming and the eastern parts of Central 

 Idaho this species is said to intergrade with D. obsatrus, and 

 in North-eastern Idaho and Western Montana with D. fiili 

 ginosus. 



THE PINNATED GROUSE. GENUS TYMPANUCHUS. 



Tympa7iHchus, G\og. Hand. u. Hilfsb. p. 396 (1842). 



Type, T. cupido (Linn.). 



Toes naked and pectinate along the sides. Tail rather 



short and rounded and composed of eighteen feathers, the 



outer pair about two-thirds the length of the middle pair. 



