1. LAGOPUS. 35 



C. Tarsi partially feathered, the lower part 

 beiug entirely naked, toes pectinate on side. 



d, A nifik'd frill of feathers on each side of 



the neck; sexes similar; tail composed 



of !."< feathers 10. Bo.vASA, p. 85. 



e. No ruffled frill on each side of the ueek ; 



sexes different; tail composed of K! 



feathers , . 11. Teteastes, p. 89. 



1. LAGOPUS. Typ^ 



Lagopus, Briss. Orn. i. pp. 181, 216 (1760) L. albiis. 



Keron, Montin, P/ii/s. iSdlsk. Handl. Stockh. i. p. 155 



(1770) L. mutus. 



Oreias, Kaiip, Nat. Si/.<>t. p. 177 (182'J) L. scotieus. 



Attnpreu, Kaiip, Nat. Syst. p. 170 (1829) L. rupestris. 



Acetinornis, Bonap. C. R. xlii. p. 880 (1856) L. scotieus. 



Tail composed of IG feathers, moderately long, subequal, and 

 roiuided at the extremity. 



1st i)rimary much shorter than the 2nd, falling between the Gth 

 and 7th ; 4th primary sliglitly the longest. 



Tarsus sliorter than middle toe and claw. 



Feet and toes densely covered with feathers. 



Axillaries fairly long. 



Rcoitje. Circumpolar. 



Kcij to the Species. 



A. Outer tail-feathers black, with the base and tip 



more or less white. 



1. I'rimaries always blackish brown scotieus, p. 35. 



2. Primaries always white. 



rt. The white, if present, on the outer web of 

 tlie outer tail-feathers confined to the 

 basal portion. 

 a. Hill much stouter and larger ; wing about 



8 inches lagojws, p. 40. 



8. Hill much more slender ; wing about 7'5 , . . , 



. , ^ mutus, p. 44. 



niches < •/• ■ n iW 



h. The wliite on the outer web of the outer ' ' " * '*> P- 

 tail-feathers covering at least tlie basal 

 twt) thirds hypcrboveus, p. 51. 



B. Outer tuil-feathers white leitcurus, p. 52. 



1. Lagopus scotieus. 



Lagopus altera, Albin, N. H. Birds, i. pis. 2.3 & 24 (1738). 



La Geliuute d'Ecosse, Briss. Orn. i. p. 190, pi. xxii. tig. 1 (17G0). 



lied Grouse, Lath. Oen. Si/n. ii. pt. ii. p. 746 (178.S), Suppl. i. p. 21G 



(1787); id. Gen. Hist. B. viii. p. 247 (1823); Yarrell, Brit. B. ii. 



p. 315 (184.'?). 

 Tetrao scotieus, Lath. Gen. Syn. Suppl. i. p. 290 (1787) ; id. Ind. 



Orn. ii. p. 641 (1790) ; Penn. Brit. Zool. i. p. 356, pi. 57 (1812) ; 



Hchiv.z, Nat. AhhUd. Toy. p. 280, pi. 105 (18;«) ; Thomps. Nat. Hist. 



•Irel. li. p. 47 (\i<m);' Seebohm, Hist. Brit. B. ii. p. 428, pi. 20 



(1884). 



1)2 



