Fig. 3 Evermann's ptarmigan (Lagopus evermanni). Male, in June. 



never over the last number. Full-feathered 

 tarsi, that is, feathers to the toes. 

 Bonasa: Sexes alike. Head full-crested. 

 Black epaulette on either side of neck, 

 where the "tympanum" is rudimentary. 

 Tail and wings of a length, the former 

 rounded and composed of 18 feathers, 

 with distal ends truncated. Tarsi naked 

 below, and otherwise very slightly feath- 

 ered. Breastmeat white when cooked. 

 An arboreal, woodland genus. (Said to 

 be closely allied to the genus Tetrastes of 

 Europe). 



Lagopus: Head and neck plainly feathered. 

 Tail barely rounded, short, with 14 feath- 



ers, 16, if the long pair of middle feathers 

 of the upper tail coverts are counted in. 

 Unfeathered red comb over either eye. 

 Tarsi and toes heavily feathered. White 

 in winter. 



Tympanuchus: Moderate, soft crest on 

 head. Tuft of elongated, somewhat pointed 

 loose feathers on the neck at either side. 

 Below each of these is the yellow-skin 

 tympanum, which is bare and capable 

 of distention to the size of a big lemon. 

 Tarsi bare posteriorly, but slightly feath- 

 ered in front and laterally. Toes more or 

 less webbed at their bases. Short, rounded 

 tail composed of 18 feathers. Sexes 



