GROUSE, PARTRIDGES, QUAILS, ETC. 



113 



Fig. 176. 



Fig. 180. 



5'. Tarsus divided into 

 plates. 



Fig. 175. 



G. Bill slightly hooked or notched at tip. 

 7. Small; wing 1.90-2.20. 



8. Upper parts greenish or grayish ; 



tail even. Vireonidse : 



Vireos, p. 3U4. 



8'. Upper parts bluish ; tail gradu- 



ated Sylviidae : Kinglets, 



Gnatcatchers. etc. 



(Genus Polioptila : Gnat- 



catchers), p. 463. 



Fig. 177. 



Fig. 178. 



Fig. 182. 



7'. Large : length 8 to 9. 



Troglody tidee : Wrens, 

 Thrashers, etc. 

 (Genus Oroscoptes : Sage 



Fig. 179. Thrashers), p. 433. 



6'. Bill not hooked at tip. 



7. Tail feathers stiff, pointed at tip. 

 Certhiidae : Creepers, p. 451. 



Fig. 181. 



7'. Tail feathers normal (except genus 

 O Chamcea, in which the first pri- 



mary is more than half as long as 

 second) .... ParidcB : 

 Fig. 183. Nuthatches and Tits, p. 452. 



ORDER GALLING : GALLINACEOUS BIRDS. 

 (FAMILIES TETRAONID.E, PHASIANID^E, AXD CRACID.E.) 



FAMILY TETRAONIDJE : GROUSE, PARTRIDGES, 



QUAILS, ETC. 



KEY TO GENERA. 



1. Legs feathered down to base of toes. 



8^% 



' , ~ 



2. Tail feathers narrow and pointed, 



Centrocercus, p. 133. 



/^ ^ . 



2.' Tail feathers broad and rounded. 

 3. Sides of neck with tuft of feathers. 



Tympanuchus, p. 129. 



Fig. 184. 



