GROUSE, PARTRIDGES, QUAILS, ETC. 



113 



Fig. 182. 



5'. Tarsus divided into 

 plates. 



Fig. 175. 

 G. Bill slightly hooked or notched at tip. 

 7. Small; wing l.UO-2.20. 



8. Upper parts greenish or grayish ; 



tail even. Vireonidae : 



Vireos, p. 394. 



8'. Upper parts bluish ; tail gradu- 

 ated Sylviidae : Kinglets, 

 Gnatcatchers, etc. 



{Genus Polioptila: Gnat- 

 catchers), p. 4(io. 



Large : length S to 0. 



Troglodytidae : "Wrens, 

 Thrashers, etc. 



(Genus Oroscoptes : Sage 

 Fig. 179. Thrashers), p. 433. 



0'. Bill not hooked at tip. 



7. Tail feathers stiff, pointed at tip. 

 Certhiidce : Creepers, p. 451. 



7'. Tail feathers normal (except genus 

 Channea, in which the first pri- 

 mary is more than half as long as 



second) Paridae : 



Fig. 183. Nuthatches and Tits, p. 4.j2. 



ORDER GALLING : GALLINACEOUS BIRDS. 



(Ka:miliks Ti:tra().\ii).k, Piiasiaxid-E, and CuAciihi:.) 



FAMILY TETRAONID^ : GROUSE, PARTRIDGES, 

 QUAILS, ETC. 



KKV TO (;knkka. 

 1. Legs feathered down to base of toes. 



2. Tail feathers narrow and pointt'd. 



Centrocercus, p. l: 



X 



Fig. 1S4. 



Tail feathers broad and rounded. 



], !Sides of neck with tuft of fe.ithors. 



Tympanuchus, p. IJO. 



