BIEDS OF NOKTH AND MIDDLE AMERICA. 31 



/. Outerinos^t (ninth ) primary longest; tail eniarginate, the rectrices pointed 



at tip, the middle pair at-miiinate. {Spiza'.) Spiza (p. 170) 



/■. Outermost (ninth) primary not longest; tail even or slightly rounded, 

 all the rectrices broad and rounded, or at most subacuminate, at tip. 

 [/. Tarsus decidedly longer than middle toe with claw; bill relatively 

 small (culmen, from base, less than two-thirds as long as tarsus). 

 (Chondesteie.) 

 h. Tail longer than distance from bend of wing to tips of distal second- 

 aries, decidedly rounded; all the rectrices broad and rounded 



terminally, including middle pair Chondestes (p. 175) 



/(/(. Tail shorter than distance from bend of wing to tips of distal 

 secondaries, even, or slightly eniarginate; lateral rectrices nar- 

 rowed terminally, the middle i)air su])acuminate. 



Pooecetes (p. 181) 

 gij. Tarsus not longer than middle toe with claw; bill large (culmen, from 

 base, nearly equal to, sometimes longer than, tarsus). {Gfuiraae. ) 

 /(. Bill much swollen, with sui)erior and lateral outlines decidedly 

 convex; mandibular tomium strongly convex anterior to the sub- 

 basal angle; wing 114.50 mm., or more. 



Pheucticus (p. 621) 

 lili. P>ill tapering gradually from base, its superior and lateral outlines 

 nearly striiglit; mandibular tomium very slightly convex ante- 

 rior to the .subbasal angle; wing less than 114.50 mm. 

 i. ]\Iaxilla not conspicuously shallower than mandible, the angular 

 indentation of its tomium directly beneath the longer than 

 broad nasal fossae; subbasal angle of mandibular tomium 

 toothed; adult males without blue, but with black, white, and 

 rose red, or black, white, cinnamon, and yellow; females and 



young conspicuously streaked Zamelodia (p. (313) 



•)/. Maxilla conspicuously shallower than mandi})le, the angular 

 ■indentation of its tomium distinctly anterior to its liroader than 

 long nasal fosste; subbasal angle of mandibular tomium not 

 toothed; adult males blue with rufous or chestnut wing- bands; 



females and young not streaked Guiraca (p. 606) 



ee. Wing-tij) not as long as tarsus, or else {('i/duo.yjizd, i)art, SiniUti, part) 

 wing less than 76.20 mm. 

 /. Tail less than twice as long as tarsus; outstretdietl tVet reaching beyond 

 end of tail. ( Geospizn'. ) 

 g. Culmen more strongly and regularly curved, more distinctly ridged; 

 sides of bill more flattened, or else angle of mandibular tomium 

 toothed; adult males with uniform black confined to head, neck, 

 and chest, sometimes without any black. 

 h. Bill broader (basal width of mandible decidedly greater than length 

 of gonys); commissure more strongly angulated or deflexed 

 basally, the angle of mandibular tomium toothed. 



Platyspiza (p. 473) 



/(/(. Bill- narrower (basal width of mandible not greater than length of 



gonys, sometimes decidedly less); commissure less strongly 



angulated or deflexed basally, the angle of mandi))ular tomium 



not toothed Camarhynclius (p. 476) 



gg. Culmen less strongly and regularly curved (sometimes nearly straight 

 for ])art of its length), less distinctly ridged; sides of bill less flat- 

 tened; angle of mandibular tomium not toothed; adult males 

 entirely black, except under tail-coverts. 



