BIRDS OF NORTH AND MIDDLE AMERICA. 31 



/. Outermost (ninth) primary longest; tail emarginate, the rectrices pointed 



at tip, the middle pair acuminate. {Spizx.) Spiza (p. 170) 



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

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

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

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

 (Chondestes!.) 

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

 aries, decidedly rounded; all the rectrices broad and rounded 



terminally, including middle pair Chondestes (p. 175) 



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

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

 rowed terminally, the middle pair subaeuminate. 



Pooecetes (p. 181) 

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

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

 //. Bill much swollen, with superior and lateral outlines decidedly 

 convex; mandibular tomium strongly convex anterior to the sub- 

 basal angle; wing 114.50 mm., or more. ) 



Phenotious (p. 621) 

 hh. Bill tapering gradually from base, its superior and' lateral outlines 

 nearly straight; mandibular tomium very slightly convex ante- 

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

 i. Maxilla 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. 613) 



f(. Maxilla conspicuously shallower than mandible, the angular 

 indentation of its tomium distinctly anterior to its broader than 

 long nasal fossae; 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. AVing-tip not as long as tarsus, or else [Cyanospiza, part, Slrxdis, part) 

 wing less than 76.20 mm. 

 /. Tail less than twice as long as tarsus; outstretched feet reaching beyond 

 end of tail. ( Oeospizie. ) 

 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) 



hh. 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 mandibular tomium 



not toothed Camarhynchus (p. 476) 



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

 for part 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. 



