BIRDS OF NORTH AND MIDDLE AMERICA. 85 



nvn. Sixth primary abrujitly shorter than seventh; hallux 

 shorter than outer toe, its claw shorter than dis- 

 tance from nostril to tip of maxilla; edge of wing 

 yellow; adult without black rictal streak or streaks 



on chest Coturniculus (p. 205) 



kk. Outermost (ninth) primary shorter than seventh; tail 

 rounded or graduated, the lateral rectrices decidedly 



shorter than middle pair Ammodramus (p. 211) 



n. Outermost (ninth ) primary not longer than sixth (usually sh(jrter 



than iifth), or else (SpizeUa, nart) wing-tip equal to length of 



middle toe without claw ; rectrices not narrow and acuminate. 



(Zonutrichix.) ' 



j. Outer toe reaching to middle of suVjterminal phalanx of middle 



toe, its claw reaching nearly if not quite to middle of middle 



claw Passerella (p. 884) 



,;)'. Outer toe not reaching to middle of subterminal jjhalanx of 

 middle toe, its claw not reaching nearly to middle of mi<ldle 

 claw. 

 Jc. Outermost (ninth) primary longer than second; tail gradu- 

 ated for much less than length of middle toe without claw. 

 /. Claw of hallux equal to the digit in length; lateral claws 

 reaching decidely beyond base of middle claw; remiges 



and rectrices olive-green Oreospiza (p. .399) 



IL Claw of hallux shorter than the digit; lateral claws not 

 reaching beyond base of middle claw; remiges and 

 rectrices not olive-green. 

 rn. Tail longer than distance from bend of wing to tip of 

 secondaries, or else {Junco, part), lateral rectrices 

 largely white; middle rectrices not barred with black; 

 wing-tip longer than exposed culmen. 

 n. Head plain gray (lores darker); lateral rectrices largely 

 white, or else back streaked with dusky, and Aving 

 without distinct light-colored markings. 



Junco (p. 271) 

 nn. Head not plain gray, or else {Spizidhi, i^art) lateral 

 rectrices without any white, and tail longer than 

 wing; lateral rectrices not largely (if with any) 

 white, or else head with white stripes. 

 0. Upper parts not grayish, or else (SpizeUa, part) the 

 back cinnamon-brown streaked with T)lack, and 

 tail longer than wing. 

 p. Tarsus at least one-third as long as \\ing. 



q. No rufous collar around hindneck; no Ijlack on 

 pileum, except in form of narrow streaks; the 

 pileiuri sometimes plain chestnut. 



Melospiza (p. 349) 

 qq. A rufous collar around hindneck; pileum with 

 two broad lateral bands of blackand a median 

 one of gray, never plain chestnut. 



Brachyspiza (p. o46) 

 pp. Tarsus decidedly less than one-third as long as 



^ I am unable to characterize supergeneric divisions of this group. 



