36 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



'/. Tail rounded, thf middle reetrices longest, or 

 equal to longest, and decidedly longer than 

 lateral pair; pileum largely black, or with two 

 broad lateral bands of chestnut and a median 

 one of buffy, or with a yellowish patch; larger 

 (wing not less than 68.58 mm., usually much 



more than 71.12 mm.) Zonotrichia (p. 329) 



(iq. Tail emarginate or double-rounded, the middle 

 rectrices decidedly shorter than the longest, 

 usually shorter than lateral pair, never 

 longer; pileum plain chestnut, rufous, or 

 gray, or narrowly streaked with black; 

 smaller (wing not more than 71.12 mm., xisu- 



ally less than 68.58) mm Spizella (p. 305) 



00. Upper parts grayish, including the back, the latter 

 usually unstreaked; tail shorter than wing. 



Amphispiza (p. 261) 



mm. Tail shorter than distance from bend of wing to tip of 



secondaries; lateral rectrices without white; middle 



rectrices barred with black; wing tip shorter than 



exposed culmen Plagiospiza (p. 229) 



l-k. Outermost (ninth) primarj^ shorter than second (sometimes 

 shorter than secondaries), or else {AimophiUi, part) the 

 tail graduated for as much as length of middle toe, with- 

 out claw, or more. 

 /. Back strea.ked, or else pileum and back jilain purplish 

 grayish brown, passing into gray on rumj), upper tail- 

 coverts, and tail Aimophila ^ ( p. 230) 



II. Back not streaked, nor purplish grayish brown in color. 

 m. Tail more than three times (sometimes nearly four 

 times) as long as tarsus; outermost (ninth) primary 

 not distinctly, if at all, shorter than secondaries 



(sometimes longer) Pipilo (p. 402) 



n. Tail not more than three times as long as tarsus, 

 usually less; outermost (ninth) primary distinctly 

 shorter than secondaries. 

 o. Eighth primary longer than secondaries. 

 p. Tibial feathers short (normal), not clear yellow. 

 '/. Tail shorter than wing. 



/'. A white loral spot, or else outermost jirimary 

 edged with white; edge of wing white, or 

 else a yellow patch on side of neck and a 



white auricular spot Melozone (p. 437) 



rr. No white loral spot nor edging ti) outermost 

 primary; back olive-green, or if gray a 

 black or grayish brown band across chest ; 

 edge of wing yellow or olive-green, or, 

 if white, a black or grayish brown band 

 across chest; no yellow patch on sides of 

 neck nor white auricular spot. 



^A very heterogeneous and probably unnatural genus, which, however, I am 

 unable to subdivide. 



