34 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



mm. Bill thicker (depth at base more than half length of 



commissure) Haplospiza (p. 520) 



U. Bill shorter (distance from nostril to tip of maxilla less 

 than half length of tarsus) or else' plumage yellow. 

 m. Outermost (ninth) primary longer than sixth; wing-tip 

 equal to or longer than tarsus; plumage yellow or 



yellowish Sicalie (p. 521) 



•mm. Outermost (ninth) primary shorter than sixth; wing- 

 tip much shorter than tarsus; plumage not yellow 

 or yellowish, 

 n. Oulmen decidedly convex; adult males with chestnut 



or rufous on throat, etc Pyrrhulagra (p. 547) 



mi. Culmen straight or nearly so; adult males without 

 chestnut on throat or elsewhere. 

 0. Wing more than 63.50 mm.; adult male entirely 



black, with whitish feet Melanospiza (p. 544) 



00. Wing less than 63.50 mm.; adult males not entirely 



black, or else the color glossy blue-black and the 



feet dusky. 



p. Tail even or very slightly rounded; adult males not 



glossy blue-black; females and young not 



streaked Euetheia (p. 529) 



pp. Tail much rounded or graduated; adult males 

 glossy blue-black; females and young con- 

 spicuously streaked Volatinia (p. 525) 



lih. Species of mostly variegated plumage, without any bright colors 

 (except sometimes yellow on under parts or edge of wing) ; often 

 streaked, the young nearlj' always ; if plumage of adult male, 

 largely black and chestnut, the tail longer than wing. '' 

 i. Outermost (ninth) primary longer than sixth, or else {Ammodra- 

 mus, part) rectrices narrow and acuminate. 

 j. Wing more than 82.55 mm.; adult male (in summer) black 

 with white wing-patch. ( Calamospizie. ) . Calamospiza ^ (p. 167) 

 jj. Wing not more than 82.55 mm.; adult male never black nor 

 with white wing-patch. (Ammodrami.) 

 I: Outermost (ninth) primary longest or equal to longest; tail 

 emarginate, with lateral rectrices longer than media;n pair. 



I. Hallux little if any longer than inner toe; wing exceeding 



tail by decidedly more than length of tarsus; rectrices 

 • broader, less acuminate Passerculus (p. 187) 



II. Hallux decidedly longer than inner toe; wing exceeding 



tail by very little more than length of tarsus; rectrices 

 narrower, more acuminate, the lateral pair relatively 

 shorter. 

 VI. Sixth primary not abruptly shorter than seventh; hal- 

 lux longer than outer toe, its claw longer than distance 

 from nostril to tip of maxilla; edge of wing white; 

 adult with a black rictal streak and with chest streaked 

 with black Centronyx (p. 202) 



I ^Sicalis, part; i. e., iS. co?u»iMcma Cabanis, which, notwithstanding its close resem- 

 blance in coloration to the typical species, differs so much in form that it should 

 probably be separated generically. 



''A heterogeneous assemblage, comprising several minor groups. As to above 

 unsatisfactory diagnosis, see footnote on page 33. 



•' This genus is rather an isolated form, and I do not know where it really belongs. 

 It seems to show points of relationship to Rhynchophmies, Spita, and Chondestes. 



