44 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



not glossy, dusky or dusky olive, with or without white 

 dots, the chest, etc., plain gray or slate color. 



Laterallus (subgenus Creciscus) (p. 148) 



gg. Bill longer, more than half (nearly as long) as head; toes 



longer, first two phalanges (together) of middle toe as long 



as tarsus, the hallux (without claw) half as long as tarsus ; a 



black loral and a white supraloral streak. 



Porzana, part (subgenus Hapalocrex) (p. 134) 

 ff. Longest feather of alula extending considerably beyond tips of 

 longest primary coverts. 

 g. Nostril narrowly elliptical; tarsus shorter than middle toe with 

 claw ; outermost primary equal to or longer than distal second- 

 aries ; proximal secondaries shorter than longest primaries. 

 h. Bill more cuneate (tapering) in lateral outline, its depth at 

 base of gonys much less than at posterior end of nostril, the 

 mesorhinium elevated and more or less arched, the distal por- 

 tion of culmen strongly decurved or convex; tarsus shorter 

 than middle toe without claw ; under tail coverts barred 

 with white and blackish. 



Laterallus (subgenus Limnocrex) (p. 150) 

 hh. Bill more uniform in lateral width, its depth at base of 

 gonys nearly equal to that of posterior end of nostril, the 

 mesorhinium much less elevated, not arched, terminal por- 

 tion of culmen not strongly convex ; tarsus as long as or 

 longer than middle toe without claw; under tail coverts 

 plain cinnamon-rufous, 

 i. Malar antia slightly posterior to the obtusely angled loral 

 antia ; bill much more compressed, its width at posterior 

 end of nostril equal to but little more than half the depth 

 at same point; tarsus not longer than middle toe without 

 claw; underparts white medially and posteriorly (except 

 under tail coverts), the flanks and axillars barred with 

 white and dusky, the under wing coverts white. 



Laterallus (subgenus Laterallus) (extrallmital)" 

 it. Malar antia slightly but distinctly anterior to the broadly 

 rounded loral antia; bill much less compressed, its width 

 at posterior end of nostril equal to decidedly more than 

 half its depth at same point ; tarsus longer than middle 

 toe without claw, underparts wholly cinnamon-rufous, 

 the under wing coverts and axillars also cinnamon- 

 rufous Laterallus (subgenu.s Thryocrex) (p. 151) 



gg. Nostril rather broadly ovate or triangular ; tarsus longer than 

 middle toe with claw ; outermost primary much shorter than 

 distal secondaries; proximal secondaries longer than longest 



'''Laterallus Gray, Cat. Gen. and Subgen. Birds, 1855, 120 (type, by monotypy, 

 Rallus melanophaim Vieillot; ex Bonaparte, 1854, nomen, nudum). — Lateri- 

 rallus (emendation) Bonaparte, Compt. Rend., xliii, 1856, 599. — Crytiastes 

 Cabanis, Journ. filr Orn., 1856 (published 1857), 428 (new name for Laterallus, 

 on grounds of purism). — Doriacopliilus Reichenow, in Heine and Reichenow, 

 Nom. Mus. Hein. Orn., 1890, 320 (new name for Lnterallm on grounds of 

 purism). South America. 



