. Bulletin - United States National Museum. Science. 106 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM Genus AI\IAUROLIMNAS Sharpe Amaurolimnas Sharpe, Bull. Brit. Orn. Club, 1, No. 5, 1893, p. xxviii. (Type, by original designation and monotypy, Ralhis concolor Gosse.) Medium-sized Rallinae (wing about 130 mm.) with posterior portion of nostril impervious, middle toe (without claw) much shorter than tarsus, mandibular rami with a distinct lateral groove, feathers of alula rounded terminally, and plumage wholly plain rufescent. Bill about as long as head (or slightly shorter), very compressed, i
. Bulletin - United States National Museum. Science. 106 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM Genus AI\IAUROLIMNAS Sharpe Amaurolimnas Sharpe, Bull. Brit. Orn. Club, 1, No. 5, 1893, p. xxviii. (Type, by original designation and monotypy, Ralhis concolor Gosse.) Medium-sized Rallinae (wing about 130 mm.) with posterior portion of nostril impervious, middle toe (without claw) much shorter than tarsus, mandibular rami with a distinct lateral groove, feathers of alula rounded terminally, and plumage wholly plain rufescent. Bill about as long as head (or slightly shorter), very compressed, its width at posterior end of nostril equal to about half its depth at same point, the latter equal to more than one-third the length of culmen; culmen distinctly arched (convex) basally, slightly depressed (concave). Figure 6.—Amaurolimnas concolor concolor, above anterior end of nostril, gradually but strongly decurved ter- minally; gonys about two-thirds as long as mandibular rami, nearly straight, slightly ascending terminally, its basal angle distinct but scarcely prominent; mandibular rami with a broad and shallow lateral groove; nasal fossa large and well defined, obtusely cuneate, its anterior end decidedly nearer tip of maxilla than to loral feathering; nostril rather large, longitudinally elliptical, its posterior portion (between one-third and one-half) impervious; laterofrontal antia at upper edge of nasal fossa, receding thence, with a faintly convex outline, to the rictus; malar antia decidedly posterior to laterofrontal antia, the mental antia about on line with posterior end of nostril. Wing rather short, very concave beneath, rounded, the longest primaries exceeding distal secondaries by about one-fourth the length of wing; and much ex-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Unite
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