BIRDS OF NORTH AND MIDDLE AMERICA. 163 
Genus SCLERURUS Swainson. 
Sclerurus Swainson, Zool. Journ., iii, 1827, 356. (Type, Myiothera umbretia 
Lichtenstein.) 
Scelurus (typographical error?) BuRMEIsTER, Syst. Ueb. Th. Bras., iii, 1856, 45. 
Tinactor Maximiian, Beitr. Naturg. Bras., iii, pt. ii, 1831, 1106. (Type, T. 
Jfuscus Maximilian.) 
Oxypyga * MENETRIES, Mem. de l’Acad. St. Pétersb., sér. vi, Sci. Nat., i, 1835. 
519. (Type, O. scansor Ménétriés= Mytothera umbretia Lichtenstein.) 
Oxypiga Lesson, 1839. 
Geoecia Bertoni, Aves Nuevas del Paraguay, 1901, 79. (Type, G. orvyctera 
Bertoni= Myiothera umbretta Lichtenstein.) 
Medium sized Furnariide (length about 150-160 mm.) with long 
slender bill (as long as or longer than head), tail much shorter than 
wing, with rectrices broad and rounded terminally and with very 
rigid but not protruded shafts; hallux much longer than inner toe, 
the latter conspicuously shorter than outer toe, middle toe united 
to outer toe for whole of first and part of second phalanx, and plain 
brownish coloration. 
Bill about as long as head, or longer, slender, straight or slightly 
decurved, its width at loral antiz equal to or greater than its depth 
at same point and equal to a little less than one-fourth to nearly 
one-third the distance from nostril to tip of maxilla; culmen dis- 
tinctly ridged, straight basally, gradually decurved terminally, or 
straight for most of its length and terminal portion rather abruptly 
decurved; maxillary tomium nearly straight to decidedly concave, 
minutely but distinctly notched subterminally; mandibular tomium 
more or less convex, at least terminally, without trace of notch; 
gonys faintly convex basally, faintly concave terminally (the tip of 
mandible slightly but distinctly decurved in S. mezicanus). Nostril 
exposed, posteriorly in contact with loral feathering, broadly oval, 
horizontal, margined above by narrow membrane, a conspicuous 
internal tubercle or septum occupying nearly the posterior half. 
Rictal bristles absent, and feathers of chin, etc., without distinct 
Gf any) terminal sete. Wing rather large and pointed, the longest 
primaries considerably longer than secondaries; eighth, or sixth, 
seventh, and eighth, primaries longest, the tenth (outermost) two- 
thirds to three-fourths as long as the longest, the ninth equal to or 
longer (sometimes much longer) than secondaries. Tail between 
two-thirds and three-fourths as long as wing, strongly rounded, the 
rectrices (12) broad, rounded terminally, with very rigid shafts, 
which are denuded but not protruded terminally. Tarsus shorter 
than culmen, about one-fourth as long as wing, scutellate anteriorly 
(sometimes indistinctly so), the planta fused (nonscutellate); middle 
toe, with claw, a little longer than tarsus; outer toe, without claw, 
@ of6 acutus, xuyy cauda. (Ménétriés.) 
