180 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Genus PREMNOPLEX Cherrie. 
Premnoplex © Cuerrig, Proc. U. S. Nat. Mus., xiv, no. 855, Sept. 4, 1891, 339. 
(Type, Margarornis brunnescens Lawrence.) 
Small scansorial Furnariide (length about 135 mm.) with second 
phalanx of outer toe partly joined to middle toe, tarsus shorter than 
middle toe with claw, wing less than three and a half times as long 
as tarsus, exposed culmen as long as middle toe without claw, and 
inner webs of remiges without any buff or ochraceous area. 
Bill nearly as long as head, slender, its width at loral antie greater 
than its depth at same point and equal to decidedly less than half 
the distance from nostril to tip of maxilla; culmen distinctly ridged, 
slightly and gradually curved from near base, the tip of maxilla very 
slightly decurved, not uncinate; tomia nearly straight for terminal 
half or more but strongly deflected basally, without trace of sub- 
terminal notch; gonys nearly straight, slightly prominent basally, 
slightly ascending terminally. Nostril exposed, posteriorly in con- 
tact with loral feathering, very narrow (a horizontal slit), over- 
hung by a broad, convex, membraneous operculum. Rictal bristles 
absent, and feathers of chin, etc., without terminal sete. Wing 
rather short, excessively rounded, the longest primaries exceeding 
secondaries by much less than length of exposed culmen; sixth, 
seventh, and eighth primaries longest, the tenth (outermost) about 
three-fifths as long as the longest, the ninth much longer than sec- 
ondaries. Tail about as long as wing, graduated for more than half 
its length, the rectrices (12) abruptly acuminate, with slender but 
barbed points conspicuously protruded (but less developed on lateral 
than on middle rectrices). Tarsus longer than whole culmen, one- 
third as long as wing, distinctly scutellate; middle toe, with claw, 
longer than tarsus; outer toe, without claw, reaching to about 
middle of subterminal phalanx of middle toe, the inner toe distinctly 
shorter; hallux as long as outer toe, much stouter; basal phalanx 
of middle toe wholly united to outer toe, for more than half to inner 
toe; claws rather large and strongly curved, very acute, that of the 
hallux much shorter than the digit. 
Coloration Above brown, the head darker and duller; throat 
buff or ochraceous; rest of under parts brown with broad guttate 
streaks of buff or ochraceous-buff; no buff or ochraceous on inner 
webs of remiges. 
Range.—Costa Rica to Peru and Bolivia. (Two species ? °) 
@ From zpépvoy, trunk of tree, and zdjooa, strike (erroneously zyyoow in original). 
b I have not seen P. stictonota (Berlepsch), from western Bolivia. 
