BIRDS OF NORTH AND MIDDLE AMERICA. 283 
Centr.-Am., Aves, ii, 1891, 176, part (Chiriquf, Chitra, and Calovévora, 
Panamé). 
[Sittasomus] sylvioides SHarpe, -Hand-list, iii, 1901, 77, part (Panam4). 
Sittasomus levis Banas, Proc. New Engl. Zool. Club, iii, Jan. 30, 1902, 46 (Boquete, 
Chiriqui, Panama, alt. 4,000 ft.; coll. E. A. and O. Bangs). 
SITTASOMUS SYLVIOIDES JALISCENSIS Nelson. 
JALISCO SITTASOMUS. 
Similar to 8. s. sylvioides but much larger, and color of under 
parts slightly darker. 
Adult male-—Length (skin), 167; wing, 84; tail, 81; culmen, 16.5; 
tarsus, 18.5; middle toe, 12.% 
Southwestern Mexico, in State of Jalisco (San Sebastian). 
Sittasomus sylvioides (not of Lafresnaye) Nrtson, Auk, xv, 1898, 156 (San Sebas- 
tidén, Jalisco). 
Sittasomus sylvioides jaliscensis Netson, Auk, xvii, July, 1900, 264 (San Sebas- 
tidn, n. w. Jalisco; coll. U. 8. Nat. Mus.). 
[Sittasomus] jaliscensis SHarpe, Hand-list, iii, 1901, 77. 
Genus DECONYCHURA Cherrie. 
Deconychura 6 CuErriz, Proc. U. 8S. Nat. Mus., xiv, no. 855, Sept. 4, 1891, 338. 
(Type, D. typica Cherrie.) 
Medium sized or rather small Dendrocolaptide (length about 170 
mm.) with narrow operculate nostrils, tail equal to or longer than 
wing, graduated for about half its length, with the very rigid shafts 
of rectrices strongly decurved subterminally, and with culmen 
(from base) longer than tarsus, and inner webs of remiges without 
any buffy or ochraceous cross-band. 
Bill nearly as long as head, straight, rather stout, broad and 
depressed basally, its width at latero-frontal antie much greater 
than its depth at same point and equal to a little less than half the 
distance from nostril to tip of maxilla; culmen distinctly ridged, 
straight for basal half or more, gradually but decidedly decurved 
terminally; tomia slightly but distinctly decurved terminally, with- 
out trace of notch; gonys faintly convex basally, straight or even 
very faintly concave distally. Nostril exposed, posteriorly in con- 
tact with latero-frontal feathering, narrowly ovate or elliptical, 
longitudinal, margined above by a rather narrow membraneous 
operculum. Rictal bristles obvious but very small, and feathers of 
chin and lores with minute terminal sete. Wing rather long and 
pointed, with longest primaries exceeding secondaries by less than 
length of exposed culmen; eighth primary longest, the seventh 
and sixth, successively, but little shorter, the tenth (outermost) 
nearly three-fourths as long as the longest, the ninth shorter than 
sixth. Tail equal to or slightly longer than wing, graduated for 
@ One specimen (the type). 
b Derived from déka ten, dé claw, and odpé tail. 
