164 DENDROCOLAPTIDA. 
XENOPS. 
Xenops, Illiger, Prodr. p. 213 (1811); Scl. Cat. Birds Brit. Mus. xv. p. 110. 
An easily recognized genus from the peculiar form of the bill, the culmen of which 
is straight, the tomia of both maxilla and mandible ascending in a gradual curve, and 
the lower edge of the mandible is also curved rather abruptly upwards, the whole bill 
being much compressed in the middle. 
Only two species are now admitted of the genus Xenops, though others have been 
claimed as distinct. Their ranges are nearly coincident, and extend over the greater 
part of Tropical America. X. rutilus, however, only reaches Costa Rica, whereas 
X. genibarbis spreads northwards to Eastern Mexico. 
The wings of both species are coloured in the same way as those of Sittosomus, 
Margarornis, and Glyphorhynchus—that is to say, they have a tawny transverse band 
extending to all but the three outer primaries. The anterior toes are all closely united 
at the base; the middle toe considerably exceeds the lateral toes in length and isa 
little longer than the hallux. The tail is soft at the end and the feathers rounded; 
the coloration of the tail is peculiar, being cinnamon, with the inner webs of the 
third and fourth feathers from the outside black. 
1. Xenops genibarbis. 
Xenops genibarbis, Il. Prodr. p. 218*; Temm. Pl. Col. 150. f.1?; Sel. & Salv. P. Z. 8S. 1879, 
p- 523°; Sel. Cat. Birds Brit. Mus. xv. p. 110‘. 
Xenops mexicanus, Scl. P. Z.S. 1856, p. 289°; 1859, p. 382°; Lawr. Ann. Lye. N. Y. vii. p. 8207; 
ix. p. 106°; Salv. Ibis, 1861, p. 353°; P. Z. 8. 1867, p. 143°; 1870, p. 192"; Sel. & Saly. 
P. Z.S. 1864, p. 354"; Nomencl. Av. Neotr. p. 66%; Frantz. J. £. Orn. 1869, p. 304" ; 
Sumichrast, Mem. Bost. Soc. N. H. i. p. 555; La Nat. v. p. 247 *; Sanchez, An. Mus. 
Nac. Mex. i. p. 977. 
Supra rufescenti-brunneus, capite obscuriore, uropygio ferrugineo-rufo, loris albicantibus, stria superciliari 
elongata pallide cervina, regione auriculari brunnea cervino striato infra eam plaga elongata nitide alba: 
subtus brunneus, gula albicante; alis nigris cinnamomeo terminatis, secundariis intimis cinnamomeis, 
fascia lata mediana obliqua per remiges interiores et secundarios proximos transeunte cinnamomea, 
remigibus externis extus cinnamomeo limbatis, subalaribus quoque cinnamomeis; cauda cinnamomea, 
rectricibus duabus utrinque mediis proximis nigris, duabus iis exterioribus ad basin gradatim nigris: 
rostro et pedibus corylinis, illius mandibula pallidiore et infra albicante. Long. tota 5:0, ale 2-7, 
caude rectr. med. 21, rectr. lat. 1:6, rostri a rictu 0°63, tarsi 0°6. (Descr. maris ex Teapa, Mexico. 
Mus. nostr.) 
¢ mari similis. 
Hab. Mexico, Vera Cruz (Sanchez 1"), Cordova (Sallé4), Playa Vicente (Boucard ®), 
Uvero (Sumichrast '°), Teapa (Mrs. H. H. Smith); Brrtisa Hoypvras, Orange 
Walk (Gawmer), Cayo (Blancaneaux) ; GuatemaLa, Choctum (0. 8. & F. D. G. 9); 
Costa Rica, Angostura, San José, Pacuar, and Grecia (Carmiol 8), Tucurriqui 
(Arcé); Panama, Bugaba!!, Bibalaz, Calovevora 1, Santa Fé 1° (Arcé), Lion Hill 
