644 Annals of the Carnegie Museum. 



Bangs Collection : El General de Terraba, Tenorio, Coralillo, Bolson, 



La Vijagua and Pozo Azul de Pirris (Underwood). 

 C. H. Lankester Collection : Tuis, Miravalles, and El Hogar. 

 Carnegie Museum : Guapiles (Carriker & Crawford); Pozo Azul de 

 Pirris, Carrillo El Pozo de Terraba, El Hogar, Boruca, Buenos 

 Aires (Carriker); P6zo Azul de Pirris (Underwood). Eighteen 

 skins. 



Birds from British Honduras seem to differ slightly from specimens 

 from southwestern Costa Rica in being deeper olive-brown below and 

 ruddier above, with thesubmalar streak averaging longer and broader. 

 Apparently Costa Rican birds are not typical mexicanus, being about 

 intermediate between X. genibarbis genibarbis of Colombia and the 

 northern bird (taking British Honduras specimens as typical mexi- 

 canus). Birds from southwestern Costa Rica are on the average 

 paler than those from the northern and eastern sections and are prob- 

 ably a little nearer true genibarbis than X. g. tnexicanus. However, 

 the greater portion of Costa Rican specimens are referable to mexi- 

 canus, and I have accordingly called them all by that name. 



The species ranges over the whole of the lower portions of both 

 Caribbean and Pacific slopes as well as the lowlands proper, and has 

 been recorded from as high as 3,000 feet on the eastern slope, but 

 very rarely from that elevation on the western side. It is exclusively 

 a bird of the forest, but does not as a rule go up very high in the trees, 

 preferring the tangled masses of vines and underbrush to the more 

 open forest. 



380. Xenops rutilus Lichtenstein. 



Xenops rutilus Lichtenstein, Verz. Doubl., 17 (South Brazil). — Sclater, 

 Cat. Birds Brit. Mus., XV, 1890, in (Costa Rica to Brazil and Bolivia; 

 Costa Rica [Carmiol], one ad. $ , coll. Salvin and Godman). — Salvin and 

 Godman, Biol. Centr.-Am., Aves, II, 1891, 165 (Costa Rican references). 



Xenops heterurus Salvin, Ibis, 1869, 319 (Costa Rica [Carmiol], coll. Salvin 

 and Godman). 



There is but one specimen known from Costa Rica of this species of 

 Xenops, and were it not for the unquestionable authenticity of that 

 record I would hesitate to include the species in the Costa Rican 

 ornis. At best it must be classed only as a very rare straggler so far 

 north. Unfortunately the specimen collected by Carmiol has no 

 locality indicated other than Costa Rica. 



