GEOTHLYPIS. 153 
subtus omnino flava, hypochondriis olivaceis ; rostri maxilla nigra, mandibula cornea ; pedibus carneis. 
Long. tota 5-0, ale 2-4, caude 2:1, rostri a rictu 0°62, tarsi 0-9. (Descr. maris ex Volean de Chiriqui. 
Mus. nostr.) 
@ adhuc ignota. 
Hab. Panama, Volcan de Chiriqui (Arcé}). 
This bird is a close ally of the Brazilian Geothlypis velata, and an interesting one on 
that account, its relationship with that species being closer on the whole than with 
G. equinoctialis, its nearest neighbour in point of locality. An attempt to account for 
this peculiar distribution has already been made!; but as the question will have to be 
discussed in a more general way in the introduction to this work, it would be superfluous 
to refer to it here. 
Like G. velata this species has the feathers of the postocular region grey ; but it differs 
from its ally in the much greater extent of the black on the forehead. 4G. equinoctialis 
has the postocular area olive-coloured, thus differing from both the above-named species. 
Since describing the type, which was then unique, other specimens have reached us, 
all of them bearing the distinctive characters of G. chiriquensis. 
The type specimen is now figured. 
5. Geothlypis caninucha. (Tab. IX. fig. 2.) 
Geothlypis poliocephala, var. caninucha, Baird, Brew. & Ridgw. N. Am. B. i. p. 296°. 
Geothlypis polocephala, Baird, Rev. Am. B. i. p. 225, partim’; Lawr. Ann. Lye. N. Y. ix. p. 200°; 
Salv. Ibis, 1870, p. 114°. 
Geothlypis equinoctialis, Salv. & Scl. Ibis, 1860, p. 278° (nec Gmelin). 
Supra olivacea, alis et cauda concoloribus ; capite summo et regione postoculari griseis; fronte anguste, loris 
et plumis subocularibus nigris ; subtus flava, hypochondriis ochrascescentioribus ; rostro robusto incurvo, 
maxilla fusca, mandibula flavida ; pedibus carneis. Long. tota 5-7, ale 2°4, caude 2:6, rostri a rictu 0:6, 
tarsi 0:93. (Descr. maris ex Costa Rica. Mus. nostr.) 
aut ¢ juv. mari similis, sed capite inornato dorso concolori. 
Hab. Mexico, Merida (Schott *)?; British Honpuras (Blancaneaux); Guatemana, 
Retalhuleu, Patio Bolas, Duefias®, San Geronimo (0. 8. & F. D. G.); Costa Rica 
(J. Carmiol*). 
Specimens of this bird were first obtained at Duefias in Guatemala; but they were 
referred to the South-American G. equinoctialis*®, the differences between them not 
being then recognized. Other examples were afterwards found in Guatemala in various 
localities ranging in altitude from 800 to 5000 feet above the sea-level ; but it is not a 
~common bird anywhere in that country. Its chief place of resort is in low scrubby 
second-growth woods, and often near water, its habits much resembling those of 
Geothlypis trichas. 
Costa-Rica specimens agree accurately with Guatemalan ones; but, as already stated, 
the Mexican bird is distinguished by its white eyelids. 
BIOL. CENT.-AMER., Aves, Vol. 1, August 1881. 20 
