EUPSYCHORTYX. 297 
3. Kupsychortyx nigrogularis. 
Ortyx nigrogularis, Gould, P. Z. 8. 1842, p. 181; Monogr, Odontoph. t. 4°; Gray, Gen. Birds, 
il. p. 514, t. 132°; Moore, P. Z. S. 1859, p. 634; Sel. & Salv. This, 1859, p. 225°; Lawr. 
Ann. Lye. N. York, ix. p. 209°; Boucard, P. Z S. 1883, p. 4617. 
Colinus nigrogularis, Stone, Pr. Ac. Philad. 1890, p. 204°; Nelson, Auk, xv. p. 122°. 
Eupsychortyx nigrogularis, Graut, Cat. Birds Brit. Mus. xxii. p. 412°; Handb. Game-Birds, ii. 
p. 183%. 
Colinus nigrogularis segoviensis, Ridgw. Pr. U. 8. Nat. Mus. x. p- 593”, 
E. leylandi similis et gutture nigro, sed interscapulio et collo postico et laterali castaneis albo ocellatis ; pileo 
brunneo, fascia laterali utrinque alba; fascia altera superciliari nigra; regione parotica et suboculari albis ; 
gutture imo et pectore toto albis, plumis nigro marginatis quasi squamatis; corporis Jateribus castaneis, 
plumis late medialiter albis. Long. tota circa 7°8, ale 4:3, caude: 2:2, culm. 0°6, tarsi 1-15. 
2 E, leylandi Q similis, sed pileo brunneo nigro striolato, gutture imo et prepectore albo ocellatis, plumis 
nigro marginatis, corpore reliquo subtus nigro fasciato distinguendus. Long. tota circa 7°5, ale 4:0. 
(Descr. maris et feminze ex Buctzotz, Yucatan. Mus. nostr.) 
flab. Mexico, Yucatan (Dyson?, Cabot®), Chablé, Tizimin, Buctzotz, and Peto 
(Gaumer™ 1°), Merida (Schott ° 10), Izamal (Stone & Baker’); Brrrisn Honpuras, 
Belize (Leyland+*) ; Honpuras (Dyson?) ; Nicaragua, Segovia River (Zownsend 12), 
£. nigrogularis has a black throat like Z. leylandi, but is easily recognized by the 
colour of the under surface, which is for the most part white, the feathers being 
margined with black, imparting a scaled, rather than an ocellated, appearance to the 
bird. The chestnut mantle, with the pear-shaped white centres to the feathers, and 
the white ear-coverts are also distinguishing characteristics of this species. The 
females of the two birds are very similar, both having ochraceous throats and eye- 
brows, but the hen of H. nigrogularis is readily distinguished by the absence of black 
streaks on the throat, and by its ocellated lower throat and fore-neck, with none of 
the vinaceous-brown shade which is apparent in LZ. leylandi. 
Dr. Cabot *, who observed the species in Yucatan, gives an account of its habits. 
He states that its call so precisely resembles that of Ortyx virginianus that by imitating 
the call of the latter species a covey previously scattered will respond and may be 
easily found. The mode of roosting of the two birds is also similar, both occasionally 
perching on trees. The Maya or Indian name for E. nigrogularis is “ Béch,” the “ e” 
being pronounced with a guttural sound. This is undoubtedly the bird offered by the 
natives as sacrifices to their idols, and mentioned in the works relating to the discovery 
and conquest of Yucatan?. According to Gaumer’, it is sometimes found in dense 
forest, but more frequently in maize-fields. Dyson? says that the species is common 
in Yucatan and on the pine-ridges of Honduras. 
4. Hupsychortyx hypoleucus. 
Eupsychortyx hypoleucus, Gould, P. Z.S. 1860, p. 62°; Grant, Cat. Birds Brit. Mus, xxii. p. 413°; 
Handb. Game-Birds, ii. p. 134°. 
Eupsychortyx leucopogon, Saly. & Scl. (nec Less.), Ibis, 1860, p. 277 *. 
B1OL. CENTR.-AMER., Aves, Vol. III., February 1903. 38 
