208 NORTH AMERICAN BIRDS. 
d?. Sexes unlike in color; male uniform black, female black, vermicu- 
lated or irregularly barred with rufous............c0+ Penelopina, 
ce. Smaller (length less than 2 feet); throat without median “ dewlap”; plu- 
mage plain, the tail with whitish or rufous tip. Ortalis. (Page 208.) 
a’, Cere densely covered with erect velvet-like feathers, concealing the nostrils; 
upper part of tarsi feathered in front and on sides. (Subfamily Oreophasine.) 
Male with a tubercular vertical horn on top of head............000 Oreophasis 
Genus ORTALIS Mernem. (Page 208, pl. LXI, fig. 2.) 
Species. 
Common Cuaracters (of Mexican and Central American species).—Above plain 
olive-brownish or olive-grayish, the tail darker and with a distinct greenish or 
bluish gloss; anterior lower parts colored like upper surface, the rest of lower parts 
different (chestnut-rufous, light brownish, or dull whitish). 
a, Head with a conspicuous crest, the anterior feathers of which incline forward, 
over base of bill; posterior lower parts and tips of tail-feathers chestnut- 
rufous; length about 2 feet (or more), wing 9.50-10.50, tail 11.00-12.00. 
Hab. Western Mexico, north to Sonora. 
O. wagleri GRay. Wagler’s Chachalaca.3 
a, Head not conspicuously crested, all the feathers reclining backward; posterior 
lower parts and tips of tail-feathers pale brownish, light ochraceous, or 
whitish. 
6’. Quills olive, or olive-grayish. 
ce. Wing not more than 8.50; feathers of neck blended; under tail-coverts 
isabella-color, or buffy brownish ; tip of tail varying from isabella- 
color to white. 
@. Belly dull light brownish or else pure white. 
é. Tip of tail white. 
f’. Belly pure white; length about 16.50, wing 7.30, tail 8.00. 
Hab. West coast of Guatemala and Nicaragua. 
O. leucogastra (GOULD). White-bellied Chachalaca.‘ 
f?. Belly dull fulvous-brown, or isabella-color. Adult: Above 
plain grayish olive, faintly glossed with bronzy green- 
ish, more dull slaty on head and neck; tail dusky bronzy 
greenish, changing to dull bluish, broadly tipped with 
white, except middle feathers; middle line of throat 
blackish ; lower parts generally dull brownish, some- 
what paler on middle of belly, but deepening into more 
decided, or more fulvous, brownish on flanks and under 
1 Penelopina Reicu., Tauben. 1862, 152. Type, Penelope nigra Fras. 
2 Oreophasis Gray, Gen. B. iii. 1844, 485. Type, O. derbianus Gray. 
3 Ortalida wagleri Gray, List Gallin. Brit. Mus. 1867, 11. 
4 Penelope leucogaster GouLp, P. Z. 8. 1843, 105. Ortalida leucogastra Gray, List Gallin. Brit. Mus. 
1867, 13. 
