150 LLOYD'S NATURAL HISTORY. 
I. THE LONG-NAILED PARTRIDGE. DACTYLORTYX 
THORACICUS. 
Ortyx thoracicus, Gambel, P. Ac. Philad. iv. p. 77 (1848). 
Odontophorus lineolatus, Gould, Monogr. Odontoph. pt. ul. pl. 
32 (1850). 
Dactylortyx thoracicus, Ogilvie-Grant, Cat. B. Bit. Mus. xxii. 
p- 429 (1893). 
Adult Male—Crown, nape, and mantle reddish-brown, mixed 
with black, and with pale shoulder-stripes ; shoulder-feathers 
and wings very similar but largely mixed with black ; lower 
back and rump mostly olive-brown ; eyebrow-stripes, cheeks, 
and throat, zeddish-chestnut ; a black patch on the sides of the 
throat; under-parts grey, tinged with reddish-brown, and with 
white shafts; middle of belly and vent white. ‘Total length, 
@ inches ; wing, 5°3; tail, 2°2; tarsus, 1:3; middle toesand 
claw, 1°7. 
Adult Female——Upper-parts much like those of the male ; 
eyebrow-stripes and cheeks gveyish-white; throat white ; chest 
and breast du// brick-red, with pale shafts. Slightly smaller. 
Range.— Central America; Southern Mexico, Yucatan, Guate- 
mala, and San Salvador. 
Habits—According to Mr. Salvin, “this is perhaps the 
commonest Partridge found on the Volcan de Fuego. The 
ravines of this volcano are localities very favoured by several 
species of the group. Itis not often, however, that they are 
to be found actually at the bottom of the hollow, where the 
increasing shadow and height of the overhanging trees render 
the undergrowth of vegetation comparatively scanty, but most 
frequently near the top of either side, in places where a fallen 
tree or aslip of soil has laid bare a sunny spot. Such situations 
are sought for by these birds to bask and sleep in, like Par- 
tridges ina warm hedge-side. ‘They are, however, true forest- 
birds, and are usually met with in small flocks of six or eight, 
probably the brood of the season. 
