THE HARLEQUIN QUAILS. 145 
and the general colour of both upper- and under-parts is 
darker. Measurements as in O. coyolcos. 
Adult Female.—Differs from the female of O. coyolcos in being 
altogether darker, the grey markings of the mantle being re- 
placed by brownish-black. Total length, 7:4 inches ; wing, 
4; tail, 2°3 ; tarsus, 1°1 ; middle toe and claw, 1°35. 
Range.—Putla, Western Mexico. 
VIII. THE CHESTNUT-COLOURED COLIN. ORTYX CASTANEUS. 
Ortyx castaneus, Gould, P. Z. S. 1842, p. 182, id. Monogr. 
Odontoph. pt. ii, pl. 3 (1850); Ogilvie-Grant, Cat. B. 
Brit. Mus. xxii. p. 424 (1893). 
Adult Male-—Top of the head, mantle, chest, and general 
colour of the rest of the upper-parts dark chestnut, the chin and 
throat lack ; middle of the breast and belly white, barred 
with black and mixed with chestnut. Total length, 9 inches ; 
wing, 4; tail, 2°3 ; tarsus, 1°1; middle toe and claw, 1°35. 
But a single example of this bird is known—Gould’s type pre- 
served in the British Museum Collection. The locality and 
other particulars are wanting. It has been suggested by 
some American ornithologists that the specimen in question 
is merely a-strongly-marked variety of O. wirginianus, and it 
may possibly transpire that it is so. In support of this theory 
we may remind our readers that the so-called Mountain Par- 
tridge (see vol. 1. p. 147, pl. xii.) is undoubtedly nothing but a 
strongly-marked rufous variety of the Common Partridge. 
THe LARLEQUIN-QUAILS., GENUS CYRTONYX. 
Cyrtonyx, Gould, Monogr. Odontoph. pl. 7 in pt. i. (1844), 
Introd. p. 14 (1850), 
Type, C. montezume (Vig.). 
Sexes differ in plumage. A rather full crest, but none of 
the feathers very elongate. 
2 L 
