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 bein"- 

 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, I'l ; middle toe and claw, 1*35. 



Eange. — Putla, Western Mexico. 



VIII. THE CHESTNUT-COLOURED COLIN. ORTYX CASTANEUS. 



Oi'tyx castanens, Gould, P. Z. S. 1842, p. 182, id. Monogr. 

 Odontoph. pt. iii. pi. 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 chest?mt, the chin and 

 throat black ; middle of the breast and belly white, barred 

 with black and mixed with chestnut. Total length, 9 inches ; 

 wing, 4 ; tail, 2*3 ; tarsus, I'l ; 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. virgima?ms, 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. i. p. 147, pi. xii.) is undoubtedly nothing but a 

 strongly-marked rufous variety of the Common Partridge. 



THE HARLEQUIN QUAILS. GENUS CYRTONYX. 



Cyrt07iyx, Gould, Monogr. Odontoph. pi. 7 in pt. i. {1844), 

 Introd. p. 14 (1850). 



Type, C. 77i07itezum(2 (Vig.). 



Sexes differ in plumage. A rather full crest, but none of 

 the feathers very elongate. 



12 L 



