THE TARRED PARTRIDGES. 127 



neck, and upper mantle with a triangular chest?iut spot at the 

 end of each feather ; inner wing-coverts, shoulder-feathers, 

 sides, and flanks sitnilarly marked^ but with a white spot or 

 partial margin on each web ; breast and belly with ro2i7id while 

 spots. Total length, 9*3 inches; wing, 4-4; tail, 3-2; tarsus, 

 1*2 ; middle toe and claw, 1-4. 



Adult Female. — Crest generally dark brow7i ; throat ivkite, iviih 

 dark shaft-stripes ; under-parts greyish-brown with round while 

 ipots. 



Range. — Western Mexico; States of Sonora, Sinaloa, and 

 Jalisco. 



THE BARRED PARTRIDGES. GENUS PIIILORTYX. 



Phiioftyx, Gould, Monogr. Odontoph. pi. 14 in pt. ii. (1846); 

 Introd. p. 17 (1850). 



Type, P. fasciatus (Gould). 



Sexes similar in plumage. A well-developed crest extending 

 much beyond the feathers of the head. 



First primary flight-feather i7itermediate i?i le?igth between 

 the ninth and tenth ; fourth slightly the longest. 



Tail composed of tivelve feathers, nearly th^-ee-fourths of the 

 length of the wing. 



Tarsus shorter than the middle toe and claw. 



Only one small species is known. 



I. THE MEXICAN BARRED PARTRIDGE. PHILORTYX FASCIATUS. 



Ortyx fasciatus, Natterer, MS.; Gould, P. Z. S. 1843, p. 133. 

 Ortyx perrotiafta, Des Murs, Rev. Zool. 1845, P- ~^1- 

 Philortyx fasciatus, Gould, Monogr. Odontoph. pt. ii. pi. 14 

 (1846); Ogilvie-Grant, Cat. B. Brit. Mus. xxii. p. 406 



(1893). 

 Philortyx personatus, Ridgw. Auk, iii. p. 2>ZZ (1886). 



Adult. — Crest blackish-brown tipped with rufous ; neck and 

 mantle olive-grey, shading into olive-brown on the back, which 



