50. CYRTONYX. 425 



does not differ from the ordinary type ; still, it may be a similar 

 case to Penliv montana, which is no doubt only a strongly-marked 

 rufous variety of P. pcrd'w. 

 Hah. Unknown. 



a. (S ad. sk. No locality. Guuld Cull. (Type of the species.) 



56. CYRTONYX. 



Type. 



Cyrtonyx, Gould, Mon. Odontaph. pi. vii., or pt. i. 

 '(1844), Introd. p. 14 (1850) C. montezumse. 



Sexes different. Kather a full occipital crest, though none of the 

 feathers are particularly elongate. 



1st primary falls between 7th and 8th ; 4th usually slightly the 

 longest. 



Tail composed of \'2 feathers, less than half the length of the 

 wing. 



Tarsus shorter than the middle toe and claw. 



Claws very long, more curved than in Dactijlortiix. 



Range. South-eastern United States of N. America, Mexico, and 

 Central America. 



Key to the Species. 



I. .\ black-and-white patterned head. (Males.) 



a. Flauks dark grey, with a row of rounded 



paired white spots down each web 7nontezum(e, p. 4:^5. 



b. Flanks grey, with a row of rounded paired 



ruf'ous-butf or chestnut spots down each 



web sallcei, p. 427. 



c. Fbinks chestnut, irregularly barred with 



black shading into grey towards the 



margins ovellatns, p. 428. 



II. Head without black-and-white pattern. [Fe- 



nuiles.) 



1. Cyrtonyx montezumse. 



Ortvx moiitezunin\ J'itjorx, Zoo/. .Tourn. v. p. 275 (1830) [Mexico] ; 



jard. is- >Sdl>y, 111. dm. iii. pi. 12G; £onnji. P. Z. S. 1837, ^. 114. 

 Ortyx nias.sena, Le.sson, Cent. Zool. p. 189 (1830) [descr. nulla] ; id. 



ill. Zool. pi. 52 (1831). 

 Tetrao guttata, La TAavr, 7?<y/. Trim. i. p. 144 (1831) : id. La Xat. 



Met: vii. .\i)p. p. (Jo (1884). 

 Odoutophorus nicleagris, Wat/l. Isi.s, 1832, p. 277. 

 Perdix perspicillata, Licht.,Jidc Gould, Monogr. Odontoph. pt. i. text 



topi. 7 (1844). 

 Ortyx massena;, Fiusch, Abk. nat. Ver. Brem. 1870, p. 357 [Guada- 



laxara]. 

 Cyrtonyx massena, Gould, Mo7}ogr. Odontoph. pt. i. pi. 7 (1844) ; 



M'Call, Pr. Ac. Philnd. v. p. 221 (1851) ; Ca.mn, III. B. Cal. p. 21, 



pi. iv. (1853) ; Baird, U. S. S,- Me.r. Sun:, Bird.-<, p. 23 (1859) ; id. 



B. N. Ainer. p. t)47 (I860) ; Z)»y.w>% Ibix. 18lKi, p. 29 [S. Te.xas] ; 



CoHcf, P. .It: Pliilnd. 18t)H, p. 95 [Fort Whipple, .Vrizoua] ; Grai/. 



