390 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Dactylortyx . thoracicus fuscus Conover, Proc. Biol. Soc. Washington, 1, 1937, 73 

 (Alto Cantoral, Tegucigalpa, Honduras; descr. ; crit. ; distr.)., 74 (spec; Alto 

 Cantoral, Cantoral, Rancho Quemado, San Juancito, all in Honduras). — 

 Hellmayr and Conover, Cat. Birds Amer., i, No. 1, 1942, 284 (syn. ; distr.). 



Genus CYRTONYX Gould 



Cyrtcmyx Gould, Monogr. Odontoph., pt. i, 1844, pi. [2] and text (^ pi. 7 of 

 bound volume). (Type, by monotypy, Ortyx massena Lesson = O. monte- 

 zumae Vigors.) 



Odontophorus Reichenow, Die Vogel, i, 1913, 316, part. 



Medium-sized, very short-tailed Odontophorinae (wing about 117-135 

 mm.) with tips of outstretched toes extending far beyond tip of the short, 

 soft, nearly concealed tail, tips of lateral claws extending far beyond base 

 of middle claw, tarsus less than one-fourth as long as wing, with a full 

 occipital crest of soft, broad, blended and decurved (decumbent) feathers, 

 sides and flanks spotted or barred (the head grotesquely striped and 

 banded with white and black in adult males), and sexes wholly unlike in 

 coloration. 



FiGimE 22. — Cyrtonyx montesimiae. 



Bill moderate in size, the chord of culmen (from extreme base) de- 

 cidedly more than half the length of tarsus ; depth of bill at base greater 

 than distance from anterior end of nasal fossa to tip of maxilla, and 

 exceeding width of bill at rictus; culmen strongly convex proximally, 

 less so distally broadly, or not distinctly ridged ; gonys moderately broad, 

 nearly straight, strongly ascending terminally. Outermost primary a 

 little shorter than seventh (from outside), the third and fourth longest. 

 Tail decidedly less than half as long as wing, graduated, the rectrices 

 (12) soft, tapering terminally, the longest scarcely longer than and 

 hardly distinguishable from the coverts. Tarsus only one-fourth as long 

 as wing, much shorter than middle toe with claw, the planta tarsi with 



