BIRDS OF NORTH AND MIDDLE AMERICA 379 



[Odontophorus] leucolaemus Gray, Hand-list, ii, 1870, 272, No. 9763.— Sclater and 



Salvin, Norn. Av. Neotr., 1873, 138.— Sharpe, Hand-list, i, 1899, 47. 

 Odontophorus smithians Oberholser, Proc. Biol. Soc. Washington, xlv, 1932, 39 (San 



Joaquin de Dota, Pacific watershed, Costa Rica, altitude 4,000 feet, coll. H. O. 



Havemeyer; descr. ; meas. ; crit.).— Griscom, Auk, 1, 1933, 298 (crit. ; melanism 



of O. leucolaemus). 



Genus DACTYLORTYX Ogllvie-Grant 



Dactylortyx Ogilvie-Grant, Cat. Birds Brit. Mus., xxii, 1893, 429. (Type, by 



original designation, Ortyx thoracicus Gambel.) 

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



Medium-sized, very short-tailed Odontophorinae (wing about 130-135 

 mm.) with outstretched tarsi extending beyond tip of tail, claws very 

 long, relatively slender, slightly curved, and blunt, those of lateral toes 

 extending much beyond middle of middle claw, tarsus more than one- 

 fourth as long as wing, rectrices firm, broad, rounded at tips, feather of 

 decumbent crest distinctly outlined, and sexes not conspicuously different 

 in coloration. 



Bill relatively rather small and slender, the chord of culmen (from 

 extreme base) equal to nearly half the length of tarsus ; the depth of bill 

 at base not exceeding distance from anterior end of nasal fossa to tip 

 of maxilla and a little less than width of bill of rictus; culmen rather 

 strongly convex, narrowly and rather distinctly ridged; gonys relatively 

 narrow but rounded transversely, straight or very nearly so, slightly 

 ascending terminally, its basal angle not prominent. Outermost primary 

 intermediate between seventh and eighth (from outside), the fourth and 

 fifth longest. Tail two-fifths as long as wing, moderately rounded, the 

 rectrices (12) rather firm, broad, and rounded at tips; very distinct from 

 coverts. Tarsus a little more than one-fourth as long as wing, shorter 

 than middle toe with claw, its lower end, when feet are outstretched, ex- 

 tending much beyond tip of tail ; planta tarsi with numerous rather large 

 longitudinally hexagonal scales, these along the posterior edge (on both 

 sides) rather larger and more quadrate, with a tendency to form a con- 

 tinuous row ; claws very long (that of middle toe longer than basal phalanx 

 of the toe, nearly as long as culmen), slender, slightly curved, and blunt. 



Plumage and coloration. — Feathers of crown and occiput moderately 

 elongated, forming, when erected, a bushy crest of moderately broad de- 

 cumbent or decurved feathers with plane surface and rounded tips; a 

 narrow naked space beneath lower eyelid. Upperparts finely mottled 

 brown and grayish, the hindneck broadly streaked with bufif and brownish 

 black, the scapulars and tertials with large black spots or blotches on 

 inner webs, the former with rather broad mesial streaks of whitish; 

 chest, sides, and flanks light brownish gray or drab, broadly streaked 

 with dull whitish, the abdomen dull white or bufify white; adult male 

 with broad superciliary stripe, malar region, chin, and throat uniform 



