BIRDS OF NORTH AND MIDDLE AMERICA. 135 



Genvxs RIDGWAYIA Stejneger. 



Ridgwayia Stejneger, Proc. U. S. Nat. Mus., v, Feb. 13, 1883, 460. (Type, 

 Turdus pinicola Sclater.) 



Medium-sized Turdidas (length about 200-230 mm.) with wing 

 more than five times as long as tarsus, the latter shorter than middle 

 toe with claw, and inner webs of remiges marked by a very broad 

 basal band of white. 



Bill much shorter than head, rather stout, its height at frontal 

 antise equal to half the distance from nostril to tip of maxilla and 

 quite equal to its width at same point; exposed culmen about equal 

 to outer toe with claw, straight basally, then gradually and rather 

 strongly decurved to the tip; gonys equal in length to mandibular 

 rami, straight, ascending terminally; maxillary tomium nearly 

 straight or faintly concave at or anterior to middle, distinctly notched 

 subterminally. Nostril broadly oval, posteriorly in contact with 

 latero-frontal feathering, margined above by narrow membrane. 

 Rictal and decumbent post-nasal bristles well-developed; feathers' 

 of lores and chin with small bristle-like points. Wing long and 

 pointed, the longest primaries exceeding longest secondaries by com- 

 bined length of tarsus and middle toe (without claw) ; outermost 

 (tenth) primary much shorter than primary coverts, less than one- 

 fourth as long as ninth, the latter nearly equal to (sometimes longer 

 than) sixth, the eighth and seventh ecpial and longest; three prima- 

 ries (eighth, seventh, and sixth), with outer web sinuated. Tail a 

 little less than two-tliirds as long as wing (about equal to distance 

 from bend to end of secondaries), slightly double-rounded. Tarsus 

 short and stout, less than one-fifth as long as wing, less than one- 

 third as long as tail, the acrotarsium fused on both sides; middle toe 

 (without claw) more than three-fourths as long as tarsus; lateral toes 

 decidedly unequal, the inner (without claw) reaching to or very 

 slightly beyond sul)terminal articulation of middle toe, the outer 

 slightly farther; hallux slightly shorter than inner toe but much 

 stouter; basal phalanx of middle toe adherent for rather more than 

 half its length to outer toe, for nearly half to inner toe; claws normal, 

 that of the hallux much shorter than its digit. 



Coloration. — General color brown, this more or less streaked with 

 paler; wings and tail black, much varied with white; under parts of 

 body white; sexes decidedly different, the male having the whole 

 throat and chest deep sooty brown, the female with throat mostly 

 whitish, the chest light graA^sh brow^n narrowly streaked ^yith. 

 wdiitish, the pileum and middle line of back streaked with pale 

 brow^nish. Young very different from adults, the pileum, back, etc., 

 sooty blackish conspicuously streaked with buff, the under ])arts buff' 

 conspicuously streaked and squamated with l)lack, especially on 

 chest. 



