BIRDS OF NORTH AND MIDDLE AMERICA. 87 



MIMOCICHLA RAVIDA Cory. 

 GRAND CAYMAN THRUSH. 



Adults (sexes alike) . — Uniform bluish slate-gray or deep plumbeous, 

 including wings and tail, the lores very slightly darker; lower central 

 portion of abdomen, anal region, under tail-coverts, and terminal 

 portion of inner webs of rectrices (except middle pair) white; bill, 

 bare orbital space, legs, and feet, yellowish (bright orange or orange- 

 red in life?). 



Young. — Wings and tail as in adults; rest of upper parts grayish 

 brown, the feathers of pileum with narrow (sometimes very indis- 

 tinct) shaft-streaks of paler buffy brown; anterior and lateral under 

 parts light wood brown, the abdomen buffy white, indistinctly spotted 

 or clouded with pale grayish brown or buffy brown ; under tail-coverts 

 white. 



Adult male. — Length (skin), 247; wing, 130; tail, 123; exposed 

 culmen, 26.5; tarsus, 40.5; middle toe, 23.5." 



Adult female. — Length (skin), 245; wing, 127; tail, 122; exposed 

 culmen, 28; tarsus, 42; middle toe, 23.5.'* 



Island of Grand Cayman (south of Cuba), Greater Antilles. 



Mimodchla ravida Cory, Auk, iii, no. 4, Oct., 1886, 499, 501 (Grand Cayman 

 Greater Antilles; coU. C. B. Cory); v, 1888, 156; Birds West I nd., 1889, 285; 

 Cat. West Ind. Birds, 1892, 19, 122, 129, 157 (Grand Cayman). 



[Mimodchla] ravida Sharpe, Hand-list, iv, 1903, 116. 



Genus HAPLOCICHLA Ridgway. 



Haplodchlab Ridgway, Proc. Biol. Soc. Wash., xviii, Oct. 17, 1905, 212. (Type, 

 Turdus aurantius Gmelin.) 



Medium-sized Turdidse resembling and nearly related to Mimo- 

 cicMa but differing' in relatively much shorter wing (less than three 

 times as long as tarsus instead of nearly three and a half times as long), 

 relatively shorter and much less rounded tail (graduation less than 

 length of gonys) , feathered eyelids, absence of white on rectrices and 

 presence of white on wings, and general plain grayish brown coloration. 



Bill shorter than head, compressed terminally, somewhat depressed 

 basally, its height at frontal antiae equal to its width at same point; 

 exposed culmen slightly longer than middle toe (without claw), 

 straight for about terminal half, then gradually and increasingly 

 decurved terminally, the tip of maxilla obviously uncinate; gonys 

 slightly convex, ascending terminally, slightly longer than mandibular 

 rami, the latter distinctly narrower than middle portion of mandible; 

 maxillary tomium nearly straight, distinctly notched subterminally. 

 Nostril narrowly oval or elliptical, posteriorly in contact with latero- 

 frontal feathering, margined above by a very narrow concave mem- 

 brane. Rictal and post-nasal bristles well developed; loral feathers 



a One specimen. b'^TrAou?, simple, plain; Kix^J?, a thrush or thrush-like bird. 



