BIRDS OF NORTH AND MIDDLE AMERICA 79 



Rallus ieldingi Ridgway, Proc. U. S. Nat. Mus., v, 1882, 345 (Espiritu Santo 

 Island, Lower California; coll. U. S. Nat. Mus.); Bull. Nutt. Orn. Club, 

 vii, 1882, 258.— Reichenow, Journ. fur Orn., xxxi, 18S3, 402 (reprint of 

 orig. descr. ) .— Belding, Proc, U. S. Nat. Mus., v. 1883, 545 (rare; southern 

 Louver California). — Baird, Brewer, and Ridgway, Water Birds North 

 Amer., 1, 1884, 356. — American Ornithologists' Union, Clieck-list, 1886, 

 and ed. 2, 1895, No. 209; ed. 3, 1910, p. 102.— Brewster, Bull. Mus. Comp. 

 Zool., xli, 1902, 55 (near La Paz, Lower California). — Cooke, U. S. Dept. 

 Agr. Bull. 128, 1914, 17, fig. 6, map (range and migration routes).— Anthony, 

 Proc. California Acad. Sci., ser. 4, xiv, 1925, 291 (mangroves at Magdalena 

 Bay, Mexico). — Bancroft, Condor, xxix, 1927, 47, 48 in text (breeding at 

 Scammons Lagoon, Lower California).— Bent, U. S. Nat. Mus. Bull. 135, 

 1927, 266 (life hist. ; monogr. ) .— Huey, Condor, xxix, 1927, 241 in text (San 

 Ignacio Lagoon, Lower California). — Grinnell, Univ. California Publ. 

 Zool., xxxii. No. 1, 1928, 86 (distr. ; Lower Calif.). — Rowley, Condor, xxxvii, 

 1935, 163 (nest and 7 eggs, near La Paz, Lower California, May 3). — 

 Obekholser, Proc. U. S. Nat. Mus., Ixxxiv, 1937, 314 in text. 



Rlallus^leUingl Ridgway, Man. Nortli Amer. Birds, 18S7, 138. 

 [Rallus'\ heldingi Shaepe, Hand-list, i, 1899, 93. 



[Rallus elegans] subsp. a. Rallus heldingi Sharpe, Cat. Birds Brit. Mus., 

 xxiii, 1894, 10. 



Rallus elegans heldingi Peters, Check-list Birds of World, ii, 1934, 159. 



Rallus obsoletus heldingi van Rossem, Condor, xxxi, 1929, 214 (crit. ; range). — 

 American Ornithologists' Union, Check-list North Amer. Birds, ed. 4, 

 1931, 95. 



Rallus longirostris heldingi Oberholseb, Proc. U. S. Nat. Mus., Ixxxiv, 1937, 

 338 (monogr.; crit.). 



RALLUS LONGIROSTRIS RHIZOPHORAE Dickey 



SoNORA Clapper Rail 



Adult (sexes alike). — Very similar to Rallus longirostris yumumen- 

 sis but less brownish above — the top of head duskier — mummy brown 

 to fuscous, the dark centers of the feathers of the upper parts of the 

 body blacker — fuscous-black, and the edges of these feathers more 

 grayish — smoke gray to light grayish drab ; sides of neck much more 

 washed with grayish. 



Other plumages unknown. 



Adult male.— Wing 147-155.5 (151.8) ; tail 60.5-65 (63.3) ; exposed 

 culmen 56-60.5 (59) ; tarsus 54.5-58.5 (56.4) ; middle toe without claw 

 45.5-51.5 (48.3mm.).«" 



Adult female.— W'mg 139.5-148 (142.6) ; tail 58-65 (61.6) ; exposed 

 culmen 53-57.5 (55.2) ; tarsus 49-56 (50.9) ; middle toe without claw 

 42-47 (43.8 mm.).^^ 



Range. — Coastal marshes of Sonora from Guaymas south to the 

 Sonora — Sinaloa boundary (Guaymas; Tobari Bay; Vie jo Yaqui 

 Lagoon). 



" Five specimens from Sonora, Mexico, including the type. 

 "Nine specimens from Sonora, Mexico. 



