78 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



Range. — Known only from the fresh-water swamps along the Col- 

 orado River above Yuma and the adjacent irrigation canals in the 

 vicinity of Laguna Dam, and to the lower Salton Sea. 



Ty])e locality. — Bard, Imperial County, Calif. 



Rallus yumanensis Dickey, Auk, xl, 1923, 90 (orig. descr. ; Bard, Imperial 

 County, Calif.)— Dawson, Birds California (students' ed.), iii, 1923, 1536 

 (genl,). — Oberholseb, Auk, xli, 1924, 592 (add to North Amer. Check- 

 list). — Geinnell, Condor, xxvii, 1925, 76 (add to California list). — Bent, 

 U. S. Nat. Mus. Bull. 135, 1927, 275 (mouogr.).— Gkinnell, Univ. California 

 Publ. Zool., xxxviii, 1932, 271 (type loc, crit). 



Rallus olsoletus yumanensis van Rossem, Condor, xxxi, 1929, 215 (crit. ; 

 distr.). — American Oknithologists' Union, Check-list North Amer, Birds, 

 ed. 4, 1931, 96.— MoFFiTT, Condor, xxxiv, 1932, 137 (marshes of Salton Sea, 

 Calif.).— Abbott, Condor, xlii, 1940, 264 (breeding; Salton Sea). 



Ralhis elegans yumanensis Peters, Check-list Birds of World, ii, 1934, 159. 



Rallus Jongirostrls yumanensis Obekholser, Proc. U. S. Nat. Mus., Ixxxiv, 1937, 

 341 (crit; monogr.). 



RALLUS LONGIROSTRIS BELDINGI Ridgway 



Beldinq's Clappee Rail 



Adult (sexes alike). — Similar to Rallus longirostris levipes but 

 darker, the top of the head and the centers of the feathers of the 

 upper-parts of the body deep fuscous to fuscous-black, the margins 

 of the latter feathers browner — buffy brown to ashy snuff brown; 

 lower throat, sides of neck, breast, and upper abdomen darker and 

 more richly colored — fawn color with a cinnamomeous wash; flanks 

 darker, the interspaces between the white bars clove brown, frequently 

 darkening to black next to the white bars. 



Juvenal. — Apparently unrecorded. 



Natal down. — Not recorded. 



Adult 7nale.—Wmg 147-160 (155.1) ; tail 55-73 (64.8) ; exposed 

 culmen 53-63 (56.2) ; tarsus 48-57 (53.1) ; middle toe without claw 

 43-50 (47.8 mm.).«° 



Adult female.— Wing 140-150 (144.8) ; tail 54-68 (63.2) ; exposed 

 culmen 49-55.5 (52.7) ; tarsus 45-53 (49.2) ; middle toe without claw 

 40^7 (43.9 mm.).«i 



Range. — Resident in the mangrove swamps of Lower California 

 from the Cape district north on the Pacific side to latitude 28 °N., in- 

 cluding many near shore islands, and on the Gulf of California side 

 to San Jose Island (Espiritu Santo Island; La Paz; San Jose Island; 

 Santa Margarita and Magdalena Islands; Magdalena Bay; San Ig- 

 nacio Lagoon ; Pond Lagoon ; Scammons Lagoon, San Jorge) . 



Type locality. — Espiritu Santo Island, Lower California. 



*" Fourteen specimens. 

 *^ Twelve specimens. 



