166 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



Porzana cinereiceps Lawrence, Ann. Lye. Nat. Hist. New York, xi, 1875, 90 (Tala- 

 manca, e. Costa Rica ; coll. U. S. Nat. Mus.)— Ridgway, Proc. U. S. Nat. Mus., 

 i, 1S7S, 252, in test (Costa Rica) ; vi, 18S4, 409, footnote (diagnosis).— 

 Zeledon, Proc. U. S. Nat. Mus., viii, 1885, 114 (Costa Rica). 



Creciscns cinereiceps Sh.vkpe, Cat. Birds Brit. Mus., xxiii, 1894, 141, footnote, 

 337 (Rio Escondido, Nicaragua). — Salvin and Godman, Biol. Centr.-Amer., 

 Aves, iii, 1903, 325, part (Greytown, Bluefields, Rio Escondido, and Los 

 Sixbalos, e. Nicaragua; Talamanca, Pacuarito, Desamparados, Jimenez, 

 Reveutazou, Pacuare, Sipurio, Juan Vinas. Azahar de Cartago, Carillo, and 

 Rio Frio, Costa Rica). — Caurikeb, Ann. Carnegie Mus., vi, 1910, 410 (Juan 

 Viiias, Reventazon, Carillo, Cariblanco de SerapiquI, Cache, Gutlpiles, and 

 Bonilla, Costa Rica; habits).— Cooke, U. S. Dept. Agr. Bull. 128, 1914, 36 

 (range). — Petees, Bull. Mus. Comp. Zool., Ixxi, 1931, 301 (Almirante and 

 vicinity; Changuinola, Guabo, Panama). 



Linmocrex cinereiceps Ridgway, Smiths. Misc. Coll., Ixxii, No. 4, 1920, 4. 



Porzana leucogastra Ridgway, Proc. U. S. Nat. Mus., vi, 1884, 408 (Los Sabolos, e. 

 Nicaragua; U. S. Nat. Mus.). 



P[orsana\ leucogastra Ridgway, Proc. U. S. Nat. Mus., x, 1888, 111 (diagnosis; 

 range). 



Creciscus leucogaster Shaepe, Cat. Birds Brit. Mus., xxiii, 1894, 140 footnote. 



[Creciscus] leucogaster Shaepe, Hand-list, i, 1899, 105. 



Laterallus albigularis cinereiceps Peters, Check-list Birds of World, ii, 1934, 190. — 

 Griscom, Bull. Mus. Comp. Zool., Ixxviii, 1935, 304, (Panama, Caribbean 

 Slope east of Rio Calovevora ; Nicaragua to w. Panama). 



LATERALLUS ALBIGULARIS ALBIGULARIS (Lawrence) 



Panamanian White-theoated Rail 



Adult (sexes alike), dark phase. — Similar to the corresponding 

 phase of Laterallus albigularis cinereiceps, but with the forehead, 

 crown, and occiput bright sepia to bright Front's brown ; the upper- 

 parts of the body more brownish, warm sepia to Front's brown in- 

 stead of bister; lores, cheeks, and auriculars Mikado brown to deep 

 russet and hazel; chin purer white; size averaging slightly larger. 



Adult (sexes alike), pale phase. — Similar to the pale phase of Lat- 

 erallus albigularis cinereiceps .^ but with the same differences on the 

 head and upper parts as in the dark phase. 



Juvenal (sexes alike). — Similar to the corresponding stage in cine- 

 reiceps but more rufescent above; the upperparts of the body Brus- 

 sel's brown to raw umber instead of clove brown, the top of the head 

 sepia instead of bister ; the sides of head and neck, and the breast and 

 abdomen lightly tinged with pinkish cinnamon. 



Natal doion. — Not recorded. 



Adult rmde.—Wmg, 73-80.5 (76.8) ; tail 25.5-34 (29.1) ; exposed 

 culmen 16-19 (18.1); tarsus 27-32 (29.7); middle toe without claw 

 29-36 (32.3mm.).«4 



*" Sixteen specimens from Panama and Colombia. 



