BIRDS OF NORTH AND MIDDLE AMERICA 109 



A[mauroUmnas] cloncolor] concolor Bond, Birds West Indies, 1936, 90 in text 

 (Jamaica; possibly extinct). 



AMAUROUMNAS CONCOLOR GUATBMALENSI3 (Lawrence) 



GtTATEMALAN TJnIFOBM CKAKE 



Adult (sexes alike). — Similar to that of the nominate race but 

 more olive above, generally olivaceous raw umber, darker on the 

 average below, the lower throat, breast, and abdomen deep rich hazel 

 to bright russet, and averaging smaller in size. 



Jwvenal (sexes alike). — Darker, less rufescent than adult; top of 

 head and the interscapulars, back, rump, upper tail coverts dark 

 mummy brown, becoming almost fuscous on the lower back; wings 

 and tail as in adults, the upper wing coverts slightly darker than 

 in adults — cinnamon-brown ; loral superciliary stripe ashy -pale 

 ochraceous-buff ; sides of head dusky, grayish wood brown ; chin and 

 upper throat like the superciliaries ; pectoral area, sides, flanks, 

 thighs, imder tail and under wing coverts grayish sepia, paling in 

 the midabdomen to dark hair brown washed with sepia ; iris yellow. 



Natal down. — ^Unknown. 



Admit male.—Wmg 116-125 (119.4) ; tail 44-52 (47.8) ; exposed 

 culmen 23.5-26.5 (25.6) ; tarsus 38.5-44.5 (41) ; middle toe without 

 claw 27-30.5 (28.7 mm.).* 



Adult female.— Wing 110-122 (115.5) ; tail 44.5-47 (45.7) ; exposed 

 culmen 23-26 (24.7) ; tarsus 37-43.5 (40.9) ; middle toe without claw 

 28-29.5 (28.5 mm.).= 



Range. — Inhabits fresh- water swamps from British Honduras (Sittee 

 Eiver) ; Honduras (Omoa) ; Guatemala; Nicaragua (Chontales; Pena 

 Blanca) ; Costa Kica (Peralta, El Sance, Alajuela, San Carlos) ; and 

 Panama (Chiriqui, Chitra, Almirante, Fruitdale), south through 

 Colombia (Barbacoas; "Bogota"), and British Guiana (Merume Moun- 

 tains; Supenaam River; Arawari River) to Ecuador (San Javier; Rio 

 Bobona; Raya-Yaco; Sara-Yaco) and western Peru (near Lima) and 

 to northern and southcentral (?) Brazil (Santarem; Sao Paulo de 

 Olivencia, Rio Solimoes ; Rio Tapajos, Boim ; Matto Grosso — Engenho 

 do Cap Gama, and Rio Guapore and to (?) Bolivia." 



Type locality. — Guatemala. 



Porzana concolor Sclateb and Salvin, Proc. Zool. Soc. London, 1868, 452, part 

 (Honduras; Guatemala). — Pelzb2,n, Orn. Bras., 1870, 316, part. — Laweencb, 

 Ibis, 1871, 370 (crit. as to Oorethrura guatemalensis Lawrence.) — Sclatesb, 



* Ten specimens from British Honduras, Costa Rica, Ecuador, Britisli Guiana, 

 and the Amazon Valley of Brazil. 



' Six specimens from Nicaragua, Panama, Ecuador, and Brazil. 



•J have seen no Matto Grosso or Bolivian specimens and therefore cannot be 

 certain as to their subspecific allocation; Amazonian birds are guatemalensis; 

 those from eastern and southeastern Brazil (Bahia to Sao Paulo) are the larger 

 race casianeus. 



