BIRDS OF NORTH AND MIDDLE AMERICA. 73 



Morococcyx erythropygia Sclatee, Cat. Am. Birds, 1862, 322 (Central America). — 

 Lawrence, Ann. Lye. N. Y., ix, 1868, 128 (Pacaca, Costa Eica). — Feant- 

 zius, Journ. fiir Orn., 1869, 361 (Costa Eica).— Nutting, Proc. TJ. S. Nat. 

 Mus., v, 1884, 388 (Sucuya, Nicaragua). — Zeled<5n, Anal. Mus. Nac. Costa 

 Eica, i, 1887, 123 (Liberia, Costa Eica). — Underwood, Ibis, 1896, 44 

 (Bebedero to Volcan de Miravalles, Costa Eica). 



[Morococcyx] erythropygia Sclatee and Salvin, Nom. Av. Neotr., 1873, 108, part. 



M[orococcyx] erythropygus Cabanis and Heine, Mus. Hein., iv, Heft 1, 1862, 81 

 (Ysabal, Guatemala). 



Morococcyx erythropygus Boucard, Proc. Zool. Soc. Lond., 1878, 48 (Atenas, 

 Costa Eica; habits). — Shelley, Cat. Birds Brit. Mus., xix, 1891, 422, part 

 (Lagunaand Eio Montagua, Guatemala; Costa Eica). — Salvin and Godman, 

 Biol. Centr.-Am., Aves, ii, 1896, 538, part (Laguna, Valley of Eio Managua- 

 and Volcan de Fuego, Guatemala; Chmandega, and Sucuya, Nicaragua; 

 "Pacuare," i. e. Pacaca, Liberia, and Atenas, Costa Eica). — Dearboen, 

 Pub. 125, Field Mus. N. H., 1907, 87 (Gualan, Guatemala; habits).— Car- 

 biker, Ann. Carnegie Mus., vi, 1910, 566 (San Jose, Miravalles, Tenorio, 

 Esparta, and Cerro Santa Maria, Costa Eica). 



[Morococcyx] erythropyus Shaepe, Hand-list, ii, 1900, 174, part. 



M[orococcyx] e[ryihropygus] erythropygus Eidgway, Proc. Biol. Soc. Wash., xxviii 

 May 27, 1915, 105, in text. 



Oeococcyx erythropygius Schlegel, Mus. Pays-Bas, i, no. 25 (Cuculi), 1864, 42 

 (San Carlos). 



MOROCOCCYX ERYTHROPYGUS MEXICANUS Ridgway. 



MEXICAM RUFOUS-RUMPED CUCKOO. 



Similar to M. e. erythropygus but larger and paler, the upper parts 

 averaging more grayish olive, the under parts varying from cinnamon- 

 ochraceous to dull light ochraceous-buff or even pale buff; under 

 surface of tail, however, darker, showing, on lateral rectrices, less 

 contrast between the grayish brown of proximal and blackish of sub- 

 terminal portions. 



Adult male.— Length (skins), 256-280 (267); wing, 92-108 (100.5); 

 tail, 124-142.5 (133.1); exposed culmen, 23-26 (24.5); tarsus, 31-38 

 (35.2); outer anterior toe, 21-24 (22.7) . b 



Adult female.— Length (skins), 238-275 (256); wing, 95-107.5 

 (99); tail, 120-136 (128.6); exposed culmen, 22.5-25 (23.6); tarsus, 

 33-35.5 (34.5); outer anterior toe, 20.5-23 (21.4). c 



Southwestern and western Mexico, in States of Chiapas (Tonala), 

 Oaxaca (Santa Efigenia; Tehuantepec City; Juchitan; Chihuitan; 

 Chimalapa; Sierra de Santo Domingo), Guerrero (Acapulco; Dos 

 Arroyos; Cayacal), Colima (Plains of Cohma; Manzanillo), Sinaloa 

 (Mazatlan; Escuinapa), and Territory of Tepic (San Bias). 



a The darkest examples of the Mexican form are about as dark as the palest ones of 

 the Central American one, or true M- erythropygus. There is much individual varia- 

 tion in the depth of color of the under parte in both forms, however. 



B Eleven specimens. 



c Eight specimens. 



