394 . CAPRIMULGID-E. 
Caprimulgus guianensis, Gm. Syst. Nat. i. p. 1030”. 
Nyctidromus guianensis, Cassin, Pr. Ac. Phil. 1860, p. 133°; Lawr. Ann. Lye. N. Y. vii. p. 290”; 
Scl. P. Z.S. 1864, p. 176%; Scl. & Salv. P.Z.S. 1864, p. 864%; Salv. P. Z. S. 1870, 
p. 204°. 
Nyctidromus albicollis merrilli, Sennett, Auk, 1888, p. 44°. 
Nyctidromus merrilli, Hartert, Cat. Birds Brit. Mus. xvi. p. 591”. 
Supra brunneus griseo et rufo minute irroratus, plumis verticis medialiter nigris striam medianam formantibus, 
plumis verticis lateralibus et dorsi stria angusta nigra notatis ; scapularibus fascia lata subterminali nigra 
cervino limbata, tectricibus alarum cervino vermiculatis et macula subrotunda terminali ornatis: subtus 
cervinus, mento ef; gule lateribus nigro fasciatis, gutture plaga magna mediana nivea supra eam plaga 
nigra; pectore crebre, abdomine sparsim fasciis nigris notatis ; alis nigris, primariis quinque externis fascia 
obliqua nivea notatis, primariis internis et secundariis fulvo fasciatis; cauda nigra, rectricibus mediis 
griseo irroratis fasciis indistinctis exhibentibus, rectricibus secunda et tertia ab externo in pogonio interno 
plaga magna nivea ornatis. Long. tota circa 10°5, ale 6°5, caude 6, tarsi 1:0, dig. med. cum ungue 1°1. 
Descr. maris ex Chimalapa, Tehuantepec. Mus. nostr.) 
mari similis, sed caude rectrice subexterno in pogonio interno ad apicem tantum albo. 
Hab. Nortn America, S.E. Texas 18 7 38 —Mexico, Tampico (W. B. Richardson *5), 
Valley of Mexico (Herrera ?*), Misantla (Ff. D. G. °°), Jalapa (de Oca *8, Ferrari- 
Perez), Coatepec, Huatusco, Rio Rancho Nuevo, Santa Ana (fF. Ferrari-Perez), 
Orizaba (Bottert), Cordova (Sallé 27), Playa Vicente (M/. Trujillo), Tres Marias Is. 
(Grayson ®), Presidio de Mazatlan (Forrer), Mazatlan, Plains of Colima (Xantus §), 
Tepic, San Blas, Colima, Santiago (W. B. Richardson), Mazatiopam in Puebla 
(Lf. Ferrari-Perez*°), Chihuitan, Santa Efigenia (Sumichrast®), ‘Tehuantepec, 
Tonala, Salina Cruz, Chimalapa (W. B. Richardson), Acapulco, Teapa (Mrs. 
H. H. Smith), Northern Yucatan 15, Peto, Buctzotz, Temax (G. F. Gaumer), 
Tunkas, Shkolak and Ticul (W. Stone®®), Merida (Schott7), Mugeres and 
Cozumel Islands (G. F. Gaumer 24); British Honpuras (Dyson), Orange Walk 
(G. F. Gaumer), Belize (Blancaneauxr) ; GuUATEMALA2, Pine-ridge of Poctum, Chisec, 
Choctum, Coban, Cahabon, Teleman, San Gerénimo, Duefias, Retalhuleu (0. 8. 
& FP. D. G.); Horpuras, San Pedro (G. M. Whitely !), Segovia River (Zownsend 2") ; 
SaLvaDor, La Libertad, Volcan de San Miguel (W. B. Richardson); Nicaraaua, 
Chinandega, Momotombo (W. B. R.), Sucuyé 8, Omotepe , San Juan del Sur” 
(Nutting); Costa Rica, San José, Angostura (J. Carmiol®, Cherrie), Ivazu (Boucard ™, 
Rogers), La Palma (Nutting), Orosi, Turrialba, Moravia, Pacuar, Chirripo 
(v. Frantzius), Las Trojas, Pozo Azul de Pirris, Alajuela, Naranjo de Cartago 
(Zeledon **); Panama, Chiriqui, Bugaba, Mina de Chorcha, Chitra, Calovevora 
(Arcé °°), Line of Railway (McLeannan *° 33 35), Turbo (Wood 32) —Sovrn AMERICA 
generally, from Colombia and Guiana *! to South Brazil 2°, 
The extent of individual variation shown in this species is considerable, and it exists 
to a very great extent without reference to locality, sex, or age. The general cast of 
the upper plumage is sometimes grey, sometimes rich rufous, and there is every inter- 
mediate gradation of tone between these colours. ‘Chere is also great difference in 
