188 Bulletin American Museum of Natural History. [Vol. XXXVI, 



Four specimens from near the foot of Mt. Duida at the head of the Ori- 

 noco, have the crown of the same bright Kaiser-brown as in the La Morelia 

 specimens, and in one there is a noticeable lengthening of the feathers of the 

 occiput; but the upperparts and inner wing-quills are less heavily barred; 

 in the latter character these birds resemble the Antioquia and Santa Marta 

 specimens, and show an obvious approach toward three Guiana specimens 

 of true major (Gmel.) (= svhscristatus Cab.) which have the upperparts 

 with fewer bars than in any other of our specimens. 



One of these Guiana specimens (Potaro River, Aug. 5) has the front half 

 of the crown sooty, the occiput chestnut with black markings. The occipital 

 crest is slightly developed. In another (no data) the forehead only is sooty, 

 the remainder of the crown and occiput being Kaiser-brown, as in ruficeps. 

 The occipital crest is somewhat more evident than in the preceding specimen. 

 In the third specimen the crest is intermediate in color between that of the 

 two just described, and the occipital plumes are about as long as in the 

 Guiana specimen without data. 



While, as above stated, a Santa Marta specimen has the crown of the same 

 color as in the La Morelia specimen of ruficeps, five examples from Puerto 

 Valdivia, on the lower Cauca in Antioquia, have the crown nearly as dark 

 as in Panama specimens of castaneiceps, but there is only the slightest indi- 

 cation of black markings. In one of these birds the ear-coverts are of about 

 the same color as the crown; in the others they are more dusky. I regard 

 these Puerto Valdivia birds as intermediate between ruficeps and castanei- 

 ceps; though if the former is typically represented by the Morelia bird, the 

 Antioquia as well as the Santa Marta specimens are paler and less heavily 

 barred above than either. In brief, the conclusions reached by the examina- 

 tion of our specimens may be summarized as follows: 



1. Tinamus major major (Gmel.). Type-locality, Cayenne. 



Char. — Upperparts and inner wing-quills comparatively unbarred; forehead and 

 sometimes crown, sooty; occipital crest small. 



Specimens examined. — Guiana: Potaro River, 2; Guiana, 1. 



2. Tirumvus major rujkeps Scl. & Salv. Type-locality, Rio Napo, Ecuador. 

 Ckar. — Crown wholly Kaiser-brown, ear-coverts the same; occipital crest not 



evident; upperparts and inner wing-quUls well barred. 



Specimens examined. — • Venezuela: near foot of Mt. Duida, 4; Colombia: La 

 Morelia,!; Santa Marta, 1; Puerto Valdivia, 5. 



3. Tinamus major castaneiceps Salvad. Type-locality, Chiriqui. 



Char. — Crown chestnut finely barred with black, becoming sooty toward the 

 western and northern, and developing an occipital crest toward the southern part of 

 its range. 



Specimens examined. — Panama: Canal Zone, 2; Tapahza, 2; Taearcuna, 2. 

 Colombia: R. Salaqui, 1; R. Atrato, 1; Andagueda, 1; Baudo, 1. 



4. Tinamus major latifrons Salvad. Type-locality, Balzar Mts., Ecuador. 



