ATTILA. 135 
5. Attila cinnamomeus. 
Aitila cinnamomeus, Lawr. Ann. Lye. N. Y. x. p. 8°; Mem. Bost. Soc. N. H. ii. p. 285°. 
A. citreopygio similis, sed supra multo pallidior et magis cinnamomeus; cauda pallide cinnamomea, uropygio 
quoque pallidiore. (Descr. maris ex Santiago Tepic, Mexico. Mus. nostr.) 
Hab. Mexico, Santiago Terr. de Tepic (W. B. Richardson), Beltran, Hacienda de San 
Marcos and Tonila in Jalisco, Santiago in Colima (Lloyd), Omilteme, Amula, and 
Rincon in Guerrero (Mrs. H. H. Smith), Juchatengo and Sola in Oaxaca (i. 
Trujillo). 
This is a western form of Attila, extending from the territory of Tepic to Oaxaca. 
Generally speaking it is of a more cinnamon tint on the upper surface, and the tail is 
of a brighter cinnamon than in any of the allied forms. The under surface as far as 
the abdomen is usually pale grey with dark streaks, and few specimens have any tinge 
of yellow. 
6. Attila hypoxanthus. 
Preecedentibus similis, sed subtus undique sulphureo suffusus ; uropygio sicut in A. cozumele et A. citreopyyio ; 
cauda fere ut in A. cinnamomeo. (Descr. exempl. ex Vera Paz, Guatemala. Mus. nostr.) 
Hab. Mexico, Venta de Pelegrino in Guerrero (Mrs. H. H. Smith); Guaremaua, Vera 
Paz (0. S. & F. D. G.). 
The two birds we here separate appear to differ so much from the other forms that 
we are strongly inclined to consider them distinct. None of the others have the yellow 
of the underparts spread over the whole surface, all of them having more or less white 
on the abdomen, and grey tints usually prevail over the throat and breast. Though 
we separate these birds under a distinct name, we confess that the distribution of this 
and the allied forms is difficult to understand: that two forms should coexist in the 
same area is not what we should expect. If, on the other hand, these two birds are 
only extreme forms of the prevalent local race of the area in which they were found, 
one of them would belong to A. cinnamomeus and the other to A. citreopygius, the 
two individuals being practically inseparable. 
The whole question of the separation of the various forms of Attila is, as we have 
already said, so complicated that no certain decision can at present be arrived at. In 
separating A. hypoxanthus the problem seems to be a little clearer, but we should not 
be surprised if the whole group had to be entirely recast. 
Subfam. COTINGIN ZL. 
This subfamily contains some of the most highly coloured birds of the family 
Cotingide, the members of the genus Cotinga being amongst the most beautiful of 
South-American birds. 
The development of the rictal bristles has been used as a character by which to 
