208 ANATIDZ. 
The Mallard is found throughout the northern regions of both hemispheres, and in 
the winter season visits more southern latitudes. 
It is found more often on inland waters than on the sea-coast, its food consisting 
largely of grass-seeds, rice, roots of plants, &c., as well as worms, small shell-fish, 
and insects. The nest is made of grasses, and generally placed on the ground not far 
from water, though occasionally the bird will build in a tree. The eggs are from six 
to eight in number, of a greenish-white colour. 
2. Anas diazi. 
Anas diazi, Ridgw. Auk, 1886, p. 382°; Ferrari-Perez, Pr. U. S. Nat. Mus. ix. p. 1717; Salvad. 
Cat. Birds Brit. Mus. xxvii. p. 204°. 
Supra brunnescenti-nigra, plumis singulis saturate fulvo marginatis; pileo plumis nigricantibus, arenario 
anguste marginatis ; fascia fusca oculum transeunte; genis cum capitis lateribus colloque arenariis, nigro 
anguste striolatis ; loris, mento et gutture albicanti-fulvis concoloribus ; corpore subtus reliquo brunnes- 
centi nigro, plumis singulis nigricantibus late fulvo marginatis; tectricibus alarum minoribus dorso 
concoloribus, majoribus brunneis, fascia duplici alba nigraque terminatis; primariis brunnescenti-nigris, 
externe pallidioribus ; secundariis externe speculo saturate cyanescenti-viridi ornatis, fascia subterminali 
nigra, altera apicali alba; axillaribus et subalaribus albis: rostro olivascenti-flavo, culmine saturatiore, 
ungue nigricante, mandibule basi haud nigro maculata; pedibus saturate aurantiacis; iride saturate 
brunnea. Long. tota circa 19°5, ale 10-0, caude 4:0, culm. 2:05, tarsi 1-6. (Deser. maris adulti ex 
Puebla. Mus. nostr.) 
¢ femine similis, sed paullo major. 
Hab. Mexico, Laguna del Rosario, Tlaxcala and San Ysidro, Puebla (Ferrari- 
Perez s**), 
We possess an adult female of this Mexican Duck, obtained by Ferrari-Perez in 
Puebla, where he also procured the type specimens. 
This species is said by Mr. Ridgway to be most like A. fulvigula from Florida, but 
the last row. of wing-coverts has a distinct subterminal band of white, and the 
secondaries a broad terminal bar of the same. The general colour is also much less 
fulvous, and the cheeks are streaked with dusky; there is no black spot on the lower 
basal angle of the upper mandible. 
3. Anas aberti. 
Anas obscura, Dugés (nec Gm.), La Nat. 1. p. 143°; Lawr. Mem. Bost. Soc. Nat. Hist. ii. 
p- 3147; Scl. & Salv. P. Z.S. 1876, p. 880° (part.) ; Herrera, La ‘Nat. (2) i. pp. 187, 328 
(1888) *. 
Anas aberti, Ridgw. Pr. U.S. Nat. Mus. i. p. 250°; ix. p. 173°; Salvad. Cat. Birds Brit. Mus. 
XXvil. p. 2047. 
A, diazi similis, sed multo minor, et secundariis fascia alba (0°35) distincta terminatis, sed tectricibus 
secundariorum minime albo fasciatis; tectricibus minoribus brunnescenti-schistaceis, sordide brunneo 
marginatis, tectricibus medianis extus velutino-nigris, fasciam distinctam formantibus: rostro flavescenti- 
brunneo, culmine saturatiore, ungue fuscescente; pedibus flavis. Long. tota circa 16-0, ale 8:5, 
eaude 3°25, culm. 1°65, tarsi 1:3. (Descr. ex scriptis R. Ridgway.) 
