This Pigeon has a general resemblance to the Picazuro, but may be at once distinguished by its spotted back and wings. It ranges from South Peru through Bolivia and Western Argentina into Patagonia, where it appears to be a resident. In winter, the valley of the Rio Negro is visited by it in immense flocks, which are a great plague to the farmers, as they descend in clouds on the fields, and devour the wheat before it has time to sprout. While watching crowds of these birds feeding on the ground, I noticed that their manner was in striking contrast to that of the _C. picazuro_, which has slow and dignified motions; for it hurried about, and snatched up its food with such rapidity that the most animated motions of other birds that feed in flocks on the ground seemed languid by comparison. This excessively lively habit is, no doubt, directly caused by the conditions of life; the sterile soil and scanty vegetation of the region it inhabits require in a species going in large bodies, and subsisting exclusively on fallen seed, a greater activity than is necessary in the rich fertile region further north. Its song is composed of notes equal in length and number to that of the Picazuro, but its voice is exceedingly hoarse, like that of the European Wood-Pigeon. The great body of these birds retire, on the approach of summer, from the Rio Negro valley, a few only remaining to breed. Their nesting-habits and eggs are like those of the Picazuro. 359. ZENAIDA MACULATA (Vieill.). (SPOTTED DOVE.) +Zenaida maculata+, _Burm. La-Plata Reise_, ii. p. 497; _Scl. et Salv. Nomencl._ p. 132; _iid. P. Z. S._ 1868, p. 143 (Buenos Ayres); _Durnford, Ibis_, 1877, p. 193 (Buenos Ayres); _Gibson, Ibis_, 1880, p. 8 (Buenos Ayres); _White, P. Z. S._ 1882, p. 626 (Catamarca); _Barrows, Auk_, 1884, p. 275 (Entrerios). _Description._--Above pale brown; nape plumbeous; outer wing-coverts and scapularies with a few black spots; wings dark grey, with fine white margins; tail plumbeous, broadly ended with white, and crossed by a subapical black band; middle rectrices like the back: beneath pale vinaceous, brighter on the breast, and whiter on the throat; bill black; feet yellow: whole length 9·0 inches, wing 5·5, tail 3·5. _Female_ similar. _Hab._ South America, from the Amazons to Chili and Buenos Ayres.