"The nests vary interminably in size and shape, but are pretty constant in the material used; this being almost always irregular and thorny twigs of various trees growing in the neighbourhood, while the interior is formed of less thorny twigs and with some wool and hair. Usually, also, if the material be at hand, a quantity of old dry horse-droppings is placed loosely on the top of the nest, and gradually becomes felted into it, rendering it more nearly waterproof. In place of this I have frequently found quantities of broken straw, weed-stalks, grass, and even chips; all doubtless collected from the ridges of drift which the last overflow of the river had left near at hand. So compactly is the whole nest built, that it often lasts more than one year, and may sometimes serve the same pair two successive summers. More often, however, a new nest is built directly above the old one, which serves as a foundation, and occasionally as many as three nests are seen thus on the same branch-tip, two of them at least being occupied. When other branches of the same tree are similarly loaded, and other trees close at hand also bear the same kind of fruit, the result is very picturesque. The eggs, which are white, are laid from October 1 to January 1, but many of the birds work at nest-building all the winter, sometimes spending months on a single nest." 210. PHACELLODOMUS STRIATICOLLIS (d'Orb. et Lafr.). (RED-WINGED THORN-BIRD.) +Anumbius striaticollis+, _d'Orb. Voy., Ois._ p. 255 (Buenos Ayres). +Phacellodomus striaticollis+, _Scl. et Salv. Nomencl._ p. 65. _Description._--Above, forehead and crown rufous; lores white; sides of head, neck, and back brown; whole wing chestnut, the feathers tipped with blackish; tail chestnut; beneath white, clearer on the throat and breast, which are marked with slight white shaft-spots; sides of breast and flanks washed with reddish brown; under tail-coverts brown; under wing-coverts cinnamon; bill and feet horn-colour: whole length 8·0 inches, wing 2·9, tail 3·1. _Female_ similar. _Hab._ Argentina and Uruguay. D'Orbigny, who discovered this species in Uruguay, and found it also near Buenos Ayres, remarks that it lives in pairs in the thorny bushes, and resembles its congeners in habits. It is, however, certainly not common in the vicinity of the Argentine capital, for Hudson has never met with it. 211. PHACELLODOMUS RUBER (Vieill.). (RED THORN-BIRD.) +Phacellodomus ruber+, _Burm. La-Plata Reise_, ii. p. 467 (Paraná, Cordova); _Scl. et Salv. Nomencl._ p. 65; _Durnford, Ibis_, 1877, p. 183 (Buenos Ayres); _Barrows, Bull. Nutt. Orn. Cl._ viii. p. 210 (Entrerios). +Phacellodomus maculipectus+, _Cab. J. f. O._ 1883, p. 109 (?).