_Description._--Above cinnamon-red, with irregular black cross bands on the back; head bluish grey; front and sides of head white; nape and stripes on the sides of the neck black; wings bluish grey with black central spots; remiges black, with numerous white cross bars on the inner webs; tail cinnamon-red, with a broad subterminal black band and white tip: beneath white, with buffy tinge and irregular oval black spots: whole length 10·5 inches, wing 7·7, tail 5·0. _Female_ similar, but rather larger; upper surface regularly barred across; beneath buffy white with brown shaft-stripes; tail with numerous cross bars. _Hab._ South America. The habits of this little Falcon closely resemble those of _Falco fusco-cærulescens_, and like that bird it is common in Patagonia and migrates north in winter. Many individuals, however, do not migrate, as I found when residing at the Rio Negro, where some pairs remained at the breeding-place all the year. Many pairs are also found resident and breeding in other parts of the Argentine country, but it is common only in Patagonia. It nests in holes in cliffs and also on trees, and sometimes builds its own nest on the large nest of a Dendrocolaptine bird or of a Parroquet. It lays four eggs, large for the size of the bird, oval in shape, and white in colour, thickly blotched with dull red. The preying habits of the Little Kestrel are similar to those of the Orange-chested Hobby; it haunts farm-houses and plantations, and spends a great deal of time perched on some elevation watching for its prey, and making sudden dashes to capture it by surprise. But though not bold when seeking its food, it frequently makes violent unprovoked attacks on species very much larger than itself, either from ill-temper or in a frolicsome spirit, which is more probable. Thus I have seen one drive up a flock of Glossy Ibises and pursue them some distance, striking and buffeting them with the greatest energy. I saw another pounce down from its perch, where it had been sitting for some time, on a female skunk quietly seated at the entrance of her burrow, with her three half-grown young frolicking around her. I was watching them with intense interest, for they were leaping over their parent's tail, and playing like kittens with it, when the Hawk dashed down, and after striking at them quickly three or four times, as they tumbled pell-mell into their kennel, flew quietly away, apparently well satisfied with its achievement. 306. ELANUS LEUCURUS (Vieill.). (WHITE-TAILED KITE.) +Elanus leucurus+, _Scl. et Salv. Nomencl._ p. 121; _iid. P. Z. S._ 1869, p. 160 (Buenos Ayres); _Durnford, Ibis_, 1877, p. 188 (Buenos Ayres); _White, P. Z. S._ 1882, p. 623 (Buenos Ayres); _Barrows, Auk_, 1884, p. 111 (Entrerios); _Döring, Exp. al Rio Negro_, p. 50 (Pampas); _Sharpe, Cat. B._ i. p. 339; _Withington, Ibis_, 1888, p. 470 (Lomas de Zamora).