Unfortunately, it was impossible to observe those that were still at liberty, as it would have been most interesting to learn if the strangers could survive one of our winters. [Illustration: THE GROUND PARRAKEET (_Pezoporinus formosus_).] THE CORELLA. The CORELLA (_Nymphicus Novæ Hollandicæ_) is closely allied to the Cockatoos, although belonging to the group of True Parrots. These birds are fully a foot long, and nearly the same in their spread of wing. The plumage is very variegated in its markings; the fore part of the head, the tuft, and cheeks, are lemon colour; the ear-coverings bright orange; the back of the neck, the two middle tail-feathers, and the outer border of the wings, brownish grey; the back, shoulders, under side, and outer tail-feathers, greyish chocolate brown. The shoulders and sides are the darkest; the upper wing-covers are white; the eyes dark brown; the beak lead colour; the feet blueish grey. The female resembles the male, except that the face and the crest are dark olive green; the feathers near the throat are brownish grey, those of the under parts of the body and upper tail-cover yellow; the four middle feathers of the tail are grey, the rest yellow, and, with the exception of the outer web, edged delicately with brown. Gould, whom we have to thank for a full description of the Corella, found this beautiful bird in great numbers in the interior of Australia. On the coast it is rare in comparison with the thousands seen on the plains of the interior, and in eastern Australia it seems to be more numerous than in the western parts of that continent.