No method is more calculated to demonstrate the existence of that symbolical representation which reigns throughout nature, than that of bringing before the eye of the student a series of forms belonging to different families, but which are _disguised_, under an outward appearance of general similitude; How few, even among professed entomologists, would suspect that the present butterfly, and _Leptocircus Curius_, pl. 106, were of totally different families: looking to their general aspect, as size, form, and colour, we should even be tempted to place them in the same genus; On closer examination, however, we find that one is a genuine _Papilio_, and the other an _Erycina_; That this fact may be placed beyond all doubt, we have given magnified details of both insects, which, from their great rarity, will be highly acceptable to the Entomologist. The specimen here figured is the only one we met with in Brazil, nor have we seen the species in any other collection; Excepting the black bands and the crimson spots, all the wings are transparent; the under surface being similar to the upper. We possess the mutilated remains of a second species; but we know not to what natural genus they belong. Fig. 1. _Zeonia_, wing. 2. _Leptocircus_, wing. 3. _Zeonia_; anterior foot, with the claw more enlarged; 4. head and palpi in profile; 5. Antennæ. * * * * * * [Illustration: LEPTOLOPHUS _auricomis_. _Golden-eared Parrakeet._] LEPTOLOPHUS auricomis, _Golden-eared Parrakeet._ ---- Sub-family Psittacinæ. Genus Platycercus. Sub-genus Leptolophus. (The Rasorial type.) SUB-GENERIC CHARACTER. Bill distinctly toothed, culmen slightly carinated; nostrils thick, tumid, naked; head crested; wings very long, outer web of the quills not sinuated; tail very broad, cuneated, the two middle tail feathers conspicuously longest and pointed. ---- SPECIFIC CHARACTER. _Cinereous, wings with a longitudinal white stripe; ears orange; lateral tail feathers banded with yellow and black._ Palæornis Novæ-Hollandiæ. New Holland Parrakeet. _Lears Parrots, No 8._ ----