GENERIC CHARACTER. Antennæ thicker towards the tip, and generally terminating in a knob: wings erect when at rest. Fly by day. * EQUITES TROJANI. SPECIFIC CHARACTER AND SYNONYMS. Wings indented, caudated, or ending in a tail; brown, above and beneath the same colour; anterior wings with a yellow band, posterior wings with red, blue and yellow lunules. PAPILIO ACAMAS: alis dentato caudatis concoloribus fuscis: anticis fascia flava, posticis lunulis rubris cæruleis flavisque.—_Fabr. Ent. Syst. T. 3. p. 1. 8. 22._—_Jon. fig. pict. 1. tab. 72._ * * * * * Papilio Acamas is one among the number of those Papiliones, which, from their magnitude, as well as beauty, constitute the more attractive species of the first family of this interesting tribe, the _Equites Trojani_ of the Fabrician system. Papilio Acamas is scarcely surpassed in size by any other of the Papilio genus, and when it is added, as it may be with confidence, that the figure now presented to the reader is the first that has appeared in elucidation of such a noble species, we cannot doubt that its introduction will be received with pleasure by every Naturalist in this country and throughout Europe. This fine and very striking species has been long since known by repute to Entomologists; but from the description only which Fabricius had left us in his _Entomologia Systematica_. Those conversant with this work of our author, will be aware, that Papilio Acamas constitutes one of those many species for which Fabricius refers only to the drawings of the late Mr. Jones: the present figure is a faithful copy of that original drawing referred to and described by Fabricius, and as such cannot fail to prove acceptable to every Entomologist. It is certainly the only figure extant by means of which the Fabrician species P. Acamas can be ascertained.