The upper surface of the butterfly is of a dark brown colour of peculiar richness, crossed by stripes of deep scarlet. The insect with expanded wings displayed in a flying position in the lower part of the plate exemplifies this aspect of the upper surface. The lower surface is much more beautiful; the marks and colours on the anterior pair possess nearly the same character as those of the upper surface; the posterior pair are very different, being marked with large annular bands of bright yellow upon a fuscous ground, and inclosing a number of distinct spots of cœrulean blue, which in beauty emulate the brilliancy of the finest ultra marine: three of these blue spots are placed in the dark ground upon the disk, the remainder are disposed in a semi-circle upon a band of black towards the posterior extremity of the wings. This appearance is best perceived when the insect appears in a resting position as it is seen on one of the branches of the mimosa in the upper part of the plate. This insect is a native of Brazil. FIGURE II. PAPILIO PYRAMUS. PYRAMUS BUTTERFLY. ORDER LEPIDOPTERA. GENERIC CHARACTER. Antennæ thicker towards the tip, and generally terminating in a knob; wings erect when at rest. Fly by day. SPECIFIC CHARACTER AND SYNONYMS. Wings entire, fuscous glossed with blue, and marked with a fulvous spot; lower wings beneath grey. PLEBEJI RURALES, _Fabr. Sp. Ins._ HESPERIA RURALES, _Fabr. Ent. Syst._ PAPILIO PYRAMUS: alis integerrimis fuscis cœruleo micantibus, macula fulva, posticis subtus griseis. _Fabr. Spec. Ins. 2 p. 130. n. 590._—_Mant. Ins. 2 p. 83. n. 755._ HESPERIA PYRAMUS: _Fabr. Ent. Syst. t. 3. p. 1. 323. n. 223._ Alæ omnes fuscæ, cœruleo micantibus: macula magna, in medio fulva. Anticæ, subtus concolores, posticæ griseæ sive cinereo fuscoque variæ. _Fabr._ * * * * *