THECLA ORCAS. Plate XXXIV. fig. 2, 3. ORDER: Lepidoptera. SECTION: Diurna. FAMILY: Lycænidæ, _Steph._ GENUS. THECLA, _Fabr._ (Syst. Gloss.) Polyommatus, _Latr. God._ Hesperia p. _Fabr._ (olim.) Papilio (Pleb. rur.), _Drury_. THECLA ORCAS. Alis suprà virescenti-coeruleis, limbo maculisque nonnullis subcostalibus anticarum nigris; subtùs ferrugineo-fuscis maculis numerosis argenteis. (Expans. Alar. 1 unc. 6 lin.) SYN. Papilio (Pleb. Rur.) Orcas, _Drury_, _App. vol._ 3. _Enc. Méth._ ix. 645. 102. (Polyomm. O.) HABITAT: Sierra Leone. _Upper Side._ Antennæ brown and thickest at their extremities, where they are white. Head black, but between the eyes white. Thorax and abdomen dark blue, almost black. Wings golden blue, bordered and fringed with black; the anterior having along the anterior edges three small black marks, besides the border. Posterior wings furnished with four tails, and having two singular red spots placed at the abdominal corners. _Under Side._ Palpi and legs white. Sides, breast, and abdomen red and white. Wings fine red-brown, almost as deep as chocolate, adorned with a variety of different shaped silver spots; the anterior having eight, placed all over the wings, and the posterior eleven; the latter having an orange mark at the abdominal corners. Margins of the anterior wings entire, but of the posterior slightly dentated. PLATE XXXV. [Illustration] PAPILIO THYASTES. Plate XXXV. fig. 1. ORDER: Lepidoptera. SECTION: Diurna. FAMILY: Papilionidæ, _Leach_. GENUS. PAPILIO, _Auct._ Papilio (Eq. Ach.), _Drury, Fabr._ PAPILIO THYASTES. Alis caudatis nigris, fasciâ maculisque flavis, angulo ani sanguineo, posticis subtus lineâ sanguineâ. (Expans. Alar. 4 unc.) _Syn._ Papilio (Eq. Ach.) Thyastes, _Drury_, _App. vol._ 3. _Fabr. Ent. Syst._ III. 1. _p._ 26. _No._ 77. _Enc. Méth._ ix. _p._ 54. _Boisduv. Hist. Nat. Lepid._ 1. _p._ 349. 191. HABITAT: Brazil, "Rio Janeiro, Mr. Bonifas, 1776" (_Drury's_ MSS.). _Upper Side._ Antennæ black. Head, thorax, abdomen, and wings black-brown; the anterior wings having the middle occupied by a triangular yellow space, continued to the middle of the posterior ones; four yellow spots are placed at the tips, and several others along the anterior edges. Posterior wings furnished with two black tails, edged and tipped with yellow, and having four yellow marks {47}situated along the external edges; they have also three blue crescents at the roots of the tails, and above them a square yellow spot on the abdominal edges, and three small red ones placed above it.