* * * * * * [Illustration: LEPTOCIRCUS _Curius_.] LEPTOCIRCUS Curius, _Clear-winged Butterfly._ ---- Sub. Family Papilionæ. Genus Urania. Sub-genus Leptocircus, _Nob._ (_Erycinian type_). SUB-GENERIC CHARACTERS. _Size and aspect of an_ Erycina; _Anterior wings_ sub-hyaline; _posterior_ greatly lengthened, and terminating in two long tails; _Head_, _thorax_, and _body_ very thick; _Anterior feet_, _palpi_, and _Antennæ_ papilioniform. ---- SPECIFIC CHARACTER. _Black; the exterior half of the superior wings hyaline, bordered with black, inner half with a green band, continued on the inferior wings, which are plicated, and edged externally with white._ Papilio Curius _Fab. Ent. Syst. 3. 1. 28. Don. Ind. Ins. pl. 47. f. 1. bad._ ---- There are only two collections we believe in this country, which possess this rare and extraordinary butterfly, and it may be even doubted whether these specimens do not belong to distinct species. One is in the Banksian cabinet, now possessed by the Linnæan Society, the other in that of the lady of our friend J. G. Children Esq. Zoologist to the British Museum. We are told the species has been "made into a genus" by some continental methodist, but who, according to the disreputable and slovenly mode fast creeping _among us_, gives no definition. We have elsewhere expressed our reasons for rejecting all such names (_North. Zool. 2. pref. lx._), and we are thus pledged to do so upon every occasion. Nature has so admirably disguised this insect in the external form of that tribe of butterflys which she intends it to represent, that it was only upon looking to its anatomical construction, that we discovered it was a type of the true _Papilionæ_, and not of the _Erycinæ_. The construction of the anterior feet, of the head and palpi, and of the antennæ, all which are here represented, magnified, places this fact beyond doubt, and leaves us nothing to desire but a knowledge of its caterpillar and chrysalis, and of the direction of the wings when the species is at rest. We suspect that like those of _Urania_, they are then _deflexed_. * * * * * * [Illustration: TROGON _Mexicanus. f._ _Mexican Trogon. fem._] TROGON Mexicanus, _Mexican Trogon. female._ ---- Tribe Fissirostris. Family Trogonidæ. _See North Zool. 2, p. 326._ GENERIC CHARACTERS. _Body_ thick. _Bill_ very short, strong, thick, nearly triangular, but the sides compressed, surrounded by long, stiff, bristly feathers, the culmen arched from the base. _Wings_ very convex, the quills graduated; tail very broad, feet short, weak, gressorial. SUB-GENERA. 1. Bill with several unequal serratures on the margin of the upper mandible: head not crested, tail even, tarsi feathered to the base of the toes; anterior toes united to half their length. America. TROGON. _Auct._