Papiliones, this departure from the type may be looked for either in the form of the antennæ, the position of the wings, or the time of flight. The first is obviously the most tangible should it occur, and it does occur. In Urania, the antennæ have become setaceous; the club has entirely disappeared, yet the other peculiarities remain much as in Papilio. This single deviation may be assumed as pointing out a relation to Geometra, which the reader will perceive is supposed to meet the sub-class Papilio at this point. A second peculiarity is to be found in an insect figured by Godart, a Polyommatus in shape, but with pertinated antennæ;[36] the genus he has very suitably named Barbicornis. This deviation, it must be observed, is in favour of the Bombyces, which we therefore suppose touching the sub-class at this point. A third deviation, of a very different kind, is observable in an insect which Latreille has figured in the Règne Animal, and placed among the Sphinges: he calls it Coronis D'Urvillii. The antennæ in this genus, as in Castnia, are gradually incrassated, and they may probably be eventually both considered as Papiliones: of Coronis D'Urvillii, I cannot entertain a doubt, as the wings are too expansive, the antennæ too long, the abdomen too short for it ever to retain its station among the Sphinges; the inferior wings are also very decidedly caudate, a common formation among Papiliones, but unknown among Sphinges; but, let this question be eventually decided _pro_ or _con_, the approach between Hesperiæ and Sphinges is not likely to be disputed, nor the fact that it takes place somewhere in the neighbourhood of the genus Castnia. [36] Latreille seems to think this to have been a deception, and that the antennæ which Godart found on the insect did not belong to it. I cannot suppose that the latter author could have been so grossly deceived.