I have sufficiently shown in various places (and the enquiring student may consult the originals) that Kirby's description of Ruficaudis contradicts that of Uniformis, in what we must regard as essential partiuclars in this genus. We have not here to do with a species; but, according to Mr. Hulst's statements, with a dimorphic form of Thysbe, in which the inner margin of the terminal band of primaries is even, not dentate, on the interspaces.