J. tumida, Salmon, and J. berculena Serrander in that year Mr Davidson divided it into two smaller genera, conforming the former Orysta to that sectum for which if you cannot affix either with a tumida or herculana for the type and adjusting Spinifera, the type, for the other type J. concentrica. It was afterwards found that Orysta as thus rededined includes two genera, and in consequence it has been again divided by separating all those typified or J. berculana under the genus of Orysta, a genus well and but not clearly defined morphologically. For which I believe to be the true one Those who contend are opposed to this arrangement contend that, as all the species which Orysta placed in the same at the time he first described it belong to the group typified by J. concentrica the name Orysta