It may be necessary o state that the names which I have used for the different nervures of the wings in thesc papers are those used by Dr. Clemens, and differ somewhat from those in use by European entomologists.

Various means may be used for the purpose of denuding the wings of their scales, so as to render the neuration distinct. The wing may be process repeated slightly between two pieces of moinstened bibulous paper, and the process repeated until the wing is sufficiently denuded ; or, if this does not denude it sufficiently, the fewremaining scales may be removed with a camel's or sable hair brush.