ERRATUM. Because of an unfortunate error,the index to Volume 32 as it appeared in Volume 32, 4 is incorrect. The correct Index to Volume 32 appears at the back of this issue,Volume 33, 1.

Most Hepialidae have a single-layer wing covering of hollow scales. In the South American genera Callipielus and Dalaca, however, a very characteristic ‘type-2’ bilayer wing scale covering is present. As only Callipielus and Dalaca among 28 investigated hepialid genera have this type of wing scale covering, the two genera may be considered sister taxa.