Notes on Two Strawberry Slugs, Empria fragarae Rohwer, Empria maculata Norton

The literature of economic entomology has many references to slugs that feed on strawberry foliage, discussed for the most part under the name of Harpiphoriis maculatus Norton, but also as Monostegia ignota Norton. That there were two common species of these slugs affecting strawberry plants was shown by the work of F. W. Mally (1889). During the five years 1910- 1914 inclusive, the writer has studied both these species in the insectary at Ames. The present paper is based on a study of the literature, as well as from additional notes of the writer. S. A. Rohwer, of the U. S. National Museum at Washington, examined all the saw-flies reared, and has recently described Empria fragariae. The life history notes are from the files of the entomological section of the Iowa Agricultural Experiment station at Ames. These insects are discussed in a recent bulletin from the Iowa station but some matter is incorporated here that is not mentioned in the bulletin