236 PR.OC. ENT. SOC. WASH., VOL. 56, NO. 5, OCTOBER 1954 obtaining the wasps, one of us (KVK) attempted to make a compre-hensive collection of these flies during tlie trip. All specimens were taken on sand flats. Metopia lateropili Allen (?). Everglades (1$). Metopia leucocephala (Eossi). Everglades (4 2 2,3 $ $). Phrosinella fulvicornis (Coq.). Arcadia (12). Gymnoprosopa polita Tns. Miami (3 2 2). Senota'mia litoralis Allen. Marco (12), Arcadia (1 $ ) . Senotainia rubriventris Macq. Collier-Seminole State Park (12), Ar-cadia (8 2 2, 18 5 S). Senotainia trilineata Wulp. Miami (3 6 $). AN OUTLINE OF A EECLASSIFICATION OF THE EPHEMEEOPTEKAi By George F. Edmunds, Jr.2 and Jay K. TkaverS At the present time the writers have in preparation a more extended paper on the suprageneric classification of the Ephe-meroptera. It will be sonje time before this manuscript will be completed, and in the meantime we have some papers in press, in which the new classification will be nsed. Also some of our colleagues have urged us to make the classification available. Although hesitant to publish our new arrangement without explaining the reasons for our decisions, we find it desirable to do so under the present circumstances. Until such time as a discussion of the origin and author-ship of the family names can be given, and until some of the protested decisions of the Copenhagen Meetings of the International Commission of Zoological Nomenclature con-cerning family and superfamily names are clarified, we re-luctantly omit the authors of family and superfamily names. We are, in accordance with the new rules, restoring the well-known family names Polymitarcidae (in place of Ephoridae or Ephoronidae) and Prosopistomatidae (for Binoculidae), the family names being based upon available subjective syno-nyms of the type genera. "VVe are tentatively including as valid genera a few generic names of doubtful validity. The names Procloeon and Pseudocloeon of S. Matsumura (1931) are impossible to apply in the present state of our knowledge. Both names are homonyms of valid genera of Baetidae ; they are referred to the family Ephemerellidae in Zoological Record. iThe publication of and research leading to this paper were supported by a grant from the University of Utah Eesearch Fund. ^University of Utah, Salt Lake City. ^University of Massachusetts, Amherst.