The above is the title of a paper received from the author, and published in the Proceedings of the Zoological Society of London (February 15th, 1881), in which his Lordship characterizes three new genera : Phryganeopsis—one species, P. brunnea; Aræolepia—one species, subfasciella; and Euceratia—two species, castella and securella. He also describes as new Calantica polita, Plutella interrupta, P. albidorsella and P. vanella; Cerostoma falciferella, C. cervella, C. sublulella, C. dentiferella, C. canariella and C. frustella; Depressaria sabulella, D. argillacea, D. arnicella, D. klamathiana, D. posticella, D. nubiferella, D. parilella and D. umbraticostella; Menestia rubescens ; Glyphipteryx regalis, G. californiæ, G. bifasciata, G. unifasciata and G. quinqueferella, and Heliodines extraneella.