Genus ALARODIA Moeschler (1) Alarodia slossoniae Packard, Plate XLVII, Fig. 18, female. (Slosson's Slug.) This remarkable little species inhabits in the larval stage the mangroves which grow in the swampy lands on the southern coast of Florida. A good account of its habits has been published by Dr. Dyar in the "Journal of the New York Entomological Society," Vol. V, and indeed the student who desires to know about the habits of this and all other species of the Cochlidiidae found in North America must consult the writings of this author, who has made these insects the subject of special and exhaustive inquiry. Genus PROLIMACODES (1) Prolimacodes scapha Harris, Plate I, Fig. 9, larva; Plate XLVII, Fig. 8, female. (The Skiff Moth.) Syn. undifera Walker. The moth has a wide distribution throughout the Appalachian subregion. The larva feeds upon a great variety of shrubs and trees. It appeared to me in my boyhood, when I reared it often, to have a particular fondness for the leaves of the sycamore (Platanus). Genus COCHLIDION Hubner (1) Cochlidion biguttata Packard, Plate XLVII, Fig. 4, female. Syn. tetraspilaris Walker. A native of the eastern portions of the region. (2) Cochlidion rectilinea Grote & Robinson, Plate XLVII, Fig. 27, male. The insect is quite common locally, and has the same distribution as the preceding species. (3) Cochlidion y-inversa Packard, Plate XLVII, Fig. 21, male. The distribution of the species is the same as that of the two preceding. The larva frequents hickory.