Genus ANTAPLAGA Grote A small genus composed exclusively of western species. (1) Antaplaga dimidiata Grote, Plate XXVII, Fig. 7, male. Hitherto only reported from Colorado. Genus GROTELLA Harvey (1) Grotella dis Grote, Plate XXVII, Fig. 8, male. A small moth found in New Mexico and Arizona. Genus PIPPONA Harvey The only species hitherto referred to this genus is found in Texas. We give in the cut, which is herewith presented, a figure of a specimen which is contained in the American Museum of Natural History, and which was carefully drawn for this book by Mrs. Beutenmuller. It was named bimatris by Dr. Harvey. Genus BESSULA Grote Through the kindness of the authorities of the British Museum and Sir George F. Hampson I am able to give herewith a figure of the type of the genus and species, which is preserved in the Grote Collection. The moth occurs in New Mexico and Colorado.