During the past summer I have had the opportunity, through the kindness of Dr. Howard, of working over the unnamed material of the genera Dactylopius, Ripersia, and Phenacoccus, belonging to the collection of the Division of Entomology, U. S., D. A. I wish to record here the identity of D. vastatar, Mask., with D. filamentosus, Ckll., and two species which I believe to be new. I hope in a subsequent paper to give further notes on some of the other species found, and also to record the new host plants found for a number of species.