In an article on the genns Lecanium, Published in the Canadian Entomologist, Vol. 34, p. 177 (1902), I stated that I inferred that Costa proposed generic names for the Coccidæ in his Prospetto di una nuova descrizione metodica del genera Coccus L., work I had not seen at that time, as no copy could be found in the libraries of this country or in London. Mr. Fernald has, however, recently secured a copy of this exceedingly rare work, published in 1828, from Naples, Italy.