A Note on the Larva of Datana Floridana Graef

that it could not be separated from M. albus which I lately described fi’om specimens on a malvaceous plant in Jamaica! There are differences, indeed, in the color of the exuviae and other small points, whereon a new variety is founded--but after comparing concolor with the types of albus, can see nothing to separate them specifically. Thus we have :-(a.) albus. Jamaica, on a malvaceous plant, alt. 5o feet above the sea, climate very humid, tropical. (b.) albus v. concolor. New Mexico, on a chenopodiaceous plant, alt. 3,8oo ft., climate very dry, not’tropical. (One can scarcely say temberate, the summer heat being greater than in Jamaica). Truly a singular distribution