In January of this year Mr. A. H. Kirkland sent me specimens of a scale insect he had taken from Prunus mume at the Arnold Arboretum, Jamaica Plain, Mass., which on examination proved to be Diaspis amygdali, Tryon. A little later Mr. Kirkland sent me more specimens which he had taken from Prunus subhirtella at the Arboretum. Specimens of the scale were sent to Dr. L. O. Howard, who confirmed my identification, stating also that he had asked Mr. Coquillett to examine the specimens and had received the report that he could find no difference between them and Diaspis amygdali. The infested trees came from Japan, the Prunus mume in the spring of 1894 and the Prunus subhirtella in the spring of 1897.