In 1869 Signoret described a species from Switzerland as Chionaspisalni It was found on the bark of the alder (Alnus communis). This species has never been seen in America, but in 1883 Comstock announced a form from alder and Viburnum as Chionaspis Lintneri. Since the latter date our knowledge of the matter seems to have remained without additions. Mr. James Fletcher has just sent me a Chionaspis plentifully infesting the bark of Betula papyrifera from Charlottetown, Prince Edward Island, about 46° N. lat. I examined this with interest, owing to the locality and the host plant, and on comparing it with Comstock's account of C. Lintneri, I have no doubt that it is the same.