The confinement of the genus chionobas to high latitudes affords an example regarding distribution of species. Their food being lichens peculiar only to the Alpine regions, must confine them within a limited range. Mr. Scudder, in his “Revision of the hitherto known species of the genus chinobas, of North America”–proceed. Ent. soc. philad., vol. 5, pp. 26-28–gives them three or four localities; but these are either arctic, sub-arctic or Alpine.