I first made the acquaintance of Papilio brevicauda in Cape Breton in the summer of 1936 when engaged on an Insect Faunal Survey of this region. We (i.e., my assistant Mr. T. N. Freeman and myself) had made our head-quarters at the picturesque town of Baddeck on Little Bras d'Or Lake and on the afternoon of July 12th I decided to row over to the small island opposite the town, which forms the eastern side of the harbour; this island is heavily wooded down to the water's edge except for a small strip of sandy beach on the Irest side, which is grown over with various coarse grasses and numerous low plants, chief among which is a flourishing colony of lovage (Ligusticum scothicum), a plant which to my knowledge does not accur on the mainland in this region.