Chrysomela labyrinthica, Lec. This insect is, I believe, by some entomologists thought to be a variety of C. scalaris, Lec. I incline myself to the belief that it is a distinct species, but my knowledge of it is too limited for me to form a decided opinion. Both forms occur here; scalaris is common wherever basswood or elm are found; labyrinthica is scarce, and as far as my experience goes, is confined to one locality, viz., that portion of the Mountain Park lying between the head of Redpath Street and the road through the Park. I have only found labyrinthica during the early part of summer; scalaris occurs both in spring and fall. Mr. Moffat, who records labyrinthica from Hamilton (Can. Ent., vol. xiv., page 57), took a specimen on May 23rd, and found its season to last about four weeks, during which he took over a dozen. It appears to be very rare, and is in very few lists. Mr. Pettit does not give it in his Grimsby List. Mr. D'Urban records scalaris common at Montreal, but does not mention labyrinthica. The same author, in his list from the Valley of the River Rouge, gives scalaris as “abundant on alders throughout the district, from the end of June to the end of September,” but says nothing of labyrinthica. Mr. Ritchie gives both scalaris and labyrinthica in his Montreal List, but without dates.