As considerable doubt appears to exist with regard to the three species or races of Physonota described by say, Randall, and Walsh and Riley, and as I had in former years found a species of this genus to be rather common in the vicinity of Montreal, I endeavored during the past season to find it again, and, as far as my opportunities would permit, work up its life history.

Early in May I made a careful search in the locality where I had previously found it, but at this date its food plant had not yet appeared above ground. I tried again in June, the time at which I had formerly taken the first brood.