Havin been asked by Sir William Dawson to look over two collections of insects which had been sent in in competition for a prize, I was delighted to find in one of them a speciment of this very rare moth.

Knowing that everything in connection with the capture of such a rarity would be of interest, I asked Sir William to ascertain from Mr. R. McDougall, the collector, all the facts that he could furnish in connection with such an interesting event, and I duly received, through Sir William, a letter about it, from which I extract the following account:-

“The moth was caught at Ormstown, Chateauguay County, and was the only one observed during the summer.