On the 6th of June, 1868, we observed for the first time a handsome green caterpillar eating some lettuce that we rvere growing in our graper-v ; thinking that it could not very well escape, we merely took a rough description, as follows :–Sixteen-footed caterpillar, about an inch long, pale green (almost the colour of lettuce leaves) above, deeper green below; a white dorsal line, two lateral white lines, the lower passing through the spiracles ; all five lines proceeding from head to tail. Before we secured it, it did, however, escape, probably entering the ground.

The following year, in June and early in July, we observed many similar larvæ on a number of different plants, both in the garden and in the woods.

A single full-grown specimen of the larva of this species was found under a log in a wood near London on the 11th of June. Length one inch. Head black and shining.

Body above brownish black, closely covered with tufts of moderately long stiff hairs, proceeding from elevated shining tubercles. Hairs and tubercles a little darker than the surface of body, excepting along the sides, where, although the tubercles continue the same, the hairs are changed to a yellowish-brown color.

Under surface brown, with a slight greenish tint; fifth, sixth, eleventh, and twelfth segments are each belted with a series of tufts of short yellowish-brown hairs, in continuation of those above. Feet black and shining. Prolegs yellowish-brown and hairy.

For ten years we have been trying, and trying in vain, both in England and America, to obtain a copy of Kirby's descriptions of the insects of the Northern parts of British America, contained in the fourth volume of Richardson's Fauna Boreali-Americana, published at Norwich in 1837. Many of our friends have been making similar attempts, and always with the like ill-success. We have had, however, occasional access to a copy in the iibrary of the University of Toronto, which, with the exception of one in the Library of Parliament at Ottawa, is the only copy we know of in Canada.