Valley of the River Rouge f ^'c, 87 



Bouge. At that time we were camped on the grass of the clear- 

 ino", under some scattered elm and ash trees, and the larvae, which 

 were numerous in the tents, appeared to have been blown out of 

 these trees by the high winds, and were rapidly crawling about in 

 search of a suitable place to spin their suspending girths, and un- 

 dergo their transformations. Just before assuming the pupa state, 

 they became dark brown in colour, with some lilac stripes and 

 spots. On the 31st August, I met with a larva on an alder bush, 

 across a leaf of which it had spun a bed of silk, and was repos- 

 ing upon it in its usual manner, with the anterior segments 

 drawn in and swollen out, so as to render the ocellated spots on 

 the third segment very conspicuous. When in this position, these 

 larvae, if disturbed, rock themselves slowly from side to side, 

 throwing out the forked orange tentacle, which is usually concealed 

 from view in the segment behind the head, emitting at the same 

 time a very acrid odour. The pupa is whitish-brown on the back 

 and abdomen, with a darker line down the sides, and the wing-cases 

 are dark brown, or black. This splendid butterfly frequently as- 

 sembles in great numbers about wounds on the roots of trees from 

 which sap exudes, and also about decaying fish and animal matter. 

 On the shores of Sugar-bush Lake in the Township of Montcalm, 

 on the 25th June, I counted fifty- six individuals crowded together 

 in a space, not exceeding six square inches, where a dead cat-fish 

 had lain for some time, and others were constantly ariving, flying 

 straight to the spot against the wind, as though they had scented 

 it from afar. On several occasions more than a dozen specimens 

 -were captured at a single grasp of the hand, having become so 

 gorged and drowsy with their disgusting repast, as to be unable 

 to fly. 



2. F. asterias^ Fab. (Black Swallow-tail.) — Figured and des- 

 cribed in the "Canadian Nat. and Geol." vol. 2, pi. 3, p. 220. A large 

 black butterfly seen by myself, as it sailed rapidly through the 

 woods, on the borders of Chain Lake, Montcalm, 17th June, I 

 supposed to be this species. It was not, however, again met with, 

 which is not surprising, considering the scarcity of Umbelliferous 

 plants in this district. 



3. CoUas phUodice, Godt. (Clouded Sulphur.) — Figured and 

 described in the " Canadian Nat. and Geol." vol. 2, pi. 4, p. 313. 

 Numerous at Grenville on the 5th June, but I did not observe it 

 again till the 30th of that month, after which it was not uncommon 

 :along the banks of the Kouge. At Hamilton's farm^ 50 miles up 



