a heavy spike of iron, or of wood burnt and sharpened to a point, and weighted with a large stone. This, by an ingenious contrivance, is fastened to the branch of a tree overhanging the animal’s path as it leaves the water at night to graze, by a rope attached to a catch, the other end of the rope being brought down, fixed about a foot from the ground, across the path, and tied to one of the trees opposite. As the animal presses against the rope the catch is freed, and down comes the spike. The northerners, who live on the shores of the lakes, Kamadou particularly, kill them from canoes with spears like harpoons, which, once firmly fixed, serve to show by their shafts the direction taken by the wounded beast, and enable the men to follow him and repeat the attack until, utterly weakened from loss of blood, he is secured by ropes and drawn ashore. This plan, which seems to me to have its drawbacks and dangers, is not attempted on the rivers, and I was never an eye witness of it, even on the lakes; but I have two or three of the harpoon assegais, and this was the story of the hunting as told to Livingstone. On the low Siloquana hills near this we made our acquaintance with the Tsétsé fly, which we were the first to bring to notice; Vardon taking or sending to England some he caught on his favourite horse. They have now been thoroughly discussed entomologically, and I would only very lightly touch upon them. The _Glossina morsitans_ is a dusky grey, long-winged, vicious-looking fly, barred on the back with striæ, and about the size of the fly you so often see on dogs in summer. Small as he is, two to three will kill your largest ox, or your strongest horse--for the poison introduced by the proboscis is zymotic; the victims sicken in a few days, the sub-lingual glands and muscles thicken, the eyes weep, a defluxion runs from the nostrils, the coat stares, and in periods varying from a fortnight to three months death ensues. On examination after death the blood is found to have diminished wonderfully in quantity, to have become gelatinous in appearance, and to have parted with its colouring property. You may plunge, your hands into it and it runs off like tapioca, without staining them. The vital organs, lungs and heart, are flaccid and anæmic, but show no further sign of disease. The flesh has a peculiar glairy appearance. Wild animals are not affected, but all domesticated ones are, save the ass and the goat, and the calf as long as it sucks. Man escapes scot free. The flies settle on and bite him sharply, but no results follow.