The rivers contain very few fish.

Common flies are not troublesome, as they are wherever milk is abundant; they are seen in company with others of the same size and shape, but whose tiny feet do not tickle the skin, as is the case with their companions.

Mosquitoes are seldom so numerous as to disturb the slumbers of a weary man.
But, though this region is free from common insect plagues, and from tsetse, it has others.

Feeling something running across my forehead as I was falling asleep, I put up the hand to wipe it off, and was sharply stung both on the hand and head; the pain was very acute.

On obtaining a light, we found that it had been inflicted by a light-colored spider, about half an inch in length, and, one of the men having crushed it with his fingers, I had no opportunity of examining whether the pain had been produced by poison from a sting or from its mandibles.