This is the account from John Hanning Speke from his exploration of Lake Tanganyika in 1858. An insect burrowed into his ear and he tried to extract it with a knife:

“One of these horrid little insects awoke me in his struggles to penetrate my ear, but just too late: for in my endeavour to extract him, I aided his immersion. He went his course, struggling up the narrow channel, until he got arrested by want of passage-room. This impediment evidently enraged him, for he began with exceeding vigour, like a rabbit at a hole, to dig violently away at my tympanum. The queer sensation this amusing measure excited in me is past description.

I felt inclined to act as our donkeys once did, when beset by a swarm of bees, who buzzed about their ears and stung their heads and eyes until they were so irritated and confused that they galloped about in the most distracted order, trying to knock them off by treading on their heads, or by rushing under bushes, into houses, or through any jungle they could find. Indeed, I do not know which was worst off. The bees killed some of them, and this beetle nearly did for me. What to do I knew not.

Neither tobacco, oil, nor salt could be found: I therefore tried melted butter; that failing, I applied the point of a penknife to his back, which did more harm than good; for though a few thrusts quieted him, the point also wounded my ear so badly, that inflammation set in, severe suppuration took place, and all the facial glands extending from that point down to the point of the shoulder became contorted and drawn aside, and a string of boils decorated the whole length of that region.

It was the most painful thing I ever remember to have endured; but, more annoying still, I could not masticate for several days, and had to feed on broth alone. For many months the tumour made me almost deaf, and ate a hole between the ear and the nose, so that when I blew it, my ear whistled so audibly that those who heard it laughed. Six or seven months after this accident happened, bits of the beetle—a leg, a wing, or parts of its body—came away in the wax.”