The second of 1-108's "two kinds of reindeer-flies", and the whole of what the page says about which it is: "of smaller size and darker color", it "lays its eggs in the reindeer's nostrils. The larvæ go up to the throat, and penetrate the cartilage. The next year, when the maggots are full-grown, they cause a constant cough, which continues until the last one drops to the ground."

The first fly is Œstrus tarandi, whose maggot burrows into the back.

Do not reconcile the two against modern usage here. Œdemagena tarandi is today's reindeer warble fly (Hypoderma tarandi) — the one of the back — and the nose bot is Cephenemyia trompe, so Slunin's names as Bogoras carries them sit opposite to the current ones. Which name belongs to which fly is a question about the entomology of 1900 and about Slunin, not about this page, and the page is unambiguous on the biology: this is the nostril fly. Recorded as printed.