In a collection of the early stages of Simuliidae, made by Mr F. W. Edwards, in the summer of 1923, from the rapids above Tännforsen waterfalls, Sweden, there are representatives of 11 species of Simulium: larvae and pupae of S. venustum Say and S. tredecimatum Edw., larvae of S. morsitans Edw. and S. reptans var. galeratum Edw., pupae of S. tuberosum Lundstr., larvae and pupae of S. pusillum and pupae of S. pallipes Fries and S. lyra Lundstr., besides pupae of three other indeterminable species. In a previous paper I have already described, in detail, the early stages of the first five species, and in the present paper I deal for the first time with the remaining six species and the early stages of S.ferruginum Wahlgr. The pupae of S. pusillum Fries, S. pallipes and S. lyra were identified by Mr Edwards, by dissecting out the male genitalia, but those of the remaining three species, herein described as species I–III, are indeterminable owing to their immaturity. It seems inadvisable to give the pupae new specific names as further investigation may prove that they belong to well-known Continental species.