. Contributions to the biology of the Danish Culicidae. Mosquitoes; Malaria. 107. Systematical and faunistic remarks. As my specimens have not pale rings in the middle of the metatarsi, these being quite black, it is only with great hesitation that I refer my specimens to this species. As how- ever I have never seen the male, I suppose that provisionally we had better refer them to the old well-known species. On an excursion in September 1914, to one of the little ponds near Donse in the north-eastern part of See- land, a locality well known to botanists and zoologists, I was sitting in my boa
. Contributions to the biology of the Danish Culicidae. Mosquitoes; Malaria. 107. Systematical and faunistic remarks. As my specimens have not pale rings in the middle of the metatarsi, these being quite black, it is only with great hesitation that I refer my specimens to this species. As how- ever I have never seen the male, I suppose that provisionally we had better refer them to the old well-known species. On an excursion in September 1914, to one of the little ponds near Donse in the north-eastern part of See- land, a locality well known to botanists and zoologists, I was sitting in my boat near a sunlit, prominent point of the shore. Some plants were laid upon a tray, half fdled with water. While searching for larvae of Coleoplera my attention was now and again attracted by some large mosquito larvae which crept over the bottom in a ser- pent-like manner, when the tray was shaken. It struck me that it was really a peculiar season to find fullgrown Tceniorhynchuspupa. Ca/ex-larvae. I caught one of them and placed it in a Cephalothorax with the two r trumpets. high cylinder-jar. To my astonishment I saw that the animal was undoubtedly heavier than the water and that it sank slowly downwards and settled itself horizontally on the bottom. Moreover I saw that the animal did not at all swim like a common , but always swam horizontally; it was extremely sluggish and had a milky-white colour, very different from the brown colour characteristic of most of our Danish Culex- larva?. I observed that the sipho was of a peculiar structure, but on using a lens with high power I immediately understood that I had made one of the most remarkable discoveries made in our freshwaters for a long time past. Some weeks before, I had received a separate copy from Dyar and Knab (Entom. News 1910 p. 259) re- lating to a peculiar mosquito larva, Mansonia pertar- bans; the paper was cited in my work on Aquatic Insects (1915), then just in press. The larva is re- co
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmalaria, bookyear1920
