Reference
Alex M. Hemmingsen (1970): On the copulation in Phyllolabis hemmingseni Peder Nielsen and Phyllolabis mannheimsiana Peder Nielsen (Limoniinae, Tipulidae, Diptera) – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 21: 137 - 144.