The cranefly Tipula trifascingulata new for the Netherlands (Diptera: Tipulidae)

Craneflies of the family Tipulidae are a well-known group of the Diptera, consisting of large, long-legged nematocerous flies. Many species are more or less uniform yellow, grey or brown, but some are bright red or yellow and black. The wings can have extensive dark patterns. The subgenus Pterelachisus of the genus Tipula holds nine species in the Netherlands and in this paper species number 10 is introduced: T. (P.) trifascingulata. It is a rather conspicuous insect with a very characteristic wing pattern. It was only known from 25 records worldwide. In 2012, the year of discovery in the Netherlands, the species was found no less than nine times, in different parts of the country. This is an indication that the species has recently reached the Netherlands and is expanding its range.