Large Marsh Horsefly - Tabanus autumnalis

Wing length is 13 to 16 mm and  16 to 22 mm in body length. A fairly large horse-fly. The dark abdomen has a central row of pale triangles and a dark and broad central stripe on the underside. The eyes lack stripes.

Tabanus bromius is similar but smaller with a body length around 14 or 15 mm. Tabanus bovinus on the other hand is larger with a body length of 25 to 30 mm.

• 17-21mm
• eye without bands
• antennae all black
• abdomen with central row of pale triangles
• ventral abdomen with a broad central stripe

Wet grassland and marshy areas, especially when cattle are present. Often seen sunning on fences, not hovering.

Peaking in June and July.

This species which has previously been rather uncommon in Britain now seems to be extending its range.

Status in Leicestershire and Rutland not known.