Tetramesa longicornis (Walker, 1832)

on Festuca

Tetramesa longicornis: larva

larva; from Claridge (1961a)

Tetramesa longicornis: opened gall on Phalaroides arundinacea

Phalaroides arundinacea, France, dép. Ardennes, Signy-le-Petit, 19.vi.2017 © Sébastien Carbonnelle


one to four larvae live in an single internode, without causing swelling. Two generations; the larva of the second generation hibernate in the dead culms.

host plants

Poaceae, monophagous

Phalaroides arundinacea.

A reference to Festuca by Dauphin & Aniotsbehere must be erroneous.


Harmolita, Tetramesa depressa (Walker, 1832); Isosoma depressum.


Buhr (1964a), Claridge (1961a), Dauphin & Aniotsbehere (1997a), Dawah (1987a), Henneicke, Dawah & Jervis (1992a), Houard (1908a).

mod 19.i.2019