Body length : 4,5-7mm.

This species is difficult to distinguish from T. ruficornis. The pale longitudinal stripes on the 1st segment of the antenna are more contrasting in T. caelestialum.

On grasses.

Carex arenaria, Corynephorus canescens, Festuca rubra, Hordeum sp., Koeleria glauca, Lolium perenne, Oryza sativa, Zea mays, …