Empria testaceipes (Konow, 1869)
the female causes in the leaf a series of up to ± 5 oviposition scars, that develop into a row of irregular unilocular galls that mainly protrude at the upperside of the leaf. During the first two larval instars the larvae develop within the galls, feeding on the interior; at later stages they live freely on the plant..
Breeding was also succesful on Potentilla reptans; it therefore cannot be excluded that also in nature Sanguisorba is not the only host plant.
Liston, Nyman & Kehl (2007a).