Yes, I agree, too. A female, and a bit smaller than average.
The arrangement of pubescence and structure of the pronotum on this specimens is a good match to the pair of I. diehli in my collection that were identified by Holzschuh. Sometimes, I. simulator and I. ephebus have their pubescence rubbed a little which makes them look a little like this species. Imbrius diehli is not common.