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There are indeed no preapical setae, only apical setae. As far as I could find, the other European species are H. trivittata, H. oldenbergi and H. lundstroemi. The first one looks very different. Online, I found a key by Okada (1967) for the Old World species, but I don't know if this key is still recent. As the mesonotum is unicolorous, by this key it would exclude H. oldenbergi and H. lundstroemi.

Unfortunately, this key doesn't illustrate the genitalia of H. confusa. As you asked, I took pictures of the aedeagus. This is the aedeagus in lateral view. I hope you can confirm the species.