Hi Arno,
The two species are compared by
Simon, but without much detail. From his description, and the figures in
Kovblyuk et al., I agree your specimens are likely to be
H. invalidus, but Pierre's seems closer to
H. macellinus, which apparently is characterized by a broader and widened (sécuriforme = "beilförmige") apophysis.
But the female makes me hesitate. The only figures of the
H. invalidus epigyne I could find are those in the
description of its synonym
H. vignai, and they don't quite seem to match.
Best wishes,
Rainer