Recently, a combined molecular and morphological phylogeny of the three closely related Osmia subgenera (Monosmia, Osmia, Orientosmia) has been published in the Biological Journal of the Linnean Society (Haider et al., 2013).
Recently, a molecular phylogeny of the genus Hoplitis has been published including 23 out of the 27 currently recognized subgenera (Sedivy et al., Zoological Journal of the Linnean Society, 167, 28-42, 2013). Unfortunately, in figures 1 and 2 Hoplitis (Prionohoplitis) epeoliformis and Hoplitis (Alcidamea) acuticornis have been mixed. In fact, H. acuticornis is sister to all the other species of the Alcidamea group, whereas H. epeoliformis is sister to H. curvipes.
The phylogeny of 46 species of the Annosmia-Hoplitis group (subgenera Annosmia, Bytinskia, Coloplitis and Hoplitis) has recently been inferred by Sedivy et al. (Biological Journal of the Linnean Society, 108, 35-54, 2013).
Claudio Sedivy (ETH Zurich, Applied Entomology) has recently started a PhD project on the phylogeny of Hoplitis, the most diverse osmiine bee genus in terms of number of species.