Phylogeny and host-plant evolution in Melittidae s.l. (Hymenoptera: Apoidea) Denis Michez, Sébastien Patiny, Pierre Rasmont, Kim Timmermann and Nicolas J. Vereecken Apidologie, 39 1 (2008) 146-162 Published online: 23 January 2008 DOI: 10.1051/apido:2007048