Megachile pugnata, f, face, National Arboretum, DC
Megachile pugnata, f, face, National Arboretum, DCThe magnificent mandibled Megachile pugnata. Look how long and wide those mandibles are. Its not clear to me why this species requires much longer mandibles than others, it appears to not be cutting out larger pieces of leaves for its nests, but perhaps it is the type, processing and location of the leaf material that is important.