I would like to inform you that Leave Cutter Bee in fact can suck nectar from flower as well as sting and bite or cut a leaf ,because of its mouth part has a sharp mandible(sharp brade) in family :MEGACHILIDAE . I found that there are 2 genus of this families could cut the leaves into ellipse shape ; Megachilla spp. and Chalicodoma spp.,but sorry for those picture of them. Thank for contact me, kanok uraisakul