Micro displacement not rendering with motion blur. (Blender 2.79 ) Most of the bee is animated, specifically the wings, each flap is around 3 frames so there should motion blur happening at least with the wings.

I've attached the pertinent screen shots of settings as reference. 

I've also tried rigging a primitive object with bones and animating it next to the bee with the same settings which does render with motion blur.
As of 2.79, Cycles does not support adaptive (micro) subdivision and deformation blur on the same mesh. You should uncheck "adaptive" on the subdivision surface modifier if you need deformation blur.

See this documentation page from the main developer of this feature: https://wiki.blender.org/index.php/User:Maiself/Micropolygon_Displacement