Willow Mason Wasp 
Willow Oak Sawfly 
Willow Sawfly 
Willughby's Leafcutter Bee 
Wool Sower Gall 
Woolly Alder Sawfly 
Woolly Catkin Gall Wasp 
Woolly Oak Gall 
Woolly Sweat Bee 
Xanthopimpla punctata 
Xanthopimpla stemmator 
Xylocopa auripennis 
Xylocopa dejeanii 
Xylocopa insularis 
Xylocopa iris 
Xylocopa myops 
Xylocopa valga 
Xyloperga univittata 
Yelicones nigromarginatus 
Yellow and Black Potter Wasp 
Yellow Crazy Ant 
Yellow meadow ant 
Yellow oriental paper wasp 
Yellow sand wasp