wood grove planthopper 
Woolly Alder Aphid 
Woolly Apple Aphid 
Woolly elm aphid 
Woundwort shieldbug 
Xestocephalus fulvocapitatus 
Yellow-bellied Bee Assassin 
Yellow-dotted Gum Tree Shield Bug 
Yellow-faced Leafhopper 
Yellow-headed Leafhopper 
Yellow-spotted Stink Bug 
Yellow-striped Leafhopper 
Yoyetta abdominalis 
Ypsilon stink bug 
Yucca Plant Bug 
Zammara smaragdula 
Zammara tympanum 
Zanna nobilis 
Zanna terminalis 
Zuata transita