▁C . ▁o str y ae ▁ ▁Reg al ▁moth s ▁( C ither onia ▁reg alis ), ▁whose ▁c ater p ill ars ▁are ▁known ▁as ▁h ick ory ▁horn - dev ils ▁ ▁Wal nut ▁s ph inx ▁( Am or pha ▁jug land is ) ▁ ▁The ▁b ride ▁( n omin ate ▁sub species ▁Cat oc ala ▁ne og ama ▁ne og ama ) ▁ ▁H ick ory ▁t us sock ▁moth ▁( L oph oc ampa ▁c ary ae ) ▁ ▁The ▁h ick ory ▁leaf ▁stem ▁gall ▁ph yl lo x era ▁( Ph yl lo x era ▁c ary a eca ul is ) ▁also ▁uses ▁the ▁h ick ory ▁tree ▁as ▁a ▁food ▁source . ▁Ph yl lo x er idae ▁are ▁related ▁to ▁a ph ids ▁and ▁have ▁a ▁similarly ▁complex ▁life ▁cycle . ▁E gg s ▁h atch ▁in ▁early ▁spring ▁and ▁the ▁g alls ▁quickly ▁form ▁around ▁the ▁developing ▁insect s . ▁Ph yl lo x era ▁g alls ▁may ▁damage ▁weak ened ▁or ▁str essed ▁h ick ories , ▁but ▁are ▁generally ▁har ml ess . ▁De formed ▁leaves ▁and ▁tw igs ▁can ▁rain ▁down ▁from ▁the ▁tree ▁in ▁the ▁spring ▁as ▁squ ir rel s ▁break ▁off ▁inf ected ▁t issue ▁and ▁eat ▁the ▁g alls , ▁possibly ▁for ▁the ▁protein ▁content ▁or ▁because ▁the ▁g alls ▁are ▁f les hy ▁and ▁t ast y ▁to ▁the ▁squ ir rel s . ▁The ▁pec an ▁gall ▁cur cul io ▁(