▁as ▁an ▁upper ▁lip . ▁ ▁Mand ible ▁ ▁Che wing ▁insect s ▁have ▁two ▁mand ibles , ▁one ▁on ▁each ▁side ▁of ▁the ▁head . ▁ ▁They ▁are ▁typically ▁the ▁largest ▁mouth part ▁of ▁che wing ▁insect s , ▁being ▁used ▁to ▁m astic ate ▁( cut , ▁sh red , ▁te ar , ▁cr ush , ▁che w ) ▁food ▁items . ▁ ▁They ▁open ▁out wards ▁( to ▁the ▁sides ▁of ▁the ▁head ) ▁and ▁come ▁together ▁med ial ly . ▁ ▁Max illa ▁ ▁Pa ired ▁max illa e ▁cut ▁food ▁and ▁manipulate ▁it ▁during ▁m astic ation . ▁ ▁Max illa e ▁can ▁have ▁hair s ▁and ▁" te eth " ▁along ▁their ▁inner ▁marg ins . ▁ ▁At ▁the ▁outer ▁margin , ▁the ▁g ale a ▁is ▁a ▁cu pped ▁or ▁sc oop - like ▁structure , ▁which ▁s its ▁over ▁the ▁outer ▁edge ▁of ▁the ▁lab ium . ▁ ▁They ▁also ▁have ▁pal ps , ▁which ▁are ▁used ▁to ▁sense ▁the ▁characteristics ▁of ▁potential ▁food s . ▁ ▁Lab ium ▁ ▁The ▁lab ium ▁is ▁a ▁single ▁structure , ▁although ▁it ▁is ▁formed ▁from ▁two ▁f used ▁secondary ▁max illa e . ▁ ▁It ▁can ▁be ▁described ▁as ▁the ▁floor ▁of ▁the ▁mouth ▁and ▁function ing ▁in ▁close ▁the ▁mouth ▁of ▁the ▁insect . ▁ ▁With ▁the ▁max illa e , ▁it ▁ass ists ▁manip ulation ▁of ▁food ▁during ▁m astic ation . ▁ ▁Hyp oph ary nx ▁The ▁hyp oph ary nx ▁is ▁a ▁somewhat