▁the ▁family ▁Cos m opter ig idae . ▁It ▁was ▁described ▁by ▁Mey rick ▁in ▁ 1 8 8 9 . ▁It ▁is ▁found ▁in ▁Australia , ▁where ▁it ▁has ▁been ▁recorded ▁from ▁Western ▁Australia . ▁ ▁References ▁ ▁Natural ▁History ▁Museum ▁Le pid optera ▁generic ▁names ▁catalog ▁ ▁Category : Mac rob ath ra ▁Category : M oth s ▁described ▁in ▁ 1 8 8 9 <0x0A> </s> ▁Mu co ad hes ion ▁describes ▁the ▁attract ive ▁forces ▁between ▁a ▁bi ological ▁material ▁and ▁m uc us ▁or ▁m uc ous ▁memb rane . ▁M uc ous ▁memb ran es ▁ad here ▁to ▁ep ith el ial ▁surfaces ▁such ▁as ▁the ▁g astro int est inal ▁tract ▁( G I - t ract ), ▁the ▁v ag ina , ▁the ▁lung , ▁the ▁eye , ▁etc . ▁They ▁are ▁generally ▁hydro ph il ic ▁as ▁they ▁contain ▁many ▁hydro gen ▁mac rom ole cules ▁due ▁to ▁the ▁large ▁amount ▁of ▁water ▁( appro xim ately ▁ 9 5 %) ▁within ▁its ▁composition . ▁However , ▁m uc in ▁also ▁contains ▁g ly cop rote ins ▁that ▁enable ▁the ▁formation ▁of ▁a ▁gel - like ▁subst ance . ▁Under standing ▁the ▁hydro ph il ic ▁bond ing ▁and ▁ad hes ion ▁mechan isms ▁of ▁m uc us ▁to ▁bi ological ▁material ▁is ▁of ▁ut most ▁importance ▁in ▁order ▁to ▁produce ▁the ▁most ▁efficient ▁applications . ▁For ▁example , ▁in ▁drug ▁delivery ▁systems , ▁the ▁m uc us ▁layer ▁must ▁be ▁pen etr ated