▁in ▁the ▁loc ust s ▁Loc usta ▁migr ator ia ▁and ▁Sch ist oc erca ▁gre g aria ▁and ▁is ▁generally ▁associated ▁with ▁a iding ▁flight . ▁Early ▁observations ▁of ▁loc ust s ▁showed ▁that ▁despite ▁the ▁fact ▁that ▁lip ids ▁are ▁met abol ised ▁by ▁flight ▁mus cle ▁in ▁order ▁to ▁maintain ▁flight , ▁which ▁would ▁be ▁transport ed ▁from ▁the ▁ha em ol ym ph , ▁there ▁was ▁often ▁still ▁a ▁high ▁concentration ▁of ▁lip ids ▁in ▁the ▁ha em ol ym ph , ▁imp lying ▁that ▁an ▁agent ▁may ▁be ▁responsible ▁for ▁activ ating ▁li pid ▁transport ▁into ▁the ▁ha em ol ym ph ▁and ▁this ▁was ▁thought ▁most ▁likely ▁to ▁be ▁h orm onal ▁reg ulation . ▁The ▁h orm one ▁itself ▁is ▁part ▁of ▁a ▁larger ▁family , ▁often ▁referred ▁to ▁as ▁red ▁p ig ment ▁concentr ating ▁h orm ones ▁( R P CH ) ▁discovered ▁in ▁cr ust ace ans ▁and ▁the ▁typical ▁make up ▁of ▁h orm ones ▁in ▁this ▁family ▁includes ▁a ▁length ▁between ▁ 8 ▁and ▁ 1 0 ▁am ino ▁ac ids , ▁blocked ▁N ▁and ▁C ▁term ini , ▁phen yl al an ine ▁or ▁ty ros ine ▁at ▁position ▁ 4 ▁and ▁try pt oph an ▁at ▁position ▁ 8 . ▁R P CH ▁was ▁discovered ▁in ▁cr ust ace ans ▁and ▁shown ▁to ▁be ▁involved ▁in ▁concentr ating ▁red ▁p ig ments , ▁for ▁sexual ▁displays ▁and ▁a ▁variety ▁of ▁other ▁reasons . ▁The ▁similarity ▁between ▁A K H