This biasing force will return {HEAD ~ the flap portion} into {TAIL ~ contact} with the base once an insect has lifted the flap to enter the trap 
into
This biasing force will return { HEAD ~ the flap portion } into { TAIL ~ contact } with the base once an insect has lifted the flap to enter the trap
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH