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