an electric grid secured to and substantially surrounding {HEAD ~ said housing}, for destroying {TAIL ~ insects} upon their contacting the grid 
for destroying
an electric grid secured to and substantially surrounding { HEAD ~ said housing } , for destroying { TAIL ~ insects } upon their contacting the grid
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH