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