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