The visitor could be a Tarnished Plant Bug identified by the yellow markings on the end of the forewings, but it most likely is the squash bug due to the flat back and long legs and long antenna. If it is a squash bug it should stink when you squish it. The other name for the squash bug is stink bug. In either case, this guy will feed on melons, squash and cucumbers and hibernates under old boards, old vines and piles of trash. In spring they lay eggs on your crops. The best control now is to clean up the garden removing all vines and debris. Rotate your crops so you are not planting the host plants (squash, melons, cucumbers) in the same area. Radishes and marigolds planted with your squash next year may help to repel the stink bugs you miss during winter cleanup. Growing plants vertically off the ground will also cut back on the population next summer. Soap sprays and sabadilla dust helps to control stink bugs at the first sign of the adults in late spring. You can also set a board on the damp ground next to your susceptible crops and collect any eggs or adults hiding under the board during the day. The stink bug can really destroy seedings so start your squash and melon seeds indoors or cover the young plants with a row cover until they bloom to keep out the bugs. Avoid lose mulches like hay this year and instead us paper, sawdust or plastic to keep down weeds. Don't worry too much - some years are just worse than others for certain insects and the natural predators of the stink bug (wolf spiders, tachinid fly, birds) will help keep this stinky bug in control.  Keep growing, Marianne Binetti