One of the most commonly encountered spiders. This is a member of the Theridiidae and it is known appropriately as the Common House Spider, Achaearanea tepidariorum. Often found in the corner of garages, under boards and stones, around bridges. This is the spider that makes the tangly disordered web that is much like the Black Widow Web. Widows are also in this family. That is the egg sack nearby which this spider usually hangs out near. The upside down posture in her web is normal.