Wikipedia
Alopecosa
Alopecosa is a spider genus in the family Lycosidae (wolf spiders), with about 140 species and several subspecies. Most species grow up to 2 cm. Alopecosa females make a burrow in which they deposit their egg sac. The female then stays in the burrow guarding the sac until the eggs hatch.
In Germany, there are about 15 described species. There is at least one in the United States.
They favor dry climates.