Which of the following spiders is NOT found in California?

The Brown Recluse Spider is the correct choice because it is not commonly found in California. This spider primarily inhabits the central and southern United States, particularly areas like the Midwest and parts of the South. Its range does not typically extend to California, making it less likely to encounter this species in the state.

The other spiders mentioned, such as the Brown Widow Spider, Black Widow Spider, and Common House Spider, are known to inhabit California. The Brown Widow and Black Widow are part of the Theridiidae family and can be found throughout the state, often in areas with disturbed habitats. The Common House Spider, also prevalent in California, is an urban species that tends to thrive in human dwellings. Understanding the distribution of these species helps in identifying and managing potential encounters with them effectively.