Subject: What’s this arachnid?
Geographic location of the bug: Casa Grande, AZ (Sonoran Desert)
Time: 08:56 PM EDT
Your letter to the bugman: Found this “little” guy in my house he’s about 4 inches in diameter its currently summer here in AZ. He was climbing the wall. Didn’t find a web or eggs. We get a lot of crickets around here so that may be his diet.
How you want your letter signed: Gaston
Update: Cellar Spider
Cesar Crash provided a comment indicating this is a member of the genus Physocyclus, a Cellar Spider, and this BugGuide image would support that identification.