Bark at the moon

Seth woke me up yesterday morning to ask me where there was a jar he could catch a spider in. He said he had a baby tarantula out on the front porch. I directed him to the jar then figured I'd better go check to make sure he was o.k.
I went out to find Seth standing on the porch with the jar in one hand and trying to catch Titus with the other. Apparently Titus had sniffed at the spider and it had jumped up on Titus for a ride.
Titus immediately came running for me and started rubbing against my legs and romping around. All I could think was that the spider was going to hop off of Titus and climb onto me and run up my bare leg. Gah!
We managed to get Titus to hold still long enough for Seth to collect the spider in the jar.
We have been looking at this spider for the past couple of days and we're not really sure it is a tarantula. I think it might be a wolf spider but it's awfully big. Hmmmmm.....