Obelisk of Urd from M15 would fit well here.

you can't have an insect tribal without Hornet Sting

Have you thought about Primal Vigor? With Parallel Lives, Doubling Season, and Primal Vigor counters and tokens could get crazy with a quickness!

Check this out. It's a Xira proxy I found with awesome art. Anyway I love the deck, I had a similar idea except I'm putting in spiders also. I'm using a lot of your build as a primer. Thanks! Also you should check out Gigapede and Giant Solifuge.

I appreciate the comments.

I took Gigapede and Giant Solifuge out because they were very limited. Giant Solifuge just doesn't have enough power most of the time and Gigapede doesn't have trample, which makes him easy to block.

I took out Shocker and Barbed Shocker for not making enough of a difference to try out Swarm of Bloodflies and Mazirek, Kraul Death Priest though. They have been quite excellent. If I wasn't already a fan of Xira Arien I'd have Mazirek be my commander.