Recently, I came across a great resource for biology teachers and naturalists that teach some aspect of entomology: BugGuide. This site represents some of the best of the collaborative nature of the Web. The site is a rich resource. If you can’t find your information–just post an image or leave a question–someone will probably get back to you. For instance I found that the galls on sumac that I had found were caused by aphids. The site had images and a number of resources about the sumac galls.
Today, Nuthatch, who blogs at Bootstrap Analysis about such things described her efforts to survey her yard for various insects. She posted the following image at BugGuide:
She found out that her wasp is an undescribed species. You can read her account here.