There are a number of species of praying mantises in Michigan, some native and some introduced. I don't really know them apart, but based on its size, I think this one may be a Chinese mantis (Tenodera aridifolia sinensis). Praying Mantises are famous for cannibalism after sex, but that doesn't seem to be strictly true. This one blended well with the prairie grasses at WMU's Asylum Lake Preserve.
I teach economics at Kalamazoo College. My wife is also an economist. We were on sabbatical in Europe for the 2014-15 academic year. (Salamanca, Spain, followed by Oxford, UK.) We were in Uruguay for the 2006-7 academic year.