Our always vigilant cat noticed this tiny wasp (6mm in length) on a rug in our kitchen. I believe it belongs somewhere among the Aphid Wasps (Pemphredoninae). The wing venation, the single submarginal cell, is a little curious and doesn’t match any of the illustrations in Bohart and Menke (1976), so I haven’t been able to proceed much farther than the subfamily.
Finding an aphid-hunting wasp in the house in March in Minnesota raises some questions, especially with the snow still piled deeply outside. Being a cavity nester, it could have emerged from some of the stems and galls I have sitting out in my office. That’s one possibility. But, given the porosity of the walls and foundations of this old house, the avenues for a creature this size to enter into our living space are many and, having not seen a living wasp of any kind for quite a number of months, most welcome.