I unfortunately forget which of you asked about a burrowing bee they saw in their yard, but did it perhaps look like one of these?
Photo by Jenny Thynne Because that's a Scoliid wasp, of the genus Psuedotrielis. There's also Campsomeris, and Radumeris, in the same family, and they do indeed look quite bee-like at first glance. There was one in my front yard on Thursday, searching for burrowing beetle grubs to dig down to and parasitise