These galls are on the native shrub, Ninebark. Thanks to John Plakidas from Bug Guide, I now know that they are made by a gall midge (Cecidomyiidae) in the Genus Contarinia, but the species is, apparently, as yet unknown. John Plakidas said that "The galls occur in mid-May here and the orange larvae drop to the soil, spin a cocoon, where they remain dormant until the next spring, one generation a year. So this species lives about 11 months out of a year as a larva. How amazing is that! These galls are so rare they are not in Gagne's red book, Gall midges of North America."