Technical Abstract: Spiranthes diluvialis, Ute ladies' tresses, is a rare, riparian orchid endemic to Utah, Colorado, Wyoming, Idaho, and Montana. It is listed as threatened under the Endangered Species Act. Reproduction by this species is variable from population to population. While most populations show over 60% fruit set, one, at Brown's Park, Utah, is consistently below 30%, and sometimes as low as 3%. The reason for this very low fruit and seed production appears to be related to the paucity of pollinators at the Brown's Park site. In particular, a twig-nesting species of native bee, Anthophora terminalis, seems to be completely absent at Brown's Park though it is frequently abundant, and an important pollinator, at other more successful populations. Over the past two years we have been trying to obtain immature individuals of this bee in their nests, and transplant them to Brown's Park. We are beginning to see signs of success. We have made several successful transplants and the transplanted bees have emerged and nested successfully, though in small numbers. We are optimistic about future efforts.