Extracted from: Timberlake P. H., (1960). A Revisional Study of the Bees of the Genus Perdita F. Smith, with Special Reference to the Fauna of the Pacific Coast. (Hymenoptera, Apoidea). Part IV. University of California Publications in Entomology Editors Volume 17, No. 1, pp. 1-156, plates 1-17.|
This is a small yellow species, flying in the fall months at flowers of Aplopappus (Isocoma) heterophyllus, Ghitierrezia sarothrae, and other Compositae from the eastern border of Arizona to Sioux County, Nebraska. It is distinguished from other small yellow species by the moderately shining aspect, the comparatively elongate facial foveae, the almost perfectly nude mesonotum, and the clear and not much whitened wings.