A new species of Eulithis Hubner (Lepidoptera : Geometridae) from California

A new geometrid moth, Eulithis powellata, of the subfamily Larentiinae, is described from Monterey County, California. It is most similar to the Eurasian Eulithis mellinata (Fabricius) and E. pyraliata (Denis and Schiffermuller), and its larva feeds on Ribes menziesii (Pursh) (Saxifragaceae). Although one of its Old World relatives, E. mellinata, has been introduced into eastern Canada, E. powellata is clearly distinct and apparently endemic to a small area of coastal California. Sixteen species of Eulithis are now known from North America, including two Eurasian introductions.