Characters, distribution, and food plants of leafhopper vectors of virus causing Pierce's disease of grapevines

Distinguishing characters, especially genitalia, are given for the following vectors: Helochera delta Oman Carneocephala fulgida Nottingham Draeculacephala minerva Ball Neokolla circellata (Baker) Neokolla confluens var. pacifica n. var. Neokolla severini DeLong Pagaronia confusa Oman Pagaronia 13-punctata Ball Pagaronia triunata Ball Priscenus friscanus (Ball) Differences in genitalia distinguish Neokolla confluens var. pacifica from N. confluens. All ten vectors occur in California; several of them have been reported only from this state. The usual food plants of most of them are grasses, though some have been collected on Vinca spp., some on various weeds, and Neokolla circellata on grapevine and other woody plants.