California Threatened and Endangered Insects

The following species accounts provide some information about the life histories of some of California’s most threatened insects. Many insects in California are suspected to be in jeopardy but have not yet received formal protection under the Endangered Species Act. Information on the folowing insects may be found by clicking on the images below.

Zayante Band-Winged Grasshopper Trimerotropis infantilis	Delhi Sands Flower-Loving Fly Rhaphiomidas terminatus abdominalis	Mount Hermon June Beetle Polyphylla barbata	Delta Green Ground Beetle Elaphrus viridis
Valley Elderberry Longhorn Beetle Desmocerus californicus dimorphus	Laguna Mountains Skipper Pyrgus ruralis lagunae	Bay Checkerspot Butterfly Euphydryas editha bayensis	Quino Checkerspot Butterfly Euphydryas editha quino
Oregon Silverspot Butterfly Speyeria zerene hippolyta	Callippe Silverspot Butterfly Speyeria callippe callippe	Myrtle’s Silverspot Butterfly Speyeria zerene myrtleae	Berhen’s Silverspot Butterfly Speyeria zerene behrensii
Mission Blue Butterfly Icaricia icarioides missionensis	Lotis Blue Butterfly Plebejus anna lotis	Smith’s Blue Butterfly Euphilotes enoptes smithi	El Segundo Blue Butterfly Euphilotes bernardino allyni
Palos Verdes Blue Butterfly Glaucopsyche lygdamus palosverdesensis	San Bruno Elfin Butterfly Callophrys mossii bayensis	Lange’s Metalmark Butterfly Apodemia mormo langei	Kern Primrose Sphinx Moth Euproserpinus euterpe

This site was originally developed in 1997 by Michael Caterino, during his tenure as an Entomology graduate student at UC Berkeley.