Lepidoptera of North America 15. Butterflies of southern California in 2018: updating Emmel and Emmel's 1973 Butterflies of southern California
It has now been more than 44 years since Thomas C. Emmel and John F. Emmel's The Butterflies of Southern California was published on November 30, 1973. The Emmels' provided a history of previous leaders in gathering information on the fauna of southern California butterflies, information on life zones and butterfly habitats and season progression. They also listed areas little visited that needed more field study. They covered 167 species and an additional 64 subspecies or segregates (many of those have since been elevated to species status or removed as segregates for not being all that distinct ...
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Davenport, Ken; Colorado State University. Department of Bioagricultural Sciences and Pest Management; C.P. Gillette Museum of Arthropod Diversity