Synonyms and other taxonomic changes
Arphia behrensi Saussure, 1884. Type locality: Napa Soda Spring, California
Arphia koebelei Bruner, 1905. Type locality: San Mateo County, California
Arphia conspersa behrensi (Saussure) Strohecker, Middlekauff & Rentz. 1968
Adults in spring and early summer, some may live longer. Hind wings yellow with dark margin. Fastigium relatively broad, except very narrow toward front where it meets frontal costa. Hind tibiae blue (at least partly).
Nearly identical to A. sulphurea, but found on the west coast from the Bay area in California to southern Oregon (A. sulphurea is eastern).
A. ramona is found mostly further south, is somewhat larger, has hind wings almost always orange with dark band narrower, often interrputed near base of spur, and with narrower spur. It is not unlikely that A. ramona & A. behrensi are actually northern and southern variants of a single species.
Lactista gibbosus occurs further south, averages a little smaller, and has fastigium even narrower.
Also very similar and closely related to A. conspersa, which replaces it eastward in drier areas east of the Sierras. That species has varied wing color, most often red to orange or pink where it approaches the distribution of A. behrensi) and wider front of fastigium.
A. saussureana has adults in summer and autumn, hind wings usually deep orange to red with wider dark border, and also a wide front of fastigium.
California west from the Sierra Nevada and north from roughly the Bay Area.
Nymphs overwinter with adults primarily in late winter and spring.