Euchloe hyantis hyantis

'California' Pearly Marble

The hyantis/lotta group of butterflies is a difficult group, and it doesn't help that every population is a little different (acc. to Paul Opler, Western Butterflies, who has studied this group extensively). There may be three or more species involved (possibly with three species in the San Bernardinos alone - andrewsi, lotta, and hyantis). Ken Davenport has written that both hyantis and lotta fly at Bald Mountain, where my photograph was taken; that the population of hyantis there is heavily marbled; that field marks don't hold true for these butterflies on the Kern Plateau (the thickness of the forewing black bar, for instance); and he mentions "intermediacy" between many individuals in the two species. When I visited Bald Mountain on June 28, 2017, this was just one day before Ken's latest date for any lotta in California, while hyantis may fly well into July. For more, see the page for E. hyantis lotta.

Pearly Marble - Euchloe hyantis hyantis
This Euchloe hyantis hyantis was hilltopping at the summit of Bald Mountain, which is accessed from Sherman Pass Road in the southern Sierras. June 28, 2017.
Pearly White - Euchloe hyantis near lotta
This population of Euchloe hyantis, which the Emmels called "near lotta" in their 1973 book on So. Cal. Butterflies, was found near Arrastre Creek near Big Bear. April 25, 2008.
Pearly White - Euchloe hyantis near lotta
Euchloe hyantis from Arrastre Creek area. April 25, 2008.
Tansy Mustard - Descurainia
Tansy mustard (Descurainia sp.), on which this female was ovipositing.

©Dennis Walker