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 Anthocharis cethura Desert Orangetip

Apex of male forewing black and white checkered; female with dark apical portion of forewing equal to or large than orange patch and without a light patch between it and the apex of the wing.

 Anthocharis julia Southern Rocky Mountain Orangetip

The four species julia, sara, stella, and thoosa are most easily separated by their largely disjunct ranges. Compare the distribution maps in the species accounts.

Black discal spot (bar) not connected with black edging at lower edge of orange apical patch.

 Anthocharis sara Pacific Orangetip

The four species julia, sara, stella, and thoosa are most easily separated by their largely disjunct ranges. Compare the distribution maps in the species accounts.

 Anthocharis stella Stella Orangetip

The four species julia, sara, stella, and thoosa are most easily separated by their largely disjunct ranges. Compare the distribution maps in the species accounts.

Female is pale yellow; black discal spot narrow in male and not connected with black edging at the lower margin of the orange apical patch.

 Anthocharis thoosa Southwestern Orangetip

The four species julia, sara, stella, and thoosa are most easily separated by their largely disjunct ranges. Compare the distribution maps in the species accounts.

Discal spot larger and wider than in other three species

  Euchloe ausonides Large Marble

Discal dot of forewing above larger than in creusa; forewing discal dot contains scattered white scales unlike hyantis and lotta; generally larger than other species in genus.

 Euchloe creusa Northern Marble

Discal spot of forewing above small; mottling of hindwing below dark olive, not yellow-green.

 Euchloe guaymasensis Sonoran Marble

Sonora, Mexico and southeastern United States; forewing pale yellow, not white as in lotta; spaces between marbling of hindwing below not pearly or reflective as in lotta.

 Euchloe hyantis California Marble

California distribution not overlapping range of lotta; discal spot of forewing above without scattered white scales as in ausonides.

 Euchloe lotta Desert Marble

Distribution not overlapping that of hyantis; discal spot of forewing above without scattered white scales as in ausonides.

 Pontia occidentalis Western White

Very difficult to separate from protodice. P. occidentalis does not occur in the east; gray chevrons of upper margin of male forewing lighter and contrasting with postmedial band; female forewing postmedial band more connected than in protodice; forewing apex and hindwing veins more strongly accented with gray-green than in protodice.

 Pontia protodice Checkered White

Very difficult to separate from occidentalis. P. protodice is the only species in the east; gray chevrons of upper margin of male forewing not lighter and not contrasting with postmedial band; female forewing postmedial band less connected than in occidentalis; forewing apex and hindwing veins less strongly accented with gray-green than in occidentalis.