Wing span: 1 5/16 - 1 3/4 inches (3.4 - 4.5 cm).

Identification: Forewing is narrow and pointed, hindwing is somewhat triangular. Upperside of wing is black; forewing has a dull brown patch at the end of the cell. Hindwing has white fringe on the outer margin. Male has a costal fold containing yellow scent scales; female has a patch of scent scales on the 7th abdominal segment.

Life history: Eggs are laid singly under host plant leaves. Caterpillars feed on leaves and rest in shelters of rolled or tied leaves. Caterpillars from the last brood hibernate.

Flight: Three broods from March-December.

Caterpillar hosts: Various legumes including New Mexican locust (Robinia neomexicana), bur clover (Medicago hispida), deerweed (Lotus scoparius), desert ironwood (Olneya tesota), and vetch (Vicia species).

Adult food: Flower nectar.

Habitat: Deserts, warm or arid lowlands, roadsides.

Range: Southern California, Arizona, New Mexico, and Texas south to Argentina. Strays north to northern Illinois, northeast Nebraska, central Colorado, southern Nevada, and central California.