Hyles lineata (Fabricius, 1775)

MONA 7894

White-lined Sphinx Moth

Identification

Adults

Hyles lineata is a common sphinx moth that is often observed hovering while feeding at flowers in the evening.  It is a large to very large moth (FW length 29–40 mm) with a diagonal yellow stripe and white veins on the forewing and a pink and black hindwing that flies throughout much of the Pacific Northwest during much of the year.  The forewings are long and narrow with a smooth weakly convex outer margin.  They are dark olive-brown with an ochre line extending diagonally from the posterior wing base to the apex, silver gray terminal area, and prominent creamy white veins and discal spot.  The hindwing is striped deep pink and black.  The head and thorax are similar in color to the forewing ground color longitudinally streaked with white on the head and tegulae.  The abdomen is brown dorsally and pink laterally with a series of black and white stripes dorsolaterally. The antenna is club-like.

This familiar species can be identified by its large size, white veins on the brown and yellow forewing, and the pink and black hindwing.  It is most similar to Hyles gallii which has a similar color pattern but lacks white marks on the thorax and forewing.

Larvae

The larva is polymorphic black, yellow, or green with yellow lateral and subdorsal lines and a caudal horn.  It is illustrated by Powell & Opler (2009).

Habitat

This species is common throughout the Pacific Northwest at all elevations in all types of habitat including urban areas, low elevation grasslands west of the Cascades, high mountain meadows, and desert rangelands east of the Cascades.

Distribution

Pacific Northwest

This species is found everywhere in the Pacific Northwest as far north as southern British Columbia.  Scattered records from further north include Haida Gwaii and in the Peace River region of British Columbia, but does not appear to be a regular resident in much of the rest of the province.

Global

Hyles lineata is found everywhere in the continental United States except northern Maine. Its range extends from southern Canada to the Mexico border elsewhere. It is often abundant in the desert Southwest.

Life History

Larva

This species is a foodplant specialist feeding on a wide variety of Onagraceae.  It particularly favors fireweed (Epilobium spp.) and evening primroses (Oenothera spp.) in the Pacific Northwest.

Adults

Adults are predominantly nocturnal, but also fly during the evening.  The are avid feeders at flowers, especially those with long corollas, and are familiar to many as "hummingbird moths."  This species has a long flight season with records from late spring until late fall.

Economic Importance

The larvae may sometimes damage ornamental members of the evening primrose family in urban flower gardens.

Literature

BugGuide

Moth Photographers Group

Powell & Opler (2009)

Tuttle (2007)