Formosa Carpet Moth Dysstroma formosa (Hulst, 1896)

Family: Geometridae

Subfamily: Lymantriinae

Identification: dult [gray form]: forewing pale brownish-gray with darker gray median area; basal area with fairly straight dark gray band beginning at inner margin and stopping short of the costa (the band is diffuse and does not extend to the AM line); AM and PM lines jagged, irregular; short black streak in median area is slightly closer to PM line than AM line; ST line broken in middle and consisting of a series of arcs filled with gray or brown; short black diagonal streak at apex Adult [orange form]: as above, except median area mostly brownish-orange, dark gray band in basal area edged with orange distally, and PM line with deep V-shaped cleft near costa There is also an intermediate form with a gray median area but brownish basal and subterminal areas; hindwing of all forms uniformly-colored but varying from pale yellowish-gray to almost white

Wing Span: 2.4-3.1 cm

Life History:

Flight: midsummer

Caterpillar Hosts: leaves of currant and gooseberry (Ribes spp.)

Adult Food:

Habitat:

Range: In Canada, reported from Newfoundland and New Brunswick in the east, and Saskatchwan to BC and Yukon in the west. Presumably occurs in adjacent areas of United States, including Alaska [records from the web come from New York, Utah, and California].

Conservation:

NCGR:

Management Needs:

Taxonomy Notes: None.

Get your BAMONA Gear!

Visit the BAMONA Shop

Hoodies and t-shirts in two designs!

Please donate!

We depend on donations to keep Butterflies and Moths of North America freely available. We want to express our gratitude to all who showed their support by making a contribution this year. You can donate to support this project at any time.

Advertise with us!

Do you have a product or service that you think would interest BAMONA users? If you would like to advertise on this website, contact us by email, or use the contact form and select the "Advertising" category.