Ethmia zelleriella

(Chambers, 1878)

Zeller's Ethmia Moth

Ethmia zelleriella is a small in the Ethmiidae (formerly placed in Depressariidae or Coleophoridae) found in eastern North America. are active primarily in spring and early summer, with evidence of a second in some regions. The is associated with oak woodlands and foothill , where larvae feed on Phacelia species (Boraginaceae). The moth has distinctive black-and-white patterned forewings and is one of approximately 50 Ethmia species occurring north of Mexico.

Pronunciation

How to pronounce Ethmia zelleriella: /ˈɛθ.mi.a ˌzɛl.ɛˈriː.ɛl.la/

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Identification

Distinguished from other Ethmia by the specific arrangement and shape of black spots on the forewings. Most Ethmia species are extremely similar in appearance, requiring examination of genitalia or plant association for definitive identification. The combination of white forewings with evenly distributed elongated black spots, pale brownish hindwing area, and spring-early summer period in eastern North America helps separate it from western and southwestern . Upturned palps (mouthparts projecting forward like small horns between ) distinguish Ethmiidae from superficially similar tortricid leafroller moths.

Appearance

Forewings 10.4–12 mm in length. Ground color of forewings white, dusted with gray along the to the midcell. Series of elongated black spots distributed more or less evenly over the wing surface. Hindwings white basally, becoming pale brownish in the area. Overall coloration black, white, and gray in typical Ethmia pattern.

Habitat

Oak woodlands and foothill . Associated with areas supporting larval plants in the Phacelia. occasionally attracted to blacklights in open habitats including high plains, though more abundant in woodland settings.

Distribution

Eastern North America: southern Ontario and Quebec south through the Ohio Valley and southern Appalachian regions to central Texas.

Seasonality

on wing April–June in Ohio and Maryland; May–July in Indiana; late April and early August in Tennessee; August in North Carolina. Two per year probable.

Diet

Larvae feed on Phacelia dubia and Phacelia bipinnatifida (Boraginaceae). Feeding occurs freely without web construction.

Host Associations

Phacelia dubia - larval food plant
Phacelia bipinnatifida - larval food plant

Life Cycle

Larvae feed externally on plant foliage without constructing webs. occurs in pieces of corky bark (e.g., Ulmus racemosa) into which larvae bore.

Behavior

attracted to light. Larvae bore into corky bark to pupate.

Similar Taxa

Ethmia discostrigellaSimilar black-and-white patterning; distinguished by spot arrangement and plant (Mountain Mahogany, Cercocarpus montanus)
Other Ethmia speciesNearly identical wing patterns; most require genitalia dissection or geographic/seasonal data for separation

More Details

Taxonomic history

The Ethmia has undergone repeated -level reclassification. Formerly placed in Coleophoridae, then Depressariidae, now generally treated as family Ethmiidae within Gelechioidea. This reflects ongoing uncertainty in gelechioid .

Etymology

Specific epithet zelleriella honors Philipp Christoph Zeller (1808–1883), German entomologist who described numerous Lepidoptera.