Ethmia monticola

(Walsingham, 1880)

Gray Ethmia Moth

Ethmia monticola, the gray ethmia , is a small moth in the Depressariidae found across western North America. are active from May to July and are characterized by their slate gray with conspicuous black markings. The exhibits considerable geographic variation across its range, with three recognized occupying distinct regions from the Pacific Northwest to the southern Rocky Mountains and eastern North America.

Ethmia monticola by (c) Doug Macaulay, some rights reserved (CC BY), uploaded by Doug Macaulay. Used under a CC-BY license.

Ethmia monticola emmeli by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Ethmia monticola: /ˈɛθ.mi.ə mɒnˈtɪ.kə.lə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from other Ethmia by the slate gray ground color of and combined with conspicuous black forewing markings. Separation from E. discostrigella and other western Ethmia species requires examination of or detailed comparison of marking patterns. The upturned labial , resembling horns between the , help distinguish Depressariidae from superficially similar .

Images

Appearance

length 10.8–15.3 mm. Forewings pale to dark slate gray ground color with black, conspicuous and variable markings. pale to dark gray. Overall coloration relatively uniform within individuals but variable across .

Habitat

Oak woodlands in foothill regions; dry mixed conifer forest with oaks at higher elevations. Associated with supporting larval plants in the Boraginaceae .

Distribution

North America from British Columbia and Alberta south to California and Arizona, east to North Dakota and Colorado. Three occupy distinct ranges: E. m. monticola in western North America from Alberta through British Columbia, Washington, Montana, Wyoming, Utah, Idaho, and California mountains; E. m. emmeli in the southern Rocky Mountains and adjoining ranges; E. m. fuscipedella in eastern North America from New York, Ontario, and Manitoba south to Kansas and New Mexico.

Seasonality

on from May to July.

Diet

of fuscipedella feed on Lithospermum canescens and Lithospermum gmelini (Boraginaceae). Larval diet of other subspecies not documented.

Host Associations

Lithospermum canescens - larval fuscipedella only
Lithospermum gmelini - larval fuscipedella only

Life Cycle

live in a slight web. Complete details otherwise undocumented.

Behavior

construct slight webs while feeding. attracted to blacklights but reported as rare at light traps on high plains compared to foothill oak woodlands where the is described as abundant.

Ecological Role

Larval on Boraginaceae. Specific ecological role otherwise undocumented.

Human Relevance

No documented economic or medical significance. Occasionally encountered by enthusiasts and researchers.

Similar Taxa

Ethmia discostrigellaSimilar size and appearance; both found in western North America. E. discostrigella reportedly feeds on Mountain Mahogany (Cercocarpus), distinguishing it ecologically.
TortricidaeSuperficially similar resting posture and size. Distinguished by upturned labial in Ethmia (resembling horns between ) versus different palp structure in .

More Details

Taxonomic history

The Ethmia was formerly placed in but is now classified in Depressariidae. This was originally described as Psecadia monticola by Walsingham in 1880.

Subspecies

Three recognized with non-overlapping geographic distributions: monticola (western ), emmeli (southern Rockies), and fuscipedella (eastern). Only fuscipedella has documented larval associations.