Prolita variabilis

(Busck, 1903)

Prolita variabilis is a gelechiid described by August Busck in 1903. It is distributed across western and central North America, with records from California to Saskatchewan. The exhibits distinctive wing patterning with conspicuous black longitudinal lines on the forewings. Larvae feed on Ericameria linearifolia, a shrub in the Asteraceae .

Pronunciation

How to pronounce Prolita variabilis: /prəˈlaɪtə vəˈraɪəbɪlɪs/

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Identification

The three short, pronounced heavy black longitudinal lines on the forewings are diagnostic and modified but present in all varieties of this . The pattern of -following lines that intensify toward the apex, combined with the specific placement of the three bold lines ( base, fold, and middle/costal), distinguishes P. variabilis from other Prolita species and similar gelechiids. The yellowish fuscous hindwings contrast with the patterned forewings.

Appearance

have a wingspan of 22–27 mm. Forewings are light greyish yellow, slightly brownish toward the tip. Three heavy black longitudinal lines are highly conspicuous: the first and shortest at the base just within the margin; the second on the fold, reaching characteristic thickness outside the first line and ending as a heavy line just before the middle of the wing; the third midway between the fold and costal edge, beginning at the middle of the wing and reaching to the end of the . These three lines are continued as fainter lines from base to apex. Additional blackish brown longitudinal lines follow the , becoming heavier and more blackish toward the apex. Hindwings are yellowish fuscous.

Habitat

Associated with supporting its larval plant Ericameria linearifolia, which grows in dry, open areas including chaparral, coastal sage scrub, and pinyon-juniper woodlands. records span diverse elevations from coastal California to montane regions in Colorado and Montana.

Distribution

North America: recorded from California, Colorado, Arizona, Connecticut, Massachusetts, Montana, Nevada, New Mexico, Washington, British Columbia, Manitoba, and Saskatchewan. The shows a broad transcontinental range with concentration in western regions.

Diet

Larvae feed on Ericameria linearifolia (Asteraceae). feeding habits are not documented.

Host Associations

Ericameria linearifolia - larval food plantAsteraceae shrub; larval feeding has been reported on this

Similar Taxa

Other Prolita speciesShare Gelechiidae and general body plan, but P. variabilis is distinguished by the specific pattern of three bold black forewing lines and their consistent presence across varieties

More Details

Taxonomic history

Originally described as Gelechia variabilis by August Busck in 1903, later transferred to Prolita. The specific epithet 'variabilis' refers to the variable expression of the wing pattern lines while maintaining the diagnostic three bold longitudinal markings.