Pyrausta lethalis
Grote, 1881
Lethal Pyrausta, lethal pyrausta moth
Pyrausta lethalis is a small crambid described by Grote in 1881. It occurs in arid and semi-arid regions of the southwestern United States and adjacent Mexico. The is characterized by distinctive purplish-brown forewings with contrasting pale subterminal areas. are active across much of the year, with records spanning March through October.
Pronunciation
How to pronounce Pyrausta lethalis: //pɪˈraʊstə ləˈθælɪs//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from similar Pyrausta by combination of small size, purplish-brown forewing ground color with well-defined dark exterior line, and pale whitish-shaded subterminal area. The black terminal line on pale fuscous hindwings provides additional diagnostic feature. Separation from P. signatalis and other requires examination of genitalia or detailed wing pattern analysis.
Images
Appearance
Small with wingspan approximately 16 mm. Forewings purplish brown with dark brown exterior line; subterminal area pale brown, shaded with whitish. Hindwings pale fuscous with black terminal line. Overall coloration muted with subtle pattern contrast between darker basal and paler wing areas.
Habitat
Arid and semi-arid environments including desert scrub, desert grassland, and dryland transitional zones. Associated with Mojave Desert and Chihuahuan Desert biotic provinces.
Distribution
Southwestern North America: California (Mojave Desert, Los Angeles area), southern Nevada, southern Arizona, and Texas (Big Bend region).
Seasonality
active March through October, suggesting multivoltine or extended period with possible overlapping .
Similar Taxa
- Pyrausta signatalisSimilar size and general appearance; distinguished by raspberry pyrausta having different wing pattern with more prominent markings and association with Monarda plants in eastern North America versus arid southwestern distribution of P. lethalis
More Details
Nomenclature
Originally described as Botis lethalis by Grote in 1881; later transferred to Pyrausta.