Species Details

Abagrotis trigona

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

Common NameLuteous Dart SeasonalityAdults have been collected in Alberta throughout August. IdentificationA medium-size Abagrotis (2.8-3.0 wingspan) with rather stubby red-brown forewings and dull black hindwings. The most prominent marking is the narrow dark bar-shaped reniform, in many specimens accompanied by a dark but less developed orbicular spot. The doubled antemedian and postmedian lines are usually indicated by a series of fine dots, and dark scales are peppered over the remainder of the wing. The fringe on both wings is red-brown. Males can also be separated from other Abagrotis sp. by the cylindrical apex of the valves, the sharp pointed apex of the uncus and the bead-like antennae. Females of trigona do not have the dorso-ventrally flattened abdomen found in females of other Alberta Abagrotis, and are also the only species lacking a signum on the bursa. See also the superficially similar Abagrotis cupida and A. placida.

Scientific Name Abagrotis trigona Common Name Luteous Dart Habitat Dry shrub and wooded areas, in particular along the valleys in the arid grassland region of Alberta. Seasonality Adults have been collected in Alberta throughout August. Identification
A medium-size Abagrotis (2.8-3.0 wingspan) with rather stubby red-brown forewings and dull black hindwings. The most prominent marking is the narrow dark bar-shaped reniform, in many specimens accompanied by a dark…
A medium-size Abagrotis (2.8-3.0 wingspan) with rather stubby red-brown forewings and dull black hindwings. The most prominent marking is the narrow dark bar-shaped reniform, in many specimens accompanied by a dark but less developed orbicular spot. The doubled antemedian and postmedian lines are usually indicated by a series of fine dots, and dark scales are peppered over the remainder of the wing. The fringe on both wings is red-brown. Males can also be separated from other Abagrotis sp. by the cylindrical apex of the valves, the sharp pointed apex of the uncus and the bead-like antennae. Females of trigona do not have the dorso-ventrally flattened abdomen found in females of other Alberta Abagrotis, and are also the only species lacking a signum on the bursa. See also the superficially similar Abagrotis cupida and A. placida.
Life History Abagrotis trigona is single brooded, and adults are attracted to both sugar baits and light. The larva has been described by Crumb (1956). Conservation A fairly common and widespread species; no concerns. Diet Info No Alberta data; elsewhere the only reported larval host is willow (Salix sp.) (Crumb, 1956) Range
Western South Dakota and southwestern Manitoba west across southern Saskatchewan and Alberta to Vancouver Island, south to the Mexican border. There is also a disjunct population in Ohio. In Alberta trigona has been…
Western South Dakota and southwestern Manitoba west across southern Saskatchewan and Alberta to Vancouver Island, south to the Mexican border. There is also a disjunct population in Ohio. In Alberta trigona has been collected in the grassland valleys and foothills north to about Red Deer.

Citation

Page Citation for Abagrotis trigona

Page Citation

"Abagrotis trigona, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4262. Accessed 29 Nov. 2021.

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Lepidoptera Suborder Ditrysia Superfamily Noctuoidea Family Noctuidae Subfamily Noctuinae Genus Abagrotis Species Abagrotis trigona
This hierarchy is created from our museum records, it may not always accurately reflect modern taxonomies.

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum