Species Trigrammia quadrinotaria - Four-spotted Angle - Hodges#6360

6360

formerly Semiothisa quadrinotaria; also listed as Digrammia quadrinotaria on some web sites

the only species in this genus in North America

wingspan about 22 mm, based on Jim Vargo photo at MPG

Adult: wings white or very pale brown with brown speckling; lines dark brown, sometimes conspicuously edged with yellow; forewing AM line slightly wavy, sometimes faint; median line straight, heavy; PM line slightly S-curved; dark brown spot (sometimes two) near middle of subterminal area close to PM line; hindwing similarly colored but has discal spot and lacks AM line; spot in subterminal area may be lacking; shallow point midway along outer margin

eastern United States: Pennsylvania and Maryland to Florida, west to Texas, north to Illinois and Ohio

deciduous woodlands

adults fly from April to July

larvae presumably feed on leaves of buckeye (Aesculus spp.)

This species was placed in genus Trigrammia by Malcolm Scoble et al in the 1999 catalog Geometrid Moths of the World.

Digrammia eremiata has darker wings and lacks subterminal spot(s) on forewing; D. respersata and teucaria have darker brown wings, lack noticeable lines on hindwing, and have a western distribution

see pinned adult images of these and related species by Jim Vargo at MPG

a photo by James Adams of a similar-looking undescribed species from North Carolina has 4 lines on the forewing (not 3), and 3 lines on the hindwing (not 2)

Scoble, Malcolm J. et al. 1999. Geometrid Moths of the World - A Catalogue. 1,312 pp. CSIRO Publishing.

Moth Photographers Group - species page with photos of living and pinned adults.

pinned adult image plus status in Maryland (Larry Line, Maryland)

pinned adult image (James Adams, Dalton State College, Georgia)

flight season and habitat plus common name reference and status in Ohio (Ohio State U.)

presence in Florida; list (John Heppner, Florida State Collection of Arthropods)

presence in Illinois; list (Rickard Toomey, Illinois State Museum)

classification in genus Trigrammia (Brian Pitkin et al, Butterflies and Moths of the World)

species synonyms (Markku Savela, FUNET)