Species Details

Macaria bitactata

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

Common NameShort-lined Granite SeasonalityFlies in July and August, peaking in mid July. IdentificationA grey geometrid with bold, black transverse lines on the forewing; the four dark costal wedges typical of the genus continue as AM, PM and median lines, the median line broadest and incorporating the discal spot. AM and PM line sometimes broken. Hindwing slightly paler, speckled grey with a faint (sometimes absent) PM line and discal spot, slightly darker marginal area. Sexes not dimorphic. Similar to M. decorata, which has a speckled, not uniform grey, forewing ground colour, and lacks the thickened median line. Members of the genus Digrammia have a dark patch midway down the forewing submarginal area, absent in M. bitactata.

Scientific Name Macaria bitactata Common Name Short-lined Granite Habitat Moist open woods and shrubby areas. Seasonality Flies in July and August, peaking in mid July. Identification
A grey geometrid with bold, black transverse lines on the forewing; the four dark costal wedges typical of the genus continue as AM, PM and median lines, the median line broadest and incorporating the discal spot. AM…
A grey geometrid with bold, black transverse lines on the forewing; the four dark costal wedges typical of the genus continue as AM, PM and median lines, the median line broadest and incorporating the discal spot. AM and PM line sometimes broken. Hindwing slightly paler, speckled grey with a faint (sometimes absent) PM line and discal spot, slightly darker marginal area. Sexes not dimorphic. Similar to M. decorata, which has a speckled, not uniform grey, forewing ground colour, and lacks the thickened median line. Members of the genus Digrammia have a dark patch midway down the forewing submarginal area, absent in M. bitactata.
Life History The immature stages are detailed by McGuffin (1972). Adults come to light. Conservation No obvious concerns. Diet Info Larvae feed on alder (Alnus sp.) and gooseberry (Ribes sp.) (Prentice 1963). Range Newfoundland west to the Yukon and B.C., south to California (McGuffin 1972).

Citation

Page Citation for Macaria bitactata

Page Citation

"Macaria bitactata, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-3881. Accessed 19 Sep. 2021.

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Lepidoptera Suborder Ditrysia Superfamily Geometroidea Family Geometridae Subfamily Ennominae Tribe Semiothisini Genus Macaria Species Macaria bitactata
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