Synonyms and other taxonomic changes
Caenurgina erechtea (Cramer, )
Cramer,  (2)
* phylogenetic sequence #930924
Wingspan 30-42 mm; female larger than male. (1)
Forewing length 14-23 mm. (3)
The following loosely applies to the 2 mentioned species. There is just too much variability for these descriptions to be valid much of the time.
Adult: two dark bands on each forewing do not touch each other near the midline, and the inner (or more basal) band does not touch the inner margin [whereas in C. crassiuscula, the bands almost touch each other near the midline, and the inner (or more basal) band touches the inner margin.
This is a dissected, male C. erechtea Note the mouse gray color and the AM dark area that does NOT touch the inner margin of the FW.
Scales brushed from terminal end of abdomen in males of C. erechtea and C. crassiuscula
Absent from the following parts of Canada where C. crassiuscula occurs: Newfoundland, New Brunswick, Prince Edward Island, Yukon, Northwest Territories.
Otherwise, occurs coast to coast in United States and adjacent parts of Canada.
Fields, roadsides, waste places; adults are active day and night, and are attracted to light.
Adults fly from March to November.
Larvae feed on alfalfa, clover, grasses, and Great Ragweed
Due to the similarity in spelling, the genus Caenurgina
is sometimes confused with Caenurgia
, a genus in the same subfamily and tribe as Caenurgina
) has two dark bands on each forewing that almost touch each other near the midline, and the inner (or more basal) band touches the inner margin (compare images
of both species at CBIF).