Dyspteris

Dyspteris is a genus of moths in the family Geometridae and was erected by Jacob Hübner in 1818. It is monotypic, being represented by a single species, Dyspteris abortivaria, commonly known as the bad-wing. This species was first described by Gottlieb August Wilhelm Herrich-Schäffer in 1855 and is found in North America.^{[1][2][3][4][5]}

Dyspteris abortivaria
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Geometridae
Genus:	Dyspteris Hübner, 1818
Species:	D. abortivaria
Binomial name
Dyspteris abortivaria (Herrich-Schaffer, 1855)

It is called "bad-wing" because its forewing is much larger than its hindwing, making it often difficult to pull into position for spreading.^[6]

The bad-wing, Dyspteris abortivaria