Psychidae

Pohl, Greg, Anweiler, Gary, Schmidt, Christian & Kondla, Norbert, 2010, An annotated list of the Lepidoptera of Alberta, Canada, ZooKeys 38 (38), pp. 1-549 : 57

13. Psychidae – bagworm moths

Males are minute to small (8–25 mm wingspan) moths with drab brown wings; most females are wingless, and many resemble larvae. Larvae construct cases of plant matter and debris, in which they move about while feeding. Most species feed on plants, but at least one genus ( Dahlica ) feeds on lichens and debris. Parthenogenesis has developed in a few genera, including Dahlica .

Approximately 1000 species of psychids are known worldwide. They occur throughout the world, but most species are restricted to the Palearctic. Twenty-seven species are known from North America, four of which are reported from AB. Davis (1964) treated all of the known North American species, with the exception of two recently introduced species in the genus Dahlica .