Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Dahlica triquetrella - Hodges#0436

Tremors... - Dahlica triquetrella Dahlica bagworm moth - Dahlica triquetrella micro moth with unusual pupa casing - Dahlica triquetrella Bag worm - Dahlica triquetrella Bag worm - Dahlica triquetrella Casebearer case with debris - Dahlica triquetrella Dahlica triquetrella - female Bagworm Moth caterpillar - Dahlica triquetrella
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Tineoidea (Tubeworm, Bagworm, and Clothes Moths)
Family Psychidae (Bagworm Moths)
Subfamily Naryciinae
Genus Dahlica
Species triquetrella (Dahlica triquetrella - Hodges#0436)
Hodges Number
Other Common Names
Bagworm applies to all members of Psychidae.
Synonyms and other taxonomic changes
Dahlica triquetrella (Hübner, 1812)
Solenobia triquetrella
* phylogenetic sequence #013075
Wingspan 9-13 mm, females wingless.
There are records from the Great Lakes region, southeastern Canada and the northeast United States. (1)
Lichens, although they are said to require insects in their diet in order to mature.
Life Cycle
North American population is parthenogenic (females reproducing by laying viable eggs not fertilized by a male). Eggs are layed in discarded bag in early spring soon after adult emerges from pupa and bag. Adult lives only a few days and does not eat. Caterpillars eat and grow till fall, then find a place (often seen on the sides of buildings) to spend the winter without pupating. In very early spring, as temperatures rise to a degree or two above freezing, the caterpillar pupates.
Caterpillars attach a variety of objects to their silken bags, including dead plant parts, dead animal parts, or grains of sand.