Other Common Names
Milkweed Tiger Moth, Milkweed Tussock Caterpillar (larva), Harlequin Caterpillar (larva)
Synonyms and other taxonomic changes
Euchaetes egle (Drury, 1773)
* phylogenetic sequence #930412
Explanation of Names
Author of species is
Drury 1773, as
Phalaena egle, presumably. The origin of the species name is not clear.
Egle is a character in a Lithuanian folk tale, but it is also a surname. (Based on Internet searches.)
Identification
Wings usually unmarked gray, abdomen yellow with black spots.
Range
eastern half of US plus Quebec and Ontario
Habitat
Fields, edges, etc. with host plant
Season
Adult: May-September (two flights in much of range). Caterpillars found starting in June
(2).
Food
Larvae feed on milkweeds (Asclepias spp.) and also dogbane (Apocynum spp.)
Life Cycle
Adults sometimes found on hostplant during day
(1). Females lay eggs in "rafts" and caterpillars are gregarious during instars 1-3, solitary in later instars, when marked with bright tufts. May defoliate patches of milkweed
(2) (3).
Life cycle images:
1.early instar larvae 2.larvae 3.late instar larva 4.cocoon 5.adult
Print References
Covell, p. 74, plate 12 #17
(1)
Wagner, p. 474--photos of larva and adult
(2)
Lafontaine J. D., and B. C. Schmidt 2010. Annotated check list of the Noctuoidea (Insecta, Lepidoptera) of North America North of Mexico.
(4)
Internet References
Moth Photographers Group - range map, photos of living and pinned adults.
BOLD - Barcode of Life Data Systems - species account with collection map and photos of pinned adults.