| Moths of North Dakota |
Noctuoidea Notodontidae: Nystaleinae |
Symmerista canicosta Franclemont 1946
| Common name: Red-humped oakworm Hodges #: 7952 Identification: Rfw 18.8 mm, with a pale streak from discal cell to apex; streak with white tooth just distad of reniform about as wide as high; s.t. line appears as a series of sinuate black marks in each cell.. Scape of antennae with long scale tuft, palpi prorect, longer than height of eye. Male with emargination of eighth sternite wider than deep. Similar species: 7951, 7953, 7983, 8005. Distribution: southern Canada and temperate United States east of the Great Plains. Hosts: Larval feed on Oaks- Quercus. Note: Prior to
1946, S. canicosta, S. leucitys and S. albifrons were
thought to be a single species going under the latter name. See
the Key to
Notodontidae of the Dakotas for separation of these three species.
The true S. albifrons does not occur in the Dakotas. |
 MN. Becker Co., 30- VI- 1961. R. Poole.
Head of S. canicosta showing tuft of scales on antennal scape.
Larva, pic courtesy of A. Steven Munson, USDA Forest Service, Forestry Images, Bugworld.org
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Forewings of S. canicosta (left) and S. leucitys (right): comparison of markings.
Ventral abdomen f S. canicosta showing emargination (pink cross) of eighth sternite (blue arrow) wider than deep and with rounded mesal lobes (green arrows).
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