Lambdina fiscellaria, the mournful thorn or hemlock looper, is a moth of the family Geometridae. It is found in North America, from the Pacific to the Atlantic coast and from Canada south to Pennsylvania, Wisconsin and California.
|Bon Echo Provincial Park, Ontario|
3, see text
The adult is grey to cream coloured with scalloped wing borders and resembles the oak besma. Darker line across fore and hind wings, a second line across fore wings. Area between lines may be shaded or unshaded.
There are three recognised subspecies:
- Lambdina fiscellaria fiscellaria – eastern hemlock looper
- Lambdina fiscellaria lugubrosa – western hemlock looper
- Lambdina fiscellaria somniaria – western oak looper or Garry oak looper
- Sogaard, Jim. (2009) Moths and Caterpillar of the North Woods. Duluth, MN:Kollath+Stensaas, p.53.