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Digital Guide to Moth Identification

911407.006954Tetracis jubararia Hulst, 1886 – October Thorn Moth

Phil Huntley-Franck
Distribution: Caution: A single range map dot for a Canadian province may represent records without specific location data.
British Columbia to southern California, eastward to central Saskatchewan, southwestern Idaho and western Nevada, from ~ 500-7,400 ft. elev..
and Size:
Mid-August - late November. FWL ~ 17-26 mm.
Larva and
Host Plants:
Many known host plants include Alnus, Betula, Cornus, Populus, Ribes, Alder, Picea.
Genitalia: See Ferris & Schmidt (2010).
Similar Species:
  • Separate from T. mosesiana in California coastal counties by genitalia and DNA. Elsewhere the absence of pale shading beyond the pm. line distinguishes this species from T. pallulata.
  • Pinned specimens of related species. (Hint: select View by Region on the related species page.)
Synonymy: Tetracis jubararia Hulst, 1886
Synaxis sericeata Barnes & McDunnough, 1917
Taxonomic Notes: Tetracis jubararia Hulst, 1886, n. comb. in Ferris & Schmidt (2010), was formerly in the genus Synaxis.
Tetracis jubararia
Dick Wilson
Tetracis jubararia
John Davis
Tetracis jubararia
Dick Wilson - DNA
Tetracis jubararia
Jim Moore
Tetracis jubararia
Gary Anweiler
Tetracis jubararia
LG – Jim Troubridge
Tetracis jubararia
LG – Jim Troubridge
Tetracis jubararia
40mm – Jim Vargo

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