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Photo#265781
Creosote Moth larva - Digrammia colorata

Creosote Moth larva - Digrammia colorata
Dog Canyon, Otero County, New Mexico, USA
April 13, 2009
I found this Geometrid larva on Creosote Bush and suspect it is Digrammia colorata - Creosote Moth - Hodges#6381. The link to a live larva photo is dead. Can anyone confirm?

Synglochis perumbraria is the other possibility
I have called a caterpillar with this appearance that name, based on the presence of a small horn in mature instars which seems to indicate Boarmiini as the tribe. I don't think Macariini caterpillars can have this. But I am only guessing still.

I found images
of two other forms http://tinyurl.com/d89byr. The pattern is very similar. I think this is the dark form (twig mimic).

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