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Knulliana cincta cincta
http://bugguide.net/node/view/6804 - 15-30 mm - Markings may be absent. Scutellum much longer than broad. - "There are no other NE longhorns of similar size and coloration that have strong spines on the femora, pronotum, and elytral apices."
Range - ne US to AZ - (Knulliana cincta cincta are common in TX) - Season Mar-Oct (mostly) - Larvae feed on dead and seasoned branches/limbs of hardwoods, including oak and hickory. - Juglans, Carya, Castanea, Quercus, Celtis, Pyrus, Sapindus, Salix (Linsley 1962), Prosopis (Hovore & Giesbert 1976), Citrus (Dean 1953), Leucaena (Hovore & Penrose 1982) - Eggs are laid in crevices in the bark, or directly into the wood; larvae feed the first season beneath the bark, then head deeper into the woods.
This one was found under the porch light.
Thank you Argy Bee... Timing is everything. Later I went back out and it was gone. I started searching my hair, back and arms. LOL