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For Insects, Spiders & Their Kin
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Species Psyrassa unicolor - Branch Pruner

narrow reddish longhorn - Psyrassa unicolor Anephlomorpha subpubescens - Psyrassa unicolor BG2987 E8290 - Psyrassa unicolor Unknown Longhorn Beetle - Psyrassa unicolor Psyrassa unicolor? - Psyrassa unicolor 18june2012-col1 - Psyrassa unicolor Psyrassa pertenuis - Psyrassa unicolor 10 - Psyrassa unicolor
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Long-horned and Leaf Beetles)
Family Cerambycidae (Long-horned Beetles)
Subfamily Cerambycinae
Tribe Elaphidiini
Genus Psyrassa
Species unicolor (Branch Pruner)
Synonyms and other taxonomic changes
Psyrassa unicolor (Randall, 1838)
Size
about 10 mm
Identification
uniformly orange to reddish-brown body, legs, and antennae; eyes black; body long, slender, and cylindrical; pronotum same width as head but almost twice as long; elytra nearly parallel-sided, slightly wider than pronotum and 3-5 times longer
Range
most (?) of US and parts of southern Canada (NS QC ON)
Habitat
larvae on branches and twigs of host trees in spring
adults may be attracted to artificial light
Season
adults found in summer
Food
larvae feed on the twigs and branches of hickory, pecan, and other hardwoods, girdling the branches deeply enough to cause them to break before leafout in spring
See Also
P. pertenuis is similar but has conspicuous spine on 3rd antennal segment, and is restricted to coastal states of southeastern US (image: cerambycids.com)
Internet References
pinned adult image (insectimages.org)
image of damage to tree branch caused by larva (James Solomon, USDA Forest Services)