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bivittata / nigripennis

Flower Longhorn - Brachysomida Brachysomida bivittata - Brachysomida Long-horned beetle - Brachysomida Flower Longhorn - Brachysomida what species? - Brachysomida Bombarier Beetle? - Brachysomida Rhagiine? - Brachysomida Beetle - Brachysomida
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 Lepturinae (Flower Longhorns)
Tribe Rhagiini
Genus Brachysomida
No Taxon bivittata / nigripennis
Explanation of Names
For some images it is difficult to see the pronotal pubescence to determine the species. This page is for those images where we can be certain it is one of these two species but not certain which one.
Identification
B. nigripennis is evidenced by the smooth, shining pronotum without pubescence at the base and along the margins. It lacks the dense punctation along the pronotal midline, and it lacks distinct pubescence on the elytra.
B. bivittata has denser pubescence on the margins and base of the pronotum. See this image for a good example of bivittata
… Robert Androw, 9 January, 2020