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Species Tylonotus bimaculatus - Ash and Privet Borer

Tylonotus bimaculatus. - Tylonotus bimaculatus Another longhorn I found early July - Tylonotus bimaculatus Tylonotus bimaculatus Tylonotus bimaculatus  - Tylonotus bimaculatus Ash and Privet Borer - Tylonotus bimaculatus 20150623-DSC_1179 - Tylonotus bimaculatus Coleoptera - Tylonotus bimaculatus Tylonotus bimaculatus (Ash & Privet Borer) - Tylonotus bimaculatus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Longhorn and Leaf Beetles)
Family Cerambycidae (Longhorn Beetles)
Subfamily Cerambycinae
Tribe Hesperophanini
Genus Tylonotus
Species bimaculatus (Ash and Privet Borer)
Explanation of Names
Tylonotus bimaculatus Haldeman 1847
9-18 mm(1)
e NA to AZ (QC-FL to MB-AZ)(2)(3)
mostly June-Aug (BG data)
Live or dying hardwoods, especially ash and privet(1), but also Ulmus, Carya, Juglans spp. and Betula(3)
Life Cycle
Eggs are laid at the base of privet plants and beneath bark scales of ash trees during the early summer. Young larvae feed in the phloem, later penetrating deeper and scarring the wood. Large branches of ash are usually attacked and killed before the trunk is attached.(4)

The larval stage is 2 years(4)
comes to UV lights(1), uncommon(3)
Internet References
Works Cited
1.Field Guide to Northeastern Longhorned Beetles (Coleoptera: Cerambycidae)
Douglas Yanega. 1996. Illinois Natural History Survey.
2.Bousquet Y., ed. (1991) Checklist of the beetles of Canada and Alaska
3.Illustrated Key to the Longhorned Woodboring Beetles of the Eastern United States
Steven W. Lingafelter. 2008. Coleopterists Society.
4.Eastern Forest Insects
Whiteford L. Baker. 1972. U.S. Department of Agriculture · Forest Service.