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Genus Tychius

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Tychius meliloti Stephens new to Canada with a brief review of the species of Tychius Germar introduced into North America...
By R.S. Anderson and A.T. Howden
The Canadian Entomologist 126(6): 1363-1368, 1994

all four spp. listed are in the guide, but the ranges might have changed significantly since 1994

Classification of the weevil subfamily Tychiinae, with a new genus and species, new combinations, and new synonymy in Lignyodini
By Clark W.E., Warner R.E., Whitehead D.R.
The Coleopterists Bulletin 31: 1-18, 1977

First record of Orchestes fagi (L.) in North America, with a checklist of the North Amercian Rhamphini
By Sweeney, J., R.S. Anderson, and R.P. Webster
The Coleopterists Bulletin, 66: 297-304, 2012
Full title: "First record of Orchestes fagi (L.) (Coleoptera: Curculionidae: Curculioninae) in North America, with a checklist of the North Amercian Rhamphini"

Includes updated key to the genus.

Revision of the subfamily Rhynchaeninae in North America (Coleoptera: Curculionidae)
By Anderson, R.S.
Transactions of the American Entomological Society, 115: 207-312, 1989
Much useful information on our species, but see (1) for information on additional introduced species.

Revision of the weevil genera Magdalinops Dietz and Chelonychus Dietz (Coleoptera: Curculionidae, Anthonomini)
By Clark, W.E. and H.R. Burke
The Coleopterists Bulletin, 56: 107-122, 2002

New Rhynchophora II (Coleoptera, Curculionidae).
By Sleeper, E.L.
The Ohio Journal of Science, 54(3): 180-186., 1954
Full PDF

Sleeper, E.L. 1954. New Rhynchophora II (Coleoptera, Curculionidae). The Ohio Journal of Science, 54(3): 180-186.

Atlas and checklist of the bark and ambrosia beetles of Texas and Oklahoma (Curculionidae: Scolytinae and Platypodinae)
By Atkinson T.H., Riley E.G.
Insecta Mundi 02920: 1-46, 2013

Bark beetles and pinhole borers (Curculionidae, Scolytinae, Platypodinae) alien to Europe
By L.R. Kirkendall, M. Faccoli
Zookeys 56: 227–251, 2010

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