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Suborder Polyphaga

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Dichotomous and matrix-based keys to the Ips bark beetles of the World (Coleoptera: Curculionidae: Scolytinae)
By Douglas H.B., Cognato A.I., Grebennikov V., Savard K.
Canadian Journal of Arthropod Identification 38: 1-234, 2019

Revision of the new world species of Hylurgops LeConte, 1876 with the description of a new genus in the Hylastini (Coleopt...
By Mercado-Vélez, J.E. & Negrón, J.F.
Zootaxa 3785 (3): 301-342, 2014
PDF available here

New Lechriops Species for the United States (Coleoptera: Curculionidae: Conoderinae)
By Hespenheide, H.A.
The Coleopterists Bulletin, 57(3):345-352, 2003

Graphognathus Buchanan a new synonym of Naupactus Dejean and systematics of the N. leucoloma species group (Col.: Curculionidae)
By Lanteri A.A., Marvaldi A.E
Col. Bull. 49: 206-228, 1995

Notes on North American species of Polydrusus Germar (Coleoptera: Curculionidae, Brachyderinae) .
By Sleeper, E.L.
The Ohio Journal of Science. 57(3): 129-134., 1957
Full PDF

Sleeper, E.L. 1957. Notes on North American species of Polydrusus Germar (Coleoptera: Curculionidae, Brachyderinae): 17. A Contribution to the Knowledge of the Curculionoidea. The Ohio Journal of Science. 57(3): 129-134.

Revision of the genus Sitona (Coleoptera: Curculionidae) of North America
By Bright D.E.
Ann. Ent. Soc. Am. 87: 277‒306, 1994

A Taxonomic Study of the Genus Ceutorhynchus (Coleoptera, Curculionidae)
By Schreiber RA
Michigan State University Ph.D thesis, 1963
PDF

I'm not sure this reference matches the current taxonomy so caveat emptor

New records of Rhinoncus bruchoides (Herbst) for the Western Hemisphere and a revised key to the North American species...
By E.R. Hoebeke & D.R. Whitehead
Proceedings of the Entomological Society of Washington, 82(4): 556-561, 1980
Full title: "New records of Rhinoncus bruchoides (Herbst) for the Western Hemisphere and a revised key to the North American species of the genus Rhinoncus (Coleoptera: Curculionidae: Ceutorhynchinae)"

Full text @ Biodiversity Heritage Library: http://www.biodiversitylibrary.org/item/54962#page/588/mode/1up

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