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Genus Chilocorus - Twice-stabbed Lady Beetles

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The Scymnini (Coleoptera: Coccinellidae) of the United States & Canada: Key to genera and revision of Scymnus, Nephus, & Diomus
By Robert D. Gordon
Bulletin of the Buffalo Society of Natural Sciences, Buffalo, NY, Vol 28, 1976
While Gordon's 1985 work, "The Coccinellidae (Coleoptera) of America North of Mexico" (ref (1)) does contain keys, illustrations, and distribution maps for all species, for "detailed description and discussion" for Scymnini the reader is referred to this earlier work.

As of 2006, copies were still available from the publisher.

Phylogeny and classification of Cucujoidea and the recognition of a new superfamily Coccinelloidea (Coleoptera: Cucujiformia)
By Robertson J.A., Ślipiński A., Moulton M., Shockley F.W., Giorgi A., Lord N.P., McKenna D.D., Tomaszewska W., Forrester J. ...
Syst. Entomol. doi: 10.1111/syen.12138, 2015

New North American associations of Coleoptera with Myxomycetes
By Stephenson S.L., Wheeler Q.D., McHugh J.V., Fraissinet P.R.
J. Nat. Hist. 28: 921–936, 1994

New southwestern Buprestidae and Cerambycidae with notes.
By Knull, J.N.
Ohio Journal of Science 37(5): 301-309., 1937
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Knull, J.N. 1937. New southwestern Buprestidae and Cerambycidae with notes. Ohio Journal of Science 37(5): 301-309.

First Texas records of five genera of aquatic beetles (Coleoptera: Noteridae, Dytiscidae, Hydrophilidae) with habitat notes.
By Jasper S.K., Vogtsberger R.C.
Entomological News 107(1): 49-60., 1996
CAB Direct

Jasper S.K., Vogtsberger R.C. (1996) First Texas records of five genera of aquatic beetles (Coleoptera: Noteridae, Dytiscidae, Hydrophilidae) with habitat notes. Entomological News 107(1): 49-60.

Abstract: Five genera of aquatic beetles are reported from Texas, USA, for the first time. Species recorded include

Suphis inflatus (Noteridae),
Hoperius planatus (Dytiscidae),
Dibolocelus ovatus,
Hydrobiomorpha casta and
Sperchopsis tessellata (Hydrophilidae).

Habitat notes are reported for 4 of these.

Synopsis of adventive species of Coleoptera (Insecta) recorded from Canada. Part 4: Scarabaeoidea... [through Cleroidea]
By Klimaszewski J, Langor D, Smith A, Hoebeke E, Davies A, Pelletier G, Douglas HB, Webster RP, Bourdon C, Borowiec L, Scudder GGE
Pensoft Series Faunistica 116: 1-215, 2017
Full title: Synopsis of adventive species of Coleoptera (Insecta) recorded from Canada. Part 4: Scarabaeoidea, Scirtoidea, Buprestoidea, Byrrhoidea, Elateroidea, Derodontoidea, Bostrichoidea, and Cleroidea

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Handbook of Zoology. Coleoptera Vol. 3: Morphology and Systematics (Phytophaga)
By Leschen R.A.B., Beutel R.G. (eds)
Walter de Gruyter, Berlin. 687 pp., 2014

Review of the American Corylophidae, Cryptophagidae, Tritomidae and Dermestidae, with other studies
By T. L. Casey
Journal of the New York Entomological Society, Vol 8, No. 2, 51-172, 1900

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