Enoclerus ichneumoneus (Fabricius, 1777)

Chapman, Eric G., Leavengood, John M. & Dupuis, Julian R., 2025, The Cleridae and Thanerocleridae of eastern North America, with illustrated keys, updated distributions, and special emphasis on the Kentucky fauna, Zootaxa 5639 (1), pp. 1-88 : 39-40

Enoclerus ichneumoneus (Fabricius, 1777) ; Cleridae : Clerinae : Clerini

Illustrations: Plate 2-C. Key to clerid genera, couplet 18-A, C; Enoclerus key, couplet 1-B, couplet 2-A

Distribution: IA to KS to eastern TX to FL to NY and southern ON.

- Recorded from AL, AR, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MD, MO, MS, NC, NE, NJ, NY, OH, OK, PA, SC, TN, TX, UT, VA, WI, WV, Ontario and Quebec ( Wolcott 1909; Wickham & Wolcott 1912; Bøving & Champlain 1920; Wolcott 1947; Papp 1960; Barr 1975; Lebel et al. 2019). Literature records from California, Arizona, possibly Utah ( Wolcott 1947), and generally west of the Rockies should be considered with caution, as misidentifications likely occurred.

- New State Records: LOUISIANA: Kisatchie NF, IV-VII-2004, DR Miller ( UGCA, 3) . WEST VIRGINIA: Harrison County: Bridgeport, 298m, 30.28297N, 80.25728W, LFT, BSF # 48873, 30-VIII-19-IX- 2012 , Tim Smith (JMLC, 1); Pleasants County: St. Mary’s , 22-VII-5-VIII-2008, Lindgren funnel trap, D.A. Dick (WVDA, 1).

Kentucky counties (Map 9): Bourbon (1), Campbell (1), Clay (1), Fayette (5), Franklin (1), Hickman (1), Hopkins (1), Jefferson (3), Laurel (1), Letcher (2), Madison (11), Mercer (1), Owen (9), Pulaski (1), Spencer (1), Wayne (1), Whitley (33). Kentucky specimens were collected state-wide, with most from the eastern half.

Years: 1939 (1), 1940 (1), 1952 (1), 1954 (1), 1967 (33), 1971 (2), 1991 (1), 1994 (1), 1997 (1), 2001 (1), 2004 (1), 2005 (1), 2009 (13), 2010 (1), 2011 (2), 2012 (2), 2013 (2), 2014 (2), 2016 (1), 2018 (1), 2019 (1), 2020 (2), 2021 (2)

Months: January (1), March (3), April (5), May (8), June (44), July (2), August (6), September (3), October (2) Collections (74): BugGuide (4), CEWC (4), EGC-CRC (4), JMLC (15), OSUC (33), UKIC (10), iNat (4) Collection methods: Lindgren funnel trap (2), Malaise trap (16), blacklight (1)

Natural History: Bøving & Champlain (1920) reported this species as an important predator of Scolytus quadrispinosus Say infesting hickory ( Carya ), has been reared from eastern red cedar ( Juniperus virginiana ) infested with cedar bark beetles ( Phloeosinus ) and Cerambycidae ; also reared from maple ( Acer ) and sweet gum ( Liquidambar ) but infestations were not reported. Diurnal as adults, they can be abundant in summer where their Scolytus prey occur and overwinter under bark; larvae occur in Scolytus galleries and mines ( Bøving & Champlain, 1920). It has also been recorded from sumac ( Rhus ) infested by the scolytine Pityophthorus ( Knull 1951) , and calamondin ( Citrus mitis ) ( Leavengood 2008b). An adult was observed feeding on an adult ladybeetle Cycloneda munda (Say) in GA ( Rifkind 2016). Adults have been collected with lights (UV, MV), Steiner traps (often used for fruit flies) and Malaise traps ( Leavengood 2008b).

Mimicry: A mutillid mimic ( Mawdsley, 1994).

Chemical lures: Leavengood (2008b) reported collections via Lindgren funnel traps baited with ethanol or turpentine + frontalin from label data, but the attractiveness of these lures to E. ichneumonius has yet to be tested.