Xylotrechus (Xylotrechus) hircus (Gebler, 1825)
[= Clytus decolor Thieme, 1881]

Subfamilia: CERAMBYCINAE  /  Tribus: CLYTINI

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[Photo © David Navrátil, click on the picture for 4K resolution]

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Xylotrechus (Xylotrechus) hircus, a North-Asian species distributed in China, Mongolia, Korea, Japan, Kazakhstan and Russia, has been described from Siberia as Clytus hircus by Friedrich August Gebler in 1825 [✳]. Larvae of X. hircus develop in weakened, dying or freshly dead birch (Betula spp.) branches and twigs. Larvae feed subcortically and later in wood, create galleries filled by fine frass. After the second overwintering they create a pupal cell in the upper wood layer at the end of the larval gallery. Life-cycle 2 years, adults are active from June to early August and can be fouind on dying, uprooted or felled host trees [❖].

Body length:	7 - 17 mm
Life cycle:	2 and more years
Adults in:	June - early August
Host plant:	monophagous on birch (Betula)
Distribution:	China, Mongolia, Korea, Japan, Kazakhstan, Russia (Siberia and Far East)

The depicted beetles were collected in: (♂) - Arsenyev (Арсе́ньев) environs (Primorsky Krai, Far Eastern federal district, Russia) in July 1990; in Kundur (Кундур) village environs (Arkharinsky district, Amur region, Far Eastern federal district, Russia) in July 1990.

Collected by our friend Robert "Robin" Čermák and Jiří Lorenc Sr.

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[✳]
Gebler F.A.:
IV. Coleopterorum Sibiriae Species Novae.
Essais Entomologiques 4: 42-57, 1825. [download ]

[❖]
Cherepanov A.I.:
Cerambycidae of Northern Asia, Volume 2 - Cerambycinae Part II.
Amerind Publishing, New Delhi: 354pp [pages 31-37], 1988. [download ]

Karpiński L., Szczepański W.T., Boldgiv B. and Walczak M.:
New data on the longhorn beetles of Mongolia with particular emphasis on the genus Eodorcadion Breuning, 1947 (Coleoptera, Cerambycidae).
ZooKeys 739: 107-150, 2018. [download ]

Karpiński L., Szczepański W.T., Plewa R., Walczak M., Hilszczański J., Kruszelnicki L., Łoś K., Jaworski T., Bidas M. & Tarwacki G.:
New data on the distribution, biology and ecology of the longhorn beetles from the area of South and East Kazakhstan (Coleoptera, Cerambycidae).
ZooKeys 805: 59-126, 2018. [download ]

Han Y. and Lyu D.:
Taxonomic Review of the Genus Xylotrechus (Coleoptera: Cerambycidae: Cerambycinae) in Korea with a Newly Recorded Species.
Korean Journal of Applied Entomolology 49 (2): 69-82, 2010. [download ]

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Subfamilia	Cerambycinae Latreille, 1802
Tribus	Clytini Mulsant, 1839
Genus	Xylotrechus Chevrolat, 1860
Subgenus	Xylotrechus Chevrolat, 1860
Species	Xylotrechus (Xylotrechus) hircus (Gebler, 1825)