Arge cyanocrocea - Broad-barred Fusehorn
One of the black and yellow species, widely distributed north to Fife (Musgrove, 2022). Arge cyanocrocea has a dark band across the forewings beneath the stigma and extending right across the wing. Basal to the band the wing is yellowish and apical to the band the wing is grey. The hind legs are normally yellow with black apices to the femur, tibia and tarsus. However, the amount of black is variable and the hind femurs can be entirely black. The similar Arge melanochra has entirely black hind femurs but the dark wing smudge does not extending all the way across the wing. Identification can be confirmed by the venation in the hind wing.
Adults visit umbels of hogweed, etc.
Larvae feed on Rubus.
Size: 7 - 8mm.
IUCN Status: Least Concern
GB Rarity Status: None
Distribution: England, Scotland, Wales, Ireland
Flight period: May to July
Plant associations: Rubus spp. Brambles (Benson, 1952).
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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- Arge cyanocrocea female
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- Arge cyanocrocea female
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- Arge cyanocrocea female (dark form) Credit Andrew Green
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- Arge cyanocrocea male Credit Ian Andrews
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- Arge cyanocrocea female ovipositing on bramble Credit Andrew Green
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- Arge cyanocrocea larva Credit John Grearson
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- Arge cyanocrocea first instar on bramble Credit Andrew Green
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- Arge cyanocrocea ova on bramble Credit Andrew Green
References:
Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168. https://doi.org/10.3897/BDJ.2.e1168
Musgrove, A.J. 2022. A review of the status of sawflies of Great Britain - Phase 1: families other than Tenthredinidae. Natural England, unpublished