Forum Entomologi Italiani

Capture in "Forêt de Couloutre" (dépt. Nièvre) - 24 V 2012
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Biblio :
- Berland 1947 : Faune de France ... Hymenoptera Tenthredoïdes

http://www.faunedefrance.org/bibliotheq ... doides.pdf

- Enslin 1912/1918 : Die Tenthredinoidea Mitteleuropas
- Haris 2000 : in “Folia Entomologica Hungarica, LXI - p.95/148" - Study on the Palaearctic Dolerus ...
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Determination of Tribe Dolerinae, see :

http://www.entomologiitaliani.net/public/forum/phpBB3/viewtopic.php?f=370&t=21257&hilit=tenthredinidae

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Being given the entirely black coloring of the insect, we can hesitate between Dolerus & Loderus palmatus.
The distinction is made on the shape of the sawsheat (see drawing from Berland & photo)
Thus, it is a Dolerus
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To determine the species we used 2 keys.
At first with Berland’s key [verified with Enslin’s key] :
- Body entirely black (included Antennae).
- Sawsheat dorsally not widened apically.
- Posterior furrow of the median lobe of Mesonotum forming an angle lower than 90°.
Then with Haris’s key :
- The distance between the tips of the longest Hairs is bigger than the dorsal width of the Sawsheat and these Hairs are not apically curved.

[For Dolerinae, the shape of the Sawsheat and especially the form of its hairs are very often specific criteria]

- Clypeus deeply emarginated (almost to a depth of half of its total length).

Where from my determination
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The species was captured in numerous European countries, but according to Haris it is sporadic.