Biblio.
- Chevin : Tenthredo succincta Lep. 1823, espèce valide .... in "Cahiers des Naturalistes Parisiens" 1983 - n.s. 39 - p.15/18
- marginella (of Chevin) = thompsoni , succincta (of Chevin) = marginella
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Saluti,
# 1569 ♂ & 1571 ♀ Captured at the same time & in the same place, Cne : Pontoise (Dépt. Val d' Oise - France) - 08.09.1986
- Although not copulating I think that it is about the same species.
For the keys of determination of this sp., see : viewtopic.php?f=11&t=34877 & viewtopic.php?f=375&t=35433
See also marginella : viewtopic.php?f=11&t=35850
Therefore : thompsoni or marginella
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1571 ♀
According to the keys above this ♀ is a thompsoni, because the teeth of his saw are projecting.
- See my photo (whence the contrasts were strongly stressed) of very bad quality (The magnification of my binocular lens being of X40, it would be necessary X70) where I added awkwardly the drawing of the ventral outline of a part of the saw.
1569 ♂
According to Chevin, the punctuation of mesopleura is not easy to estimate.
The color of mandibles (ignored by Chevin) is difficult to use, except in the extreme cases :
- - According to Taeger , the colors of the mandibles (apex excluded) are the following ones :
- marginella : The base is always black.
thompsoni : The base is yellow, very rarely black (in that case they are stained with yellow towards the apex)
It is thus generally difficult to recognize the species
- Its mandibles are, from their base, very mainly yellow.
- It was captured at the same time & in the same place that the thompsoni ♀ .
- Its date of capture is late (marginella appearing earlier - cf. Chevin)
For these reasons, this ♂ is a thompsoni
Finally :
Tenthredo (Tenthredo) thompsoni (Curtis 1839) ♂ & ♀ Anche catturato in Italia
Ciao,
D & JP Balmer
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