Forum Entomologi Italiani

Ciao,

# 2413 ♂ captured at an altitude of 940/945 m. in Cne : Lac-des-Rouges-Truites (Dépt. Jura - France) - 30.05.1992
# 2320 ♀ captured at an altitude of 1170 m. in Forest of Grand-Colombier, Cne : Virieu-le-Petit (Dépt. Ain - France) - 08.07.1989


The Tenthredininae, which have the body with certain green parts, are only : Rhogogaster s.l.- Tenthredo (Eurogaster) - Tenthredo (Olivacedo) olivacea.

- All Eurogaster have the habitus identical to E. mesomela which I already sent on the forum :
viewtopic.php?f=375&t=25280&hilit=+eurogaster
One cannot confuse them with other "green Tenthredininae".
- In general rule it is difficult to differentiate Rhogogaster and Olivacedo, if one did not captured a certain number of it.
In my opinion the only criterion making it possible to differentiate this 2 genera is provided by the relationship between, the distance between the eyes, and the width of Clypeus :

Rhogogaster : The distance between the eyes is much larger than the width of the clypeus.
Olivacedo : The distance between the eyes is hardly larger than the width of the clypeus.
One will find here after the photos of face of olivacea ♂ & ♀, but also those of face of Rhogogaster sp. ♂ & ♀.

Being given these considerations, our 2 captures are thus Tenthredo (Olivacedo) olivacea Klug 1817 Che vivono in Italia

See also the capture of marco paglialunga : viewtopic.php?f=375&t=22099
One will note the extreme variability of colouring of the abdomens.

Saluti.

D & JP Balmer