Diptera.info :: Family forums :: Asilidae Forum
 Asilidae - Dioctria genus?
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| Justafly |
Posted on 27-11-2018 11:45
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Member Location: Posts: 234 Joined: 19.08.12 |
Creto, Genova, 1014-07-19 ... and the species? Thank you for any your comment. 
Justafly attached the following image:  [103.02Kb] |
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| Piluca_Alvarez |
Posted on 27-11-2018 18:47
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 Member Location: Madrid, Spain Posts: 2431 Joined: 06.11.10 |
Reminds me a lot of Dioctria bicincta... but cannot see all features well (I miss a proper view of the antennae) so I might be wrong. Better wait for Reinoud. In any case, this is a species I am not familiar with. |
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| Justafly |
Posted on 28-11-2018 10:36
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Member Location: Posts: 234 Joined: 19.08.12 |
Here you are another photo. May be it could be more useful. Thank you in any case. 
Justafly attached the following image:  [91.08Kb] |
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| Piluca_Alvarez |
Posted on 29-11-2018 23:18
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Member Location: Madrid, Spain Posts: 2431 Joined: 06.11.10 |
Thanks for the new picture! Pity that I don't see the length of the second antennal segment clearly enough... But still, if I forget about this feature, still the rest fits Dioctria bicincta nicely I have just checked and it is present in Italy so, that is a good sign |
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| Quaedfliegh |
Posted on 29-11-2018 23:52
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 Member Location: Tilburg Netherlands Posts: 2219 Joined: 18.05.10 |
You could well be right Piluca, but the hind meta tarsi seem a bit narrow for the species which would point at D. gracilis. A tough one to ID
Greetings, Reinoud Field guide to the robber flies of the Netherlands and Belgium: https://www.jeugdbondsuitgeverij.nl/product/field-guide-to-the-robberflies-of-the-netherlands-and-belgium/ https://www.nev.nl/diptera/ |
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| Piluca_Alvarez |
Posted on 30-11-2018 12:28
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Member Location: Madrid, Spain Posts: 2431 Joined: 06.11.10 |
Thanks, Reinoud! Good thing you are always around! Dioctria keeps confusing me  Sorry for the mistake, Justafly  But I thought females of bicincta and gracilis are very difficult to separate and D. gracilis appears in Fauna Europaea as doubtly present in all countries were it was previously cited. And bicincta is present in Italy so I assumed it had to be that one. Too much assuming on my part, sorry. |
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| Justafly |
Posted on 30-11-2018 13:35
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Member Location: Posts: 234 Joined: 19.08.12 |
Moreover we should consider that Dioctria gracilis in Italy appears present (with a question mark) only in Sardinia! Cfr. http://www.faunaitalia.it/checklist/invertebrates/families/Asilidae.html Ciao to everybody |
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| Quaedfliegh |
Posted on 30-11-2018 21:51
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Member Location: Tilburg Netherlands Posts: 2219 Joined: 18.05.10 |
According to Engel the two species are very difficult to separate and also FGG says that the females can not be separated in his online key. This is a female...... :-) As D. gracilis is only known from Sardinia, this may well be D. bincincta, Piluca is right! Although D. gracilis is also known from France.... The doubtful presence seems to mean that someone doubts D. gracilis as a valid species. Otherwise the species wouldn't occur anywhere and would be non existant.
Greetings, Reinoud Field guide to the robber flies of the Netherlands and Belgium: https://www.jeugdbondsuitgeverij.nl/product/field-guide-to-the-robberflies-of-the-netherlands-and-belgium/ https://www.nev.nl/diptera/ |
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