Diptera.info :: Identification queries :: Diptera (adults)
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 Bithia => Bithia sp.
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| Jessica |
Posted on 22-01-2025 16:31
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Member Location: Posts: 257 Joined: 28.08.18 |
Hello, I think it's a male Bithia ? But I can't choose between Bithia demotica and Bithia modesta. Maybe even Bithia immaculata, I find that T2 is not shaded all the way to the posterior margin, but the dark spot is really very close to the posterior margin so I don't know if that matters I have other pictures if needed  Jessica Joachim : France : Serviès : 81220 : 15/06/2024 Altitude : 295 m - Taille : 10 mm environ Réf. : 353815 Edited by Jessica on 23-01-2025 16:09 |
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| John Carr |
Posted on 22-01-2025 17:15
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 Member Location: Massachusetts, USA Posts: 10234 Joined: 22.10.10 |
If you take the alternative with excavation of T1+2 not extending to posterior margin you end up at a group of species with wider frons. As I interpret the keys it can't be Bithia immaculata because the abdomen is not immaculate. I can not distinguish demotica, modesta, and proletaria. Cerretti's key says distal half of scutellum yellow for modesta and scutellum almost entirely yellow for proletaria. Your fly might fit either alternative. |
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| Jessica |
Posted on 22-01-2025 17:37
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Member Location: Posts: 257 Joined: 28.08.18 |
Thank you so much. I said immaculata but I rather wanted to say acanthophora. I didn't know Bithia proletaria. It's not noted from France, but from Italy, it's not very far. What about the color of the scutellum of demotica ? Is this key accessible? Edited by Jessica on 22-01-2025 17:39 |
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| John Carr |
Posted on 22-01-2025 20:44
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Member Location: Massachusetts, USA Posts: 10234 Joined: 22.10.10 |
Cerretti's book is I tachinidi della fauna italiana (Diptera Tachinidae).
Edited by John Carr on 22-01-2025 20:44 |
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| Jessica |
Posted on 23-01-2025 16:09
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Member Location: Posts: 257 Joined: 28.08.18 |
Thank you very much ! |
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| Zeegers |
Posted on 24-01-2025 21:54
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Member Location: Soest, NL Posts: 18843 Joined: 21.07.04 |
Demotica and modesta can not be distinguushed on externel features. So no wonder you couldn't decide .... Theo |
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| Jessica |
Posted on 25-01-2025 10:43
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Member Location: Posts: 257 Joined: 28.08.18 |
Thank you very much Theo ! If I am not mistaken, we can still distinguish the two species with the females? If the palps are black it is modesta, on the other hand if they are yellow it can be both species. But for this one it does not count since it is a male 
Edited by Jessica on 25-01-2025 10:43 |
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