Thread subject: Diptera.info :: Bithia spreta <- tachinid with red lateral abdomen

Posted by Carnifex on 11-09-2025 23:21
#1
Tried the Tschorsnig key, but apparently took a wrong turn somewhere...

Lower Austria, mid Sept

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Edited by Carnifex on 12-09-2025 22:26

Posted by John Carr on 12-09-2025 13:43
#2
Some characters made me think Leskiini, but the wing veins have too many hairs. In North America the veins other than R1 and the base of R4+5 are bare.

Posted by eklans on 12-09-2025 14:46
#3
If the scapi are distinctly separated (2/3 width of flagellum) - a dorsal view could help - what about Eriothrix monticola?

Posted by John Carr on 12-09-2025 15:20
#4
eklans wrote:
If the scapi are distinctly separated (2/3 width of flagellum) - a dorsal view could help - what about Eriothrix monticola?


I expect Eriothrix to have strong crossed apical (or subapical) scutellar bristles, typical of Dexiinae.

Posted by Carnifex on 12-09-2025 15:25
#5
Michael Knapp suggested Bithia spreta - a species which seems to have an affinity for Achillea.

Also, it seem I took a wrong turn when it came to "cheeks bare vs not bare".

I thought the few hair would be sufficient to count as 'not bare' - but seems I was mistaken

Posted by Zeegers on 12-09-2025 21:49
#6
Yes, Bithia spreta would be my suggestion as well.

Theo

Posted by Carnifex on 12-09-2025 22:26
#7
Thanks guys!