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On a wall, 26.viii.2022 (Spain: Girona: Beuda), determination using Mosch Web [Cerretti, Tschorsnig, Lopresti, Di Giovanni. ZooKeys 205: 5–18. doi: 10.3897/zookeys.205.3409]

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[TAXA OUTPUT]

Acemya Robineau-Desvoidy, 1830: 202
Stomina Robineau-Desvoidy, 1830: 411

[SELECTED CHOICE]

(1) EYE
-Eye bare or nearly bare: hairs, if present, not longer than diameter of 2 eye facets
(2) OCELLI
-ocelli present
(25) DORSAL PART OF OCCIPUT
-postero dorsal part of head without black setulae behind postocular row
(39) SCUTUM: PRESUTURAL STRIPES
-... with three, four or five presutural dark vittae, or uniformly covered with pruinosity
(44) PRESUTURAL ACROSTICHAL SETAE
-... two ...
(45) PRESUTURAL DORSOCENTRAL SETAE
-... two ...
(46) POSTSUTURAL DORSOCENTRAL SETAE
-... three ...
(52) SCUTELLUM COLOUR
-scutellum mainly black, more or less red or yellowish apically
-scutellum mainly red or yellowish
(73) BEND OF M
-bend of M forming a distinctly obtuse angle
(76) RATIOS OF VEIN M
-section of M between R-M and DM-Cu visibly longer than section between DM-Cu and bend of M
(77) CROSSVEIN DM-Cu
-crossvein DM-Cu not exceptionally oblique
(78) PETIOLE [STALK]
-cell r4+5 open [or vein m not reaching wing margin]
(88) PRUINOSITY OF ABDOMEN
-abdomen entirely covered by dense, sometimes not uniform, pruinosity, tessellated or showing dark patches


https://www.inaturalist.org/observations/132483351

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Difficult. There seem to be only 2 post IA on thorax, that should be a big clue (favouring Acemyiini, I guess).
Any chance of a pic showing lateral view, o matter how bad ?

Theo

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No, sorry :-( the camera could'nt get into the wall, to take a shot more ventrally.

There are clearly 2 post sutural intra-alar setae. If I add two postsutural intra-alar setae separated by a distance equal at most to distance between the first seta and the suture, then it is also left Acemya and Stomina.

I add another dorsolateral view.

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The first flagellomere of Acemya is pointed at the upper tip, not rounded as usual in Tachinidae.

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Thanks, John, then it's not Acemyia

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Even if the view of the flagellomere is not good, Acemyia looks quite different.

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Well, it could be a female Stomina, but I am not totally sure.

Theo

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Ok

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Repeated the key

(1) EYE
-Eye bare or nearly bare: hairs, if present, not longer than diameter of 2 eye facets
(2) OCELLI
-ocelli present
(25) DORSAL PART OF OCCIPUT
-postero dorsal part of head without black setulae behind postocular row
(30) APEX OF FIRST FLAGELLOMERE
-non-sharpened apex
(39) SCUTUM: PRESUTURAL STRIPES
-... with three, four or five presutural dark vittae, or uniformly covered with pruinosity
(44) PRESUTURAL ACROSTICHAL SETAE
-... two ...
(45) PRESUTURAL DORSOCENTRAL SETAE
-... two ...
(46) POSTSUTURAL DORSOCENTRAL SETAE
-... three ...
(47) POSTSUTURAL INTRA-ALAR SETAE
-two postsutural intra-alar setae separated by a distance equal at most to distance between the first seta and the suture
(52) SCUTELLUM COLOUR
-scutellum mainly black, more or less red or yellowish apically
-scutellum mainly red or yellowish
(73) BEND OF M
-bend of M forming a distinctly obtuse angle
(76) RATIOS OF VEIN M
-section of M between R-M and DM-Cu visibly longer than section between DM-Cu and bend of M
(77) CROSSVEIN DM-Cu
-crossvein DM-Cu not exceptionally oblique
(78) PETIOLE [STALK]
-cell r4+5 open [or vein m not reaching wing margin]
(88) PRUINOSITY OF ABDOMEN
-abdomen entirely covered by dense, sometimes not uniform, pruinosity, tessellated or showing dark patches.

Taxa output= Stomina Robineau-Desvoidy, 1830: 411

Somebody else wrote me it was not S.caliendrata

https://www.inaturalist.org/observations/132483351

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The frons seems to be bigger than an eye?
Abdomen seems to be black lateral - not yellowish or red (1st img.)?
Fore tarsomere 5 seems to be approx. as long as wide (2nd img)?
And if the claws of the fore tarsus are at most half as long as tarsomere 5 it could be the female Stomina calvescens
from Ceretti (2010): I tachinidi della fauna italiana

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Thank you Eric :-)
I have found and studied the key and agree it must be calvescens
Best wishes
Rafael

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Females Stomina are very tricky ….