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 Possible Eutolmus from UK for ID
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| colinleb |
Posted on 17-08-2021 09:57
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Member Location: Posts: 129 Joined: 16.03.11 |
Having trouble with this specimen. Femora very dark but some surfaces, e.g. posterior face of front femur, look a bit orangey from some angles rather than black. No definite contrasting orange/black pattern. Mix of black/white hairs on frons and arrangement of hairs/bristles on sternites appear to rule out Machimus atricapilla. Compared with specimens of M. cingulatus and measurements in Stubbs and Drake seems rather too big for either of those species anyway. From a close look at the ovipositor, best fit might be Eutolmus rufibarbis? However tergites are dark at margins rather than pale. Not from a known location either. Rough grassland between old woodland and lake on Bedfordshire Greensand, UK. Thoughts? Swept 11 August 2021.
colinleb attached the following image:  [190.77Kb] |
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| colinleb |
Posted on 17-08-2021 09:57
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Member Location: Posts: 129 Joined: 16.03.11 |
Dorsal view
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| colinleb |
Posted on 17-08-2021 09:58
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Member Location: Posts: 129 Joined: 16.03.11 |
Head
colinleb attached the following image:  [223.06Kb] |
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| colinleb |
Posted on 17-08-2021 09:58
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Member Location: Posts: 129 Joined: 16.03.11 |
ovipositor
colinleb attached the following image:  [149.33Kb] |
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| Danny Wolff |
Posted on 17-08-2021 16:45
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 Member Location: Germany Posts: 316 Joined: 27.05.04 |
I see no reason why this should not be atricapillus. Everything is fitting. Body length of living specimens (or specimens that have just been killed) is often bigger than given in literature (in some cases body length is decreasing more than 10-15 % during the drying process).
Recently published: Wolff, Gebel & Geller-Grimm (2018): Die Raubfliegen Deutschlands (The robberflies of Germany) https://www.human...LLER-GRIMM |
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| colinleb |
Posted on 17-08-2021 21:17
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Member Location: Posts: 129 Joined: 16.03.11 |
Thank you Danny. |
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