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Diptera.info :: Family forums :: Syrphidae
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Under bark of dead beech (NL)
blaauw7
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Posted on 05-02-2017 11:06
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Location: Wageningen, Netherlands
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 Found yesterday under bark of dead beech. Mid Netherlands. length 11 mm.

Gr Dick
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blaauw7
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blaauw7
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Paul Beuk
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Posted on 05-02-2017 16:01
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 I think a larva of Xylota.
Paul

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blaauw7
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Posted on 05-02-2017 21:42
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 Thanks Paul.

If I read this http://www.dipteristsforum.org.uk/documents/DD/df_1_9_Colour_Guide_to%20Hoverfly_Larvae.pdf

I will end up with Chalcosyrphus.

Chalcosyrphus CUITan, 1925
Overall appearance. A short-taileD, slightly dorso-ventrally flattened larva; mouth-hooks internal; thorax with two groups of 1-2 black hooks, each group lateral to the anterior spiracle; below these hooks and separate from them there may be a smaller single black hook (c. nemorum).
Confirming characters. Anterior fold with a narrow band of 3-4 rows of spicules, second row with the largest spicules; prolegs small with 6 to 8 primary crochets; anal segment slightly extendeD (like X. segnis in Plate lit) with three pairs of evenly sized lappets.
Related taxa. Similar to Tropidia and other hook-bearing hoverfly larvae. The one or two groups of hooks on the lateral margins of the thorax and dorso-ventrally flattened shape with a barely extendeD anal segment distinguishes Chalcosyrphus from these taxa.
Biology. Larvae are found in sap runs and under bark in acumulations of decaying sap



Gr Dick
 
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rafael_carbonell
07.03.24 00:01
Some flies preserved in ethanol and then pinned often get the eyes sunken, how can this be avoided? Best answer: I usually keep alcohol-collected material in alcohol

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17.08.23 15:23
Aneomochtherus

pjt
17.08.23 13:54
Tony, I HAD a blank in the file name. Sorry!

pjt
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Tony, thanks! I tried it (see "Cylindromyia" Wink but don't see the image in the post.

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pjt - just send the post and attached image. Do not preview thread, as this will lose the link to the image,

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