Thread subject: Diptera.info :: Tachinidae - Nemorilla cf. floralis

Posted by Morten A Mjelde on 17-01-2024 19:45
#1

I was hoping I had kept this one, but I couldn't find it. Tried to key it from the pictures, but I don't see enough detail. First impression was Nemorilla, but it could be something else. Southeast Norway 18 July 2023.

Edited by Morten A Mjelde on 19-01-2024 11:09

Posted by Morten A Mjelde on 17-01-2024 19:46
#2

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Posted by Morten A Mjelde on 17-01-2024 19:46
#3

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Posted by Morten A Mjelde on 17-01-2024 19:47
#4

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Posted by Morten A Mjelde on 17-01-2024 19:47
#5

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Posted by Zeegers on 18-01-2024 10:53
#6

Second impression is ….. Nemorilla :)

female N. floralis

Theo

Posted by Morten A Mjelde on 18-01-2024 18:26
#7

Thanks a lot! :)
Could I ask you: 3rd antennal segment is 1.55X as long as the 2nd. (If I measure from photo no. 2) The 2nd antennal segment is yellowish and the frons is also quite wide - could it be F. maculosa?

Morten

Posted by Zeegers on 18-01-2024 19:05
#8

Females are very tricky, but abdominal pattern disagrees with maculosa, I’d say. Length of third antennal segment is sexual dimorph, as probably is yhe colouration. Are you sure you are citing female values ?

Theo

Posted by Morten A Mjelde on 18-01-2024 19:46
#9

Thanks! You know this much better than me!. But yes - according to Tschorsnig key:Floralis: Females: frons 0.75 - 0.92x as wide as
one eye; 3rd antennal segment 1.64 - 1.96x as long as the 2nd; 2nd antennal segment black to brown. Maculosa: Females: frons 0.90 - 1.06x as wide as one eye;
3rd antennal segment 1.23 - 1.71x as long as the 2nd; 2nd antennal segment yellow to brown.

Morten

Posted by Zeegers on 19-01-2024 09:05
#10

Colouration supports maculosa, but vertex says floralis and third antennal segment looks loger to me.
When possible, I prefer structural features above colours, which have a tendency to be more variable.

But, ID based on males is always to be preferred in Nemorilla !

Theo

Posted by Morten A Mjelde on 19-01-2024 11:08
#11

Thank you very much for the useful information! I'll find a male next time...:)

Morten