Posted by jck on 16-05-2022 16:14
#1
Can anyone help with this male? Apeldoorn, NL on 27 April, 2022.
James
Edited by jck on 25-05-2022 12:03
Posted by eklans on 16-05-2022 17:36
#4
Hi James, could be we are lucky: I've found a similar female some days ago and I've keyed (Gregor et al) it as
Helina deleta:
Legs mainly black
Wing base distincly yellow
2-4 dc
3-5 ac on t3
May to July...
Edited by eklans on 16-05-2022 17:38
Posted by jck on 16-05-2022 21:34
#6
Thank you both. Helina deleta would be an exceptional find, Erik, as it has not yet been recorded in the Netherlands. I am attaching a photo of the wingbase but I doubt it's good enough. Look forward to your reactions.
James
Posted by eklans on 07-08-2022 12:37
#8
Hi James, I've checked all possible Helinas following Gregor et al's key 8 Radial node setulose and this is the result (with one excluding criterion for our flies):
cilipes => frons male broad
trivittata => frons male broad
decipiens => 3dc post, legs ±yellow
moedlingensis => frons male broad
fratercula => 3dc post
vicina => legs ±yellow
pollinosa => South Europe
consimils => 3dc post, legs ±yellow
crinita => legs ±yellow
ciliatocosta => legs ±yellow
confinis => legs ±yellow
Compared to the description of delete we can see:
? longest aristal hairs about 2x postpedicel
y pra > p npl
y wings intensively yellow basally
y calypters conspicuously yellow
y legs black
y? tibia II 3 p
y tibia III 3-5 av, 2 ad
your male
y? eyes densely pale haired
y very narrow fronto-orbital plates separated by linear frontal vitta
y? tibia I 0 p
? tibia III few elongated p setae
? abdomen densely grey dusted, 2 pairs of spots
my female
y eyes only sparesly haired
? tibia I 1 p
y tibia III no elongated p setae
? abdomen grey dusted, shifting black spots
You'll find the thread here:
https://diptera.i..._id=105979
Résumé:
I think, both flies are
Helina deleta but I'm not an expert!
Posted by jck on 07-08-2022 16:28
#9
Eric, thank you so much for your detailed study of this male. I will see what they say on the Dutch forum (Waarneming.nl) and I will report back if I get an answer. I doubt they will accept a new species without a specimen.
James