Diptera.info :: Identification queries :: Diptera (adults)
 Mydaea sp. - but which?
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| Walther Gritsch |
Posted on 11-09-2009 22:10
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 Member Location: Copenhagen Posts: 290 Joined: 31.01.09 |
Hi I have reached a dead-end with this Mydaea female. At first I thought M. ancilla, but the posterior crossvein is supposed to be oblique in that species - or is that only in the male? The mediotergite is glossy black in the middle but dusted at the sides so this is not being very helpful either. Caught on 8. IX 2009 near Copenhagen in deciduous forest with birch and willow. Body length some 5.5 mm. Thanks in advance 
Walther Gritsch attached the following image:  [166.06Kb] Walther |
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| Stephane Lebrun |
Posted on 12-09-2009 10:37
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 Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
At least this is not Mydaea ancilla, I agree. To go on, I'll need to know the length of aristal hairs, pre-alar seta, whether it has a p. seta on fore tibia, whether the palpi are dilated.
Stephane. |
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| Walther Gritsch |
Posted on 12-09-2009 11:52
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Member Location: Copenhagen Posts: 290 Joined: 31.01.09 |
Thanks for the effort so far. In answer to your questions: -Total width of aristal hairs slightly exceeding width of flagellomere. -Prealar equal to posterior notopleural seta. -Posterior seta on t1. -Palpi not dilated. All these features add up to M. nebulosa - I'm confident of that now. Do you agree? What fooled me was the p on t1 - the right leg doesn't have it and no scar either, but the left (obscured) leg does indeed have a posterior seta on the tibia. Mydaea nebulosa is quite a nice find it would seem. Alternatively it might just be underreported! Walther |
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| Stephane Lebrun |
Posted on 13-09-2009 09:50
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Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
All seems to point to it indeed, it's a pity I haven't yet this species in collection to compare.
Stephane. |
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