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I've put some time into this specimen and come up with Phaonia tuguriorum female, 15.iii.2017 Swindon, N. Wilts VC 7. It's begun to grease too. Now time for bed.
Can anyone verify my conclusion please?
Thanking you in advance.
the fly bears a resemblance to P. tuguriorum but I have trouble seeing certain features in your photos. For one, I cannot see the Phaonia bristle on the hind tibia. Is it present?
the scutellum is blurry but it looks like it is brown. The scutellum should be brown or orange-brown when viewed from behind at an angle.
the arista are hairy. the pedicel of the antennae are orange-brown. The first flagellomere seems to be pubescent.
I think that the fly could very well be P. tuguriorum.
No pre sutural ac
4 post sutural dc
2 posterior bristles on front tibia
gena about half eye height
should get you to tuguriorum (pics attached)
Thank you for your time. My next effort will be to take more useful images for such an exercise.
The scutellum has a dark base and yellowish apex. The arista is plumose, pedicel to antennae is orange-brown. The first flagellomere when re-examined just now does have a very very fine pubescence, I it took to be service texturing until your enquiry made me look again.
May I ask what the "Phaonia bristle on the hind tibia" is, sorry to be dense, but my look through several keys drew a blank, probably as I'm being too literal.
Neil. thank you, yours was incoming whilst I was composing my reply to Phaonia73. Is there a key to User ID's too? :-)
Last edited by Marc Taylor (2017-03-19 16:11:06)
The 'Phaonia bristle' is a not quite strictly dorsal bristle on hind tibia -
In order for you to guess Phaonia, you must've looked at the postsutural bristles. I cannot see them in your photos but I trust your conjecture. I look at visible body and it matches Phaonia cf tuguriorum. Time of year is accurate for this species.
I like to judge insects like a prosecuting attorney, then play defense attorney in a high profile case :-D thus, I see what could be a Phaonia bristle but it is blurry. Defense could argue that evidence is unsubstantial because the object could be a fiber or other trace material. As such, I cannot say that the fly has the Phaonia bristle that indicates a Phaonia species.
Meantime, most dipterists will claim that the scutellum is yellowish. However, it is a dusting that makes it appear to be beige/yellowish. The scutellum is actually brown or orange brown. I've attached photos of mine for reference. I've also attached a photo of the Phaonia bristle for reference.
I am confident that this is tuguriorum if all of the facts are considered to be true.
The orange pedicel, hairy (plumose) arista, yellowish dusting of brown scutellum, reddish legs, postsutural bristles, dark lines on thorax, no orange hairs at the gena, long hairs under first femora, dark tarsus, cross veins infuscated but not too much etc. All of the facts point to Phaonia tuguriorum.
try to peek at the Phaonia bristle if you have time.
I hope that you have a Wonderful Day.
Last edited by Phaonia73 (2017-04-07 13:54:17)