Thread subject: Diptera.info :: Anthomyiidae flew inside (= Eutrichota cf. lipsia)
#1
Last November 1, Massachusetts, USA. Insects flew late last fall. Size 10 mm. I think it is female Anthomyiidae.
More and larger pictures
http://www.flickr...11/detail/
#2
Looks like Eutrichota...
Do you have a sharp view on the arista and frontal vitta.
Joke
#4
Previous Eutrichota was called Pegomyza.
Eutrichota has indeed resemblance with Pegomya but differs mainly on structure of male genitals and the long/pubescent arista (in some species almost bare)
Eutrichota mostly is a very large fly and has long legs..
In this case the arista seems indeed only pubescent and it seems that the midtibia has no av seta....and with tarsomeres 3+4 distincly expanded.....
With this combination, I would say Eutrichota frigida. (90%)
Joke
#5
I have acquired the relevant section of
Flies of the Nearctic Region. According to Griffiths
Eutrichota frigida has tarsomeres 2-4 slightly expanded. The local species with these tarsomeres twice as wide as the fifth, as in my fly, are
E. lipsia and possibly
E. tarsata, which differ in other details.
Are there any pictures or drawings available of the fore leg of female
E. frigida?
#6
Unfortunally I don’t have the part about Eutrichota from Griffiths. (I will order them soom, but they are very expensive, so just save enough money to order all parts at ones)
The tarsomeres in E. frigida are longer, comparing with the tarsomeres on your photo, who seems shorter.
I can’t confirm if it is E. lipsia, but with a nice Nearctic key in hand…you could ID it on your one, without help.
#7
I'm also missing an important part of Griffiths -- the key to
Eutrichota. The species descriptions are in number 4 but the key must be in number 5, which I don't have. The volume breaks are not at logical divisions.
#8
What a shame....when I have number 5, I will send you a copy of the key!
#9
I have Griffiths' key now, but I lack confidence interpreting the degree of dusting on the thorax. Michael Ackland has just identified a male specimen from nearby as
Eutrichota lipsia and I suspect this female is the same, common species.