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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Aschiza" » Hover Flies (Syrphidae) » Syrphinae » Syrphini » Dasysyrphus » venustus group (Dasysyrphus venustus group) » intrudens complex (Dasysyrphus intrudens)
Photo#340792
Lapposyrphus? - Dasysyrphus intrudens - female
Copyright © 2009 Natalie McNear

Lapposyrphus? - Dasysyrphus intrudens - Female
Marin County, California, USA
October 5, 2009
Size: 12 mm body length
A lot of the species in this tribe look very similar, but Lapposyrphus is the closest thing I can find to my fly in terms of shape and body pattern. Scaeva also looks a lot like it.

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Lapposyrphus? - Dasysyrphus intrudens - female Lapposyrphus? - Dasysyrphus intrudens - female
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Contributed by Natalie McNear on 5 October, 2009 - 10:06pm
Last updated 11 December, 2013 - 1:43pm

Moved
Moved from Dasysyrphus.
… v belov, 11 December, 2013 - 1:43pm login or register to post comments

I think Dasysyrphus intrudens
I think Dasysyrphus intrudens species complex, using the new Locke and Skevington key (Zootaxa 3660, 2013).

The maculae on tergies 3-4 appear to reach the edge of the abdomen (very nicely shown with your second shot!), maculae on tergite 2 are large, and the maculae on 3+4 fit the description of the intrudens species complex (arcuate/lunulate, U/V shape on anterior edge, constricted in the middle, large swelling on medial edge) better than they fit venustus (venustus is described as the maculae being transverse, constricted slightly medially, medial edge swollen slightly).
… Kelsey J.R.P. Byers, 9 December, 2013 - 12:17am login or register to post comments

Moved
Moved from Syrphini.
… Natalie McNear, 5 October, 2009 - 11:31pm login or register to post comments

Right tribe
It's a female Dasysyrphus. (Compare the lower sets of light, broken stripes to those of Scaeva. Note rounded interior ends there, "squared off" ends here. Color's different, too.)

… Ron Hemberger, 5 October, 2009 - 11:06pm login or register to post comments

 
Re: Right tribe
Thanks! That appears to be a good match.
… Natalie McNear, 5 October, 2009 - 11:30pm login or register to post comments

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