Thread subject: Diptera.info :: Help! Are these all Scatophaga stercoraria?

Posted by Stephen on 18-03-2007 22:03
#1
I am confused. Are these photos all showing Scatophaga stercoraria?

Some some much hairier than others (I have just replaced an earlier image with the one right below, showing a very hairy individual).

Some are hairy, some are less so. Some were yellow, some green, some gray.

They weren't on dung, but were hunting like Tiger Beetles, preying upon other flies.

Thanks in advance for any help!

Place: Sugar Maple tree, forest, West Virginia USA, 13 March 2007. Size: 8.7 mm.
Edited by Stephen on 20-03-2007 21:57

Posted by Stephen on 18-03-2007 22:07
#2
Here is one with its prey, which I believe is a Mycetophilid.

Posted by Stephen on 18-03-2007 22:09
#3
Here is a detailed lateral view of the head and thorax.

Posted by Stephen on 18-03-2007 22:11
#4
Is this the female S. stercoraria?

Posted by Stephen on 20-03-2007 22:01
#5
This one was more green in color and less hairy than many of the others.

Posted by Nikita Vikhrev on 20-03-2007 22:12
#6
Stephen, all images excluding N4 is S. stercoraria. N4 seems has not black antennae and bare arista.
Nikita

Posted by Stephen on 21-03-2007 10:40
#7
Thanks, Nikita! I will work on posting several views of the gray one as a new posting, and perhaps an ID will be possible of it too. Thanks again for all your help.