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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » Orthorrhapha » Tabanomorpha » Horse and Deer Flies (Tabanidae) » Unidentified Deer and Horse Fly Eggs
Photo#274442
Fishfly eggs?
Copyright © 2009 Lisa Wrinkle

Fishfly eggs?
Independence Creek, Terrell County, Texas, USA
May 11, 2009
Size: ~12 mm / cluster
A friend of mine photographed these in the creek bed. She said a fly with a white spot where the wings come together was "working" the white cluster (very back of the photo) with its abdomen. Could these be Nigronia egg cases before the white is applied? I don't even know what Nigronia eggs look like.

Images of this individual: tag all
Fishfly eggs? Fishfly eggs?
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Contributed by Lee Elliott on 11 May, 2009 - 12:03pm
Last updated 3 October, 2010 - 7:21pm

Moved
Moved from Horse and Deer Flies.
… Charley Eiseman, 3 October, 2010 - 7:22pm login or register to post comments

Not Nigronia
Lisa Wrinkle, the photographer, says definitely not Nigronia (from bugguide images). Maybe dobsonfly? Adult is NOT in the image (she tried but missed it). Thanks, John, for the horse fly egg for comparison.
… Lee Elliott, 11 May, 2009 - 12:49pm login or register to post comments

Not an ID
I can't see the fly, and I also don't know what Nigronia eggs look like. Here are some horse fly eggs, but they are darker.
… John R. Maxwell, 11 May, 2009 - 12:39pm login or register to post comments

 
Tabanidae
Could be deer fly or horse fly. Their eggs are whitish when laid. As they age, they turn brown, then black (as shown in the thumbnails above). The coloring of the other eggs in Lisa's images suggests to me that they have all been parasitized, but I wouldn't swear to that. In the image to the right, there is an insect visible on the white egg mass that is more than likely a chalcid parasitoid ovipositing in the tabanid eggs.
… Charley Eiseman, 11 May, 2009 - 5:15pm login or register to post comments

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