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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Nematocera" (Non-Brachycera) » Gnats, Gall Midges, and March Flies (Bibionomorpha) » Fungus Gnats and Gall Midges (Sciaroidea) » Gall Midges and Wood Midges (Cecidomyiidae) » Gall Midges (Cecidomyiinae) » Lasiopteridi » Oligotrophini » Rhopalomyia » Coyote Brush Bud Gall Midge (Rhopalomyia californica)
Photo#361179
coyote brush gall midge - Rhopalomyia californica
Copyright © 2009 Joyce Gross

coyote brush gall midge - Rhopalomyia californica
Knowland Park, Oakland, Alameda County, California, USA
April 18, 2008
Reared from gall on coyote brush (Baccharis pilularis).

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coyote brush gall midge - Rhopalomyia californica coyote brush gall midge - Rhopalomyia californica coyote brush gall midge - Rhopalomyia californica
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Contributed by Joyce Gross on 27 December, 2009 - 11:13pm

I believe this is probably a male
My understanding is that at emergence the females' abdomens are distinctly orange-ish from the masses of eggs. See the images at Peter J. Bryant's R. californica page.

I'd be curious if you could share your experiences with rearing the gall. At what point in its life-cycle did you collect it or enclose it? Did you actually remove it from the plant?
… John Callender, 28 January, 2012 - 8:56pm login or register to post comments

 
more info
I checked my files and it appears that I collected the gall on April 15th, a few days before the midge emerged, and put it in a glass-topped container. The gall already had holes in it on the 15th, with exuvia stuck in the holes, when I collected it. Apparently not everything had emerged yet.

Yes, it does look likely that this midge is a male.
… Joyce Gross, 31 January, 2012 - 8:59pm login or register to post comments

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