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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
Photo#1276827
Cecidomyiidae on Prairie Sage - Rhopalomyia
Copyright © 2016 MJ Hatfield

Cecidomyiidae on Prairie Sage - Rhopalomyia
W-14, gravel road ditch, Winneshiek County, Iowa, USA
August 16, 2016
Size: galls 2-3 mm
J van der Linden told me about lep larvae he collected on the swollen stems of Prairie Sage, Artemisia ludoviciana, so of course I had to go looking.
Batch rearing.

July 19, 2016: found some sage in a nearby road ditch and sure enough, swollen stems. As I was setting up the rearing container I did note that there were fuzzy galls on the back of leaves but for some reason did not separate them out even though I had run across these galls in 2006

August 14, 2016: (on or before) a live adult gall fly. Took a closer look at the sage in the container, separated out the fuzzy galls, and found one with a spent fly pupal case
August 16, 2016: a live fly

August 17, 2016: cut open each of 3 galls in a cluster , another adult fly
September 12, 2016: Dr. Gagné confirmed.
October 23, 2016: found 2 dead flies for a total of 5 adult flies and a spent pupa

Images of this individual: tag all
Cecidomyiidae on Prairie Sage - Rhopalomyia Cecidomyiidae on Prairie Sage, spent pupal case - Rhopalomyia Cecidomyiidae on Prairie Sage, dorsal - Rhopalomyia - female Cecidomyiidae on Prairie Sage, lateral - Rhopalomyia - female
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Contributed by MJ Hatfield on 16 August, 2016 - 10:10am
Last updated 15 March, 2022 - 6:48pm

Moved
Moved from Rhopalomyia gnaphalodis. See my comment here: https://bugguide.net/node/view/598680/bgimage Sorry for the confusion!
… Joshua C'deBaca, 15 March, 2022 - 6:48pm login or register to post comments

Moved
Moved from Rhopalomyia.
… Joshua C'deBaca, 15 March, 2022 - 6:42pm login or register to post comments

Rhopalomyia gnaphalodis
These are induced by Rhopalomyia gnaphalodis, nice find!
… Joshua C'deBaca, 13 March, 2022 - 11:41pm login or register to post comments

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