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Photo#333462
Rhopalomyia anthophila larvae + parasitoid - Rhopalomyia anthophila

Rhopalomyia anthophila larvae + parasitoid - Rhopalomyia anthophila
Lake Hawthorn, Mahaska County, Iowa, USA
September 10, 2009
Size: 1+ mm

Images of this individual: tag all
Cecidomyiidae, Solidago flower galls - Rhopalomyia anthophila Rhopalomyia anthophila, Solidago flower gall with 2 larvae - Rhopalomyia anthophila Rhopalomyia anthophila, Solidago flower gall with 2 larvae - Rhopalomyia anthophila Rhopalomyia anthophila larvae + parasitoid - Rhopalomyia anthophila Rhopalomyia anthophila larvae + parasitoid - Rhopalomyia anthophila

Moved
Moved from ID Request.

Take a look at Cecidomyiidae
Gall Midges. I'll take a look in my Immature Insects book and see which ones like Solidago.

http://bugguide.net/node/view/8383/bgimage

 
Thank you. Gagne's book, "Th
Thank you.
Gagne's book, "The Plant-Feeding Gall Midges of North America" keys: Solidago, bud or flower gall, galls cylindrical-not formed of leaf rosette, modified floret, gall widest at base-fuzzy = Rhopalomyia anthophilia. But I don't think the smaller larva is the same.

 
Rhopalomyia anthophilia
I agree with your ID of the gallmaker, and I just made a guide page for that species, but I left your images in ID Request for now to see if there are any more comments on the larvae. I agree that these look like two different larvae... I'm no expert in these matters, but my guess would be that the smaller one is dipteran and the larger is hymenopteran.

 
Thanks Charley. I was 'guessi
Thanks Charley. I was 'guessing' just the opposite; big fly, little wasp.

 
You may well be right
It would make more sense for an inquiline/parasitoid to be smaller than its host. My impression is based on a gestalt sense from other larvae I have seen, but I really haven't done much looking inside galls so my guess isn't worth much.

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