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Agromyzid parasitoid - Colastes

Agromyzid parasitoid - Colastes
New Marlborough, Berkshire County, Massachusetts, USA
Size: ~2 mm
Found in a bag in which I had placed these leaves:

Images of this individual: tag all
Agromyzid parasitoid - Colastes Agromyzid parasitoid - Colastes Agromyzid parasitoid - Colastes

Moved from Braconid Wasps.
Determined January 27, 2012 by Robert Kula, Systematic Entomology Laboratory. Colastes is listed as belonging to the subfamily Hormiinae in the identification report and at the Hymenoptera Name Server... on what basis is it placed in Exothecinae here?

Dr. Sharkey identified the genus, but he didn't specify the subfamily, so I evidently went with the placement of the genus indicated on Taxapad, assuming it to be up to date. I will ask Dr. Sharkey about this disparity.

Dr. Sharkey suggests: "Both subfamilies are very wrong so to me it is not important which subfamily they go in. In the most recent phylogenetic analysis they are placed in an informal group called the Alysioid subcomplex, where they came out as sister to Opiinae (Alysiinae was not included in the analysis). They probably deserve their own subfamily. Sorry I don’t have a better answer for you."

In any case, the Hymenoptera Name Server you cite is apparently out of date, and the classification that Whitfield put on the Tree of Life is more up to date and is apparently in agreement with what I find on Taxapad. Therefore, I conclude that Exothecinae is best for the time being.

Moved from parasitic Apocrita.