Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
My beautiful escapees. Goldenrod gall parasitoid - male

My beautiful escapees. Goldenrod gall parasitoid - Male
Pennypack Restoration Trust, Montgomery County, Pennsylvania, USA
Size: 2 mm
So much for covering them with netting! A few days ago I gathered a number of goldenrod twigs with small galls, like the ones here. I put them in several containers with water, covered them with netting and put them by the window. Luckily the window stayed closed, because these three managed to escape (at least I am pretty sure that they didn't come from somewhere else but from the galls) and I found them. This photo was taken on 7/13/09 but I am not putting the date in the field.
They appear to be three different species of goldenrod gall fauna.

Moved from Eulophidae.

This is the family ...
... Pteromalidae (Pteromalinae), a male.

The 4-segmented tarsi helps distinguish this chalcid from the very similar pteromalid group. These wasps also shrivel up badly after death (note abdomen) which is also a characteristic of this subfamily. Most species are primary parasitoids of hidden larvae (e.g. leafmining orders such as Lepidoptera, Hymenoptera, etc.), and some are hyperparasitoids as well. The host range is very diverse.

See reference here.